Met de klok mee:

Room EQ Wizard decibelmeting (gratis) in Z-weging,

SpectrumLab spectrumanalyse (gratis) 0-155 Hz,

Windy windkaart (gratis),

Fitbit sleep tracking (aanschafprijs, daarna gratis),

Sleep Cycle sleep tracking (gratis).

In het midden opnieuw de Windy windkaart app.

Vanaf 6 januari aangevuld met de Oura ring 

slaap & health tracker (aanschafprijs, daarna betaald).
Meetmicrofoons (2x): miniDSP UMIK-1

De ochtend van 25 februari

De eN3 ("estimated deep sleep") volgens de apps:

Oura 41 minuten

Sleep Cycle 13 minuten

Fitbit 59 minuten

iHealth 40 minuten

Zoals je kunt zien is Sleep Cycle weer de meest "pessimistische". Fitbit is zoals wel vaker het meest optimistisch.

De gegevens volgens Oura, die deze nacht de tweede slaapsessie over het hoofd heeft gezien omdat deze te kort duurde en de slaap niet diep genoeg was:

Oura interpreteerde de tweede slaapfase als "restorative time", alsof ik had liggen mediteren:

De slaapgegevens volgens Sleep Cycle, verdeeld over twee slaapsessies:

De slaapgegevens volgens Fitbit, zonder informatie over de tweede slaapsessie behalve de duur ervan:

De synthese van iHealth:

De geluidsdruk (decibellen) in Z-weging tijdens de eerste slaapsessie, waarbij ik vooral geïnteresseerd ben in de roze lijn, de LZeq per minuut (hier zo'n 56 dBZ aan het begin van de nacht en zo'n 51 dBZ bij het ontwaken rond half vijf):

En de decibellen tijdens de tweede slaapsessie (in een iets andere schaal weergegeven), hier dus zo'n 52 dBZ bij het in slaap vallen en 54 dBZ bij het ontwaken:

Hieronder wat screenshots uit het spectrogram (frequenties weergegeven in Hertz, met het laagfrequente en infrasone geluid links) van deze nacht. Vanwege de lage windsnelheid is de geluidsdruk relatief laag, en begint de nacht "stil":

Na middernacht wel weer een kronkelende bromtoon rond de 47 Hz (later verschuivend naar de 49 Hz):

Het beeld vlak voor mijn ontwaken (het geluid van mijn ontwaken en toiletbezoek is hier zichtbaar als horizontale strepen):

De tweede slaapsessie vanaf 05:36 uur:

Toename van omgevingsgeluid (voertuigen?) in de vroege ochtend:

Tijdens die slaapsessie had ik enkel een lichte slaap, met zo nu en dan een micro-arousal en aan het einde een droomfase:

Tenslotte nog de weerkaarten, zodat we kunnen zien wat de windrichting en windsnelheid was. Weergegeven in knopen, dus hier een zuidenwind van 5 knopen zowel in de avond als in de ochtend:

Aanvullende informatie over mijn hartslag tijdens de eerste slaapsessie en de tweede:

Wat me al een tijdje opvalt is dat mijn hartslag bij de tweede slaapsessie, nadat ik een uurtje wakker ben geweest om wat te drinken, me uit te rekken, iets te eten en/of alvast wat werk te doen op de computer, vrijwel altijd een stuk trager is.

Sleep, Sound & Wind Log #47

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-02-25
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 4h 42m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 27m
* **MainSleep_TotalSleep_Fitbit_min** 6h 29m
* **MainSleep_TotalSleep_iHealth_min** 6h 10m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 41m
* **MainSleep_eN3_SleepCycle_min** 13m
* **MainSleep_eN3_Fitbit_min** 59m
* **MainSleep_eN3_iHealth_min** 40m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 56 dB
* **MainSleep_LZeq_End_dB** 54 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** S
* **MainSleep_WindSpeed_Start** 5 Kt
* **MainSleep_WindDirection_End** S
* **MainSleep_WindSpeed_End** 5 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 26 februari

De eN3 volgens de apps:

Oura 41 minuten

Sleep Cycle 34 minuten + 7 minuten = 41 minuten

Fitbit 33 minuten

iHealth 43 minuten

Sleep, Sound & Wind Log #48

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-02-26
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 12m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 18m
* **MainSleep_TotalSleep_Fitbit_min** 5h 16m
* **MainSleep_TotalSleep_iHealth_min** 5h 15m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 41m
* **MainSleep_eN3_SleepCycle_min** 41m
* **MainSleep_eN3_Fitbit_min** 33m
* **MainSleep_eN3_iHealth_min** 43m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 64 dB
* **MainSleep_LZeq_End_dB** 63 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** S
* **MainSleep_WindSpeed_Start** 7 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 9 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 27 februari

Sleep, Sound & Wind Log #49

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-02-27
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 43m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 42m
* **MainSleep_TotalSleep_Fitbit_min** 6h 44m
* **MainSleep_TotalSleep_iHealth_min** 6h 51m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 56 m
* **MainSleep_eN3_SleepCycle_min** 50m
* **MainSleep_eN3_Fitbit_min** 74m
* **MainSleep_eN3_iHealth_min** 55m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 65 dB
* **MainSleep_LZeq_End_dB** 63 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 11 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 10 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 28 februari

Ik werd al erg vroeg in de ochtend wakker dus heb enkele uren later (van half tien tot twaalf uur) een dutje gedaan. Met succes: twee uur slaap, waaronder enkele minuten diepe slaap, ondanks de harde (hoorbare) wind en hogere infrasone geluidsdruk.

De eN3 volgens de apps:

Oura 59 minuten + 29 minuten = 78 minuten

Sleep Cycle 36 minuten + 3 minuten = 39 minuten

Fitbit 52 minuten 

iHealth 60 minuten

Spectrogram van vijf uur 's ochtends:

Sleep, Sound & Wind Log #50

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-02-28
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 1
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 4h 10m
* **MainSleep_TotalSleep_SleepCycle_min** 4h 31m
* **MainSleep_TotalSleep_Fitbit_min** 4h 26m
* **MainSleep_TotalSleep_iHealth_min** 4h 11m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 59m
* **MainSleep_eN3_SleepCycle_min** 36m
* **MainSleep_eN3_Fitbit_min** 52m
* **MainSleep_eN3_iHealth_min** 58m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min** 2h 15m
* **Nap_TotalSleep_SleepCycle_min** 2h 19m

* **Nap_TotalSleep_iHealth_min** 2h 27m

### Deep Sleep (eN3)
* **Nap_eN3_Oura_min** 29m
* **Nap_eN3_SleepCycle_min** 3m

* **Nap_eN3_iHealth_min** 2m
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 55 dB
* **MainSleep_LZeq_End_dB** 60 dB
### Nap
* **Nap_LZeq_Start_dB** 64 dB
* **Nap_LZeq_End_dB** 68 dB
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 7 Kt
* **MainSleep_WindDirection_End** S
* **MainSleep_WindSpeed_End** 8 Kt
### Nap
* **Nap_WindDirection_Start** SW
* **Nap_WindSpeed_Start** 12 Kt
* **Nap_WindDirection_End** SW
* **Nap_WindSpeed_End** 15 Kt
---
## NOTES & CONTEXT
---

*****

De ochtend van 1 maart

De eN3 volgens de apps:

Oura 55 minuten

Sleep Cycle 22 minuten

Fitbit 51 minuten

iHealth 54 minuten

Sleep, Sound & Wind Log #51

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-01
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 4h 24m
* **MainSleep_TotalSleep_SleepCycle_min** 5h 17m
* **MainSleep_TotalSleep_Fitbit_min** 5h 22m
* **MainSleep_TotalSleep_iHealth_min** 4h 25m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 55m
* **MainSleep_eN3_SleepCycle_min** 22m
* **MainSleep_eN3_Fitbit_min** 51m
* **MainSleep_eN3_iHealth_min** 54m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 64 dB
* **MainSleep_LZeq_End_dB** 60 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 10 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 8 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 2 maart

Oura 47 minuten

Sleep Cycle 35 minuten

Fitbit 57 minuten

iHealth 46 minuten

Sleep, Sound & Wind Log #52

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-02
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 5m
* **MainSleep_TotalSleep_SleepCycle_min** 5h 25m
* **MainSleep_TotalSleep_Fitbit_min** 5h 25m
* **MainSleep_TotalSleep_iHealth_min** 5h 5m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 47m
* **MainSleep_eN3_SleepCycle_min** 35m
* **MainSleep_eN3_Fitbit_min** 57m
* **MainSleep_eN3_iHealth_min** 46m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 63 dB
* **MainSleep_LZeq_End_dB** 62 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 10 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 7 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 3 maart

Oura 62 minuten

Sleep Cycle 41 minuten

Fitbit 60 minuten

iHealth 64 minuten

Sleep, Sound & Wind Log #53

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-03
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 7h 19m
* **MainSleep_TotalSleep_SleepCycle_min** 7h 35m
* **MainSleep_TotalSleep_Fitbit_min** 7h 2m
* **MainSleep_TotalSleep_iHealth_min** 7h 27m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 62m
* **MainSleep_eN3_SleepCycle_min** 41m
* **MainSleep_eN3_Fitbit_min** 60m
* **MainSleep_eN3_iHealth_min** 64m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 58 dB
* **MainSleep_LZeq_End_dB** 58 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** S
* **MainSleep_WindSpeed_Start** 5 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 4 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 4 maart

Oura 58 minuten

Sleep Cycle 24 minuten

Fitbit 66 minuten

iHealth 58 minuten

Sleep, Sound & Wind Log #54

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-04
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 36m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 57m
* **MainSleep_TotalSleep_Fitbit_min** 6h 39m
* **MainSleep_TotalSleep_iHealth_min** 6h 37m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 58m
* **MainSleep_eN3_SleepCycle_min** 24m
* **MainSleep_eN3_Fitbit_min** 66m
* **MainSleep_eN3_iHealth_min** 58m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 59 dB
* **MainSleep_LZeq_End_dB** 63 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** NE
* **MainSleep_WindSpeed_Start** 5 Kt
* **MainSleep_WindDirection_End** E
* **MainSleep_WindSpeed_End** 6 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 5 maart

Oura 73 minuten

Sleep Cycle 46 minuten

Fitbit 53 minuten

iHealth 74 minuten

Sleep, Sound & Wind Log #55

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-05
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 47m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 38m
* **MainSleep_TotalSleep_Fitbit_min** 6h 32m
* **MainSleep_TotalSleep_iHealth_min** 6h 42m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 73m
* **MainSleep_eN3_SleepCycle_min** 46m
* **MainSleep_eN3_Fitbit_min** 53m
* **MainSleep_eN3_iHealth_min** 74m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 64 dB
* **MainSleep_LZeq_End_dB** 57 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** E
* **MainSleep_WindSpeed_Start** 5 Kt
* **MainSleep_WindDirection_End** SE 
* **MainSleep_WindSpeed_End** 4 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 6 maart

Oura 52 minuten

Sleep Cycle 29 minuten

Fitbit 74 minuten

iHealth 51 minuten

Om de een of andere reden heeft iHealth mijn werkdag als slaap geïnterpreteerd (ik had mijn Oura ring thuisgelaten en droeg ook geen smartwatch). De diepe slaap is goed berekend. In het logbestand hieronder zal ik voor het totaal de tijd van Oura overnemen, aangezien iHealth dat normaliter ook zelf doet.

Sleep, Sound & Wind Log #56

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-06
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 43m
* **MainSleep_TotalSleep_SleepCycle_min** 5h 53m
* **MainSleep_TotalSleep_Fitbit_min** 6h 3m
* **MainSleep_TotalSleep_iHealth_min** 5h 43m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 52m
* **MainSleep_eN3_SleepCycle_min** 29m
* **MainSleep_eN3_Fitbit_min** 74m
* **MainSleep_eN3_iHealth_min** 51m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 62 dB
* **MainSleep_LZeq_End_dB** 59 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SE
* **MainSleep_WindSpeed_Start** 7 Kt
* **MainSleep_WindDirection_End** S
* **MainSleep_WindSpeed_End** 4 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 7 maart

Oura 69 minuten

Sleep Cycle 50 minuten

Fitbit 54 minuten 

iHealth 66 minuten

Sleep, Sound & Wind Log #57

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-07
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 34m
* **MainSleep_TotalSleep_SleepCycle_min** 5h 51m
* **MainSleep_TotalSleep_Fitbit_min** 5h 46m
* **MainSleep_TotalSleep_iHealth_min** 5h 40m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 69m
* **MainSleep_eN3_SleepCycle_min** 50m
* **MainSleep_eN3_Fitbit_min** 54m
* **MainSleep_eN3_iHealth_min** 66m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 50 dB
* **MainSleep_LZeq_End_dB** 52 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** NW
* **MainSleep_WindSpeed_Start** 3 Kt
* **MainSleep_WindDirection_End** NW
* **MainSleep_WindSpeed_End** 4 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 8 maart

Afgelopen nacht was mijn slaap verdeeld in twee slaapblokken. Het eerste duurde ongeveer vijf uur en het tweede iets meer dan twee uur. In beide slaapblokken vond diepe slaap plaats, al heeft Fitbit het niet geregistreerd (om die reden mijn minst favoriete app).

De totale eN3 volgens de apps:

Oura 43 minuten + 36 minuten = 79 minuten

Sleep Cycle 28 minuten + 19 minuten = 47 minuten

Fitbit 59 minuten

iHealth 42 minuten + 18 minuten = 60 minuten

Sleep, Sound & Wind Log #58

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-08
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 22m
* **MainSleep_TotalSleep_SleepCycle_min** 7h 0m
* **MainSleep_TotalSleep_Fitbit_min** 6h 47m
* **MainSleep_TotalSleep_iHealth_min** 6h 44m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 79m
* **MainSleep_eN3_SleepCycle_min** 47m
* **MainSleep_eN3_Fitbit_min** 59m
* **MainSleep_eN3_iHealth_min** 60m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 52 dB
* **MainSleep_LZeq_End_dB** 55 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** N
* **MainSleep_WindSpeed_Start** 4 Kt
* **MainSleep_WindDirection_End** E
* **MainSleep_WindSpeed_End** 5 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 9 maart

Oura 66 minuten

Sleep Cycle 25 minuten

Fitbit 46 minuten

iHealth 67 minuten

Sleep, Sound & Wind Log #59

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-09
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 14m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 29m
* **MainSleep_TotalSleep_Fitbit_min** 6h 30m
* **MainSleep_TotalSleep_iHealth_min** 6h 22m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 66m
* **MainSleep_eN3_SleepCycle_min** 25m
* **MainSleep_eN3_Fitbit_min** 46m
* **MainSleep_eN3_iHealth_min** 67m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 53 dB
* **MainSleep_LZeq_End_dB** 55 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SE
* **MainSleep_WindSpeed_Start** 4 Kt
* **MainSleep_WindDirection_End** SE
* **MainSleep_WindSpeed_End** 2 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 10 maart

Sleep, Sound & Wind Log #60

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-10
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 0m
* **MainSleep_TotalSleep_SleepCycle_min** 5h 12m
* **MainSleep_TotalSleep_Fitbit_min** 5h 14m
* **MainSleep_TotalSleep_iHealth_min** 5h 7m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 57m
* **MainSleep_eN3_SleepCycle_min** 19m
* **MainSleep_eN3_Fitbit_min** 56m
* **MainSleep_eN3_iHealth_min** 56m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 50 dB
* **MainSleep_LZeq_End_dB** 51 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** N
* **MainSleep_WindSpeed_Start** 3 Kt
* **MainSleep_WindDirection_End** SE
* **MainSleep_WindSpeed_End** 2 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 11 maart

Ik was gisteravond al in de huiskamer in slaap gevallen. Ik was even gaan liggen met muziek aan, en werd twee uur later wakker. Aanvankelijk had ik niet eens door dat ik geslapen had, maar gelukkig had ik mijn Oura ring om die de slaap geregistreerd had. Ik had niet alleen geslapen maar zelfs diepe slaap gehad (met psytrance aan). Sleep Cycle en Fitbit hebben deze slaap niet kunnen registreren, dus er is dit keer een wat groter verschil in de eN3 en totale slaaptijd volgens de apps. 

Oura 70 minuten

Sleep Cycle 35 minuten

Fitbit 41 minuten

iHealth 69 minuten

Sleep, Sound & Wind Log #61

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-11
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 22m
* **MainSleep_TotalSleep_SleepCycle_min** 4h 43m
* **MainSleep_TotalSleep_Fitbit_min** 4h 41m
* **MainSleep_TotalSleep_iHealth_min** 6h 24m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 70m
* **MainSleep_eN3_SleepCycle_min** 35m
* **MainSleep_eN3_Fitbit_min** 41m
* **MainSleep_eN3_iHealth_min** 69m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 55 dB
* **MainSleep_LZeq_End_dB** 67 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** S 
* **MainSleep_WindSpeed_Start** 7 Kt
* **MainSleep_WindDirection_End** S
* **MainSleep_WindSpeed_End** 11 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 12 maart

Oura 63 minuten

Sleep Cycle 35 minuten

Fitbit 62 minuten

iHealth 63 minuten

Sleep, Sound & Wind Log #62

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-12
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 50m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 24m
* **MainSleep_TotalSleep_Fitbit_min** 6h 14m
* **MainSleep_TotalSleep_iHealth_min** 5h 52m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 63m
* **MainSleep_eN3_SleepCycle_min** 35m
* **MainSleep_eN3_Fitbit_min** 62m
* **MainSleep_eN3_iHealth_min** 63m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 60 dB
* **MainSleep_LZeq_End_dB** 61 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** W
* **MainSleep_WindSpeed_Start** 8 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 9Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 13 maart

Gisteravond vergeten de geluidsmeters aan te zetten dus de genoteerde gegevens zijn dit keer op basis van historische data (het lokale weerbericht van gisteravond) en een geluidsmeting direct na het ontwaken.

Het is deze nacht flink gaan waaien, maar mijn slaap was ondanks wat onrustige momenten (de wind was duidelijk hoorbaar) toch redelijk goed. Oura registreerde 70 minuten diepe slaap en een totale slaapduur van 6 uur.

De eN3 volgens de apps:

Oura 70 minuten

Sleep Cycle 45 minuten

Fitbit 53 minuten

iHealth 70 minuten

Sleep, Sound & Wind Log #63

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-13
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 1m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 29m
* **MainSleep_TotalSleep_Fitbit_min** 6h 37m
* **MainSleep_TotalSleep_iHealth_min** 6h 4m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 70m
* **MainSleep_eN3_SleepCycle_min** 45m
* **MainSleep_eN3_Fitbit_min** 53m
* **MainSleep_eN3_iHealth_min** 70m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 63 dB
* **MainSleep_LZeq_End_dB** 74 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 9 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 17 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 14 maart

De batterij van mijn Fitbit horloge bleek leeg te zijn. En de geluidsmeters bleken niet aan te staan, dus de vermelde decibellen zijn benaderingen op basis van de windsnelheid deze avond en ochtend.

De eN3 volgens de andere  apps:

Oura 44 minuten

Sleep Cycle 39 minuten

iHealth 43 minuten

Sleep, Sound & Wind Log #64

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-14
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 22m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 30m
* **MainSleep_TotalSleep_Fitbit_min** h m
* **MainSleep_TotalSleep_iHealth_min** 6h 46m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 44m
* **MainSleep_eN3_SleepCycle_min** 39m
* **MainSleep_eN3_Fitbit_min** m
* **MainSleep_eN3_iHealth_min** 43m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 62 dB
* **MainSleep_LZeq_End_dB** 54 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 7 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 5 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT

No Fitbit data for this night.
---

*****

De ochtend van 15 maart

Oura 56 minuten

Sleep Cycle 56 minuten

Fitbit 52 minuten

iHealth 45 minuten

Sleep, Sound & Wind Log #65

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-15
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 23m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 38m
* **MainSleep_TotalSleep_Fitbit_min** 6h 30m
* **MainSleep_TotalSleep_iHealth_min** 6h 1m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 56m
* **MainSleep_eN3_SleepCycle_min** 56m
* **MainSleep_eN3_Fitbit_min** 52m
* **MainSleep_eN3_iHealth_min** 45m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 50 dB
* **MainSleep_LZeq_End_dB** 51 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 3 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 4 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 16 maart

Oei!

De batterij van mijn Fitbit Charge was opnieuw op.

Het hoorbare en niet-hoorbare geluid nam tussen half één en half twee flink toe door plotseling aanzwellende wind (15 knopen volgens Windy). Hierna daalde het infrasone geluid juist (9 knopen bij het defintieve ontwaken).

De eN3 volgens de apps:

Oura 40 minuten

Sleep Cycle 56 minuten

iHealth 38 minuten

Sleep, Sound & Wind Log #66

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-16
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 41m
* **MainSleep_TotalSleep_SleepCycle_min** 6h 23m
* **MainSleep_TotalSleep_Fitbit_min** h m
* **MainSleep_TotalSleep_iHealth_min** 5h 44m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 40m
* **MainSleep_eN3_SleepCycle_min** 56m
* **MainSleep_eN3_Fitbit_min** m
* **MainSleep_eN3_iHealth_min** 38m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 68 dB
* **MainSleep_LZeq_End_dB** 60 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 11 Kt
* **MainSleep_WindDirection_End** W
* **MainSleep_WindSpeed_End** 9 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT

No Fitbit data for this night.

Oura's Symptom Radar warned about "major signs" that something is straining my body. I'm not aware of anything being wrong. No health problems (no flu or anything like that), and feeling happy.
---

*****

De ochtend van 17 maart

Overdag (in de middag) een dutje van 90 minuten gedaan, met eN3.

De totale eN3 volgens de apps:

Oura 58 + 23 minuten = 81 minuten

Sleep Cycle 37 + 10 minuten = 47 minuten

Fitbit 64 minuten

iHealth 59 + 9 minuten = 68 minuten

Hieronder eerst alle gegevens van de nacht:

En alle gegevens van het dutje:

Sleep, Sound & Wind Log #67

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-17
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 1
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 4h 58m
* **MainSleep_TotalSleep_SleepCycle_min** 5h 31m
* **MainSleep_TotalSleep_Fitbit_min** 4h 52m
* **MainSleep_TotalSleep_iHealth_min** 5h 5m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 58m
* **MainSleep_eN3_SleepCycle_min** 37m
* **MainSleep_eN3_Fitbit_min** 64m
* **MainSleep_eN3_iHealth_min** 59m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min** 1h 26m
* **Nap_TotalSleep_SleepCycle_min** 1h 29m

* **Nap_TotalSleep_iHealth_min** 1h 31m
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min** 23m
* **Nap_eN3_SleepCycle_min** 10m

* **Nap_eN3_iHealth_min** 9m
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 61 dB
* **MainSleep_LZeq_End_dB** 61 dB
### Nap
* **Nap_LZeq_Start_dB** 54 dB
* **Nap_LZeq_End_dB** 56 dB
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SW
* **MainSleep_WindSpeed_Start** 7 Kt
* **MainSleep_WindDirection_End** S
* **MainSleep_WindSpeed_End** 8 Kt
### Nap
* **Nap_WindDirection_Start** S
* **Nap_WindSpeed_Start** 6 Kt
* **Nap_WindDirection_End** S
* **Nap_WindSpeed_End** 6 Kt
---
## NOTES & CONTEXT
---

*****

De ochtend van 18 maart

Oura 57 minuten

Sleep Cycle 18 minuten

Fitbit 49 minuten

iHealth 54 minuten

Sleep, Sound & Wind Log #68

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-18
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 5h 34m
* **MainSleep_TotalSleep_SleepCycle_min** 5h 59m
* **MainSleep_TotalSleep_Fitbit_min** 5h 55m
* **MainSleep_TotalSleep_iHealth_min** 5h 35m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 57m
* **MainSleep_eN3_SleepCycle_min** 18m
* **MainSleep_eN3_Fitbit_min** 49m
* **MainSleep_eN3_iHealth_min** 54m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 66 dB
* **MainSleep_LZeq_End_dB** 68 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SE
* **MainSleep_WindSpeed_Start** 6 Kt
* **MainSleep_WindDirection_End** SE
* **MainSleep_WindSpeed_End** 7 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 19 maart

Een relatief goede slaap, zowel wat het doorslapen betreft (circa 7 uur zonder lange onderbreking) als de hoeveelheid eN3. De geluidsdruk daalde deze nacht naar 52 dBZ, wat een bevestiging lijkt van mijn hypothese, al ben ik erg terughoudend geworden om op basis van de huidige meetgegevens conclusies te trekken. Het Ardennen-experiment zal uitwijzen of de geluidsdruk werkelijk relevant is.

De eN3 volgens de apps:

Oura 72 minuten

Sleep Cycle 34 minuten

Fitbit 71 minuten

iHealth 73 minuten

Sleep, Sound & Wind Log #69

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-19
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 49m
* **MainSleep_TotalSleep_SleepCycle_min** 7h 0m
* **MainSleep_TotalSleep_Fitbit_min** 7h 17m
* **MainSleep_TotalSleep_iHealth_min** 6h 56m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 72m
* **MainSleep_eN3_SleepCycle_min** 34m
* **MainSleep_eN3_Fitbit_min** 71m
* **MainSleep_eN3_iHealth_min** 73m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 62 dB
* **MainSleep_LZeq_End_dB** 55 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** SE
* **MainSleep_WindSpeed_Start** 5 Kt
* **MainSleep_WindDirection_End** E
* **MainSleep_WindSpeed_End** 2 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 20 maart

Opnieuw 7 uur aan één stuk geslapen, en een nog hogere eN3 score dan gisteren! Geluidsdruk de hele nacht rond de 58 dBZ.

Oura 84 minuten

Sleep Cycle 49 minuten

Fitbit 74 minuten

iHealth 83 minuten

Sleep, Sound & Wind Log #70

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-20
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 41m
* **MainSleep_TotalSleep_SleepCycle_min** 7h 15m
* **MainSleep_TotalSleep_Fitbit_min** 7h 4m
* **MainSleep_TotalSleep_iHealth_min** 6h 48m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 84m
* **MainSleep_eN3_SleepCycle_min** 49m
* **MainSleep_eN3_Fitbit_min** 74m
* **MainSleep_eN3_iHealth_min** 83m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 58 dB
* **MainSleep_LZeq_End_dB** 58 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** NE
* **MainSleep_WindSpeed_Start** 5 Kt
* **MainSleep_WindDirection_End** NE
* **MainSleep_WindSpeed_End** 5 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 21 maart

Een erg korte slaap na twee dagen vrij intensief werken, met volgens Oura hoge stressniveaus in de avonden. Nu een lang weekend om uit te rusten en hopelijk weer beter te slapen.

Oura: 50 minuten

Sleep Cycle: 23 minuten

Fitbit: 41 minuten

iHealth: 50 minuten

Sleep, Sound & Wind Log #71

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-21
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 4h 32m
* **MainSleep_TotalSleep_SleepCycle_min** 4h 48m
* **MainSleep_TotalSleep_Fitbit_min** 4h 39m
* **MainSleep_TotalSleep_iHealth_min** 4h 35m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 50m
* **MainSleep_eN3_SleepCycle_min** 23m
* **MainSleep_eN3_Fitbit_min** 41m
* **MainSleep_eN3_iHealth_min** 50m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 51 dB
* **MainSleep_LZeq_End_dB** 51 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** NE
* **MainSleep_WindSpeed_Start** 3 Kt
* **MainSleep_WindDirection_End** NE
* **MainSleep_WindSpeed_End** 3 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 22 maart

43

32

46

Sleep, Sound & Wind Log #72

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-22
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 59m
* **MainSleep_TotalSleep_SleepCycle_min** 7h 28m
* **MainSleep_TotalSleep_Fitbit_min** 7h 25m
* **MainSleep_TotalSleep_iHealth_min** 6h 57m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 43m
* **MainSleep_eN3_SleepCycle_min** 32m
* **MainSleep_eN3_Fitbit_min** 46m
* **MainSleep_eN3_iHealth_min** 43m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 64 dB
* **MainSleep_LZeq_End_dB** 65 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** NE
* **MainSleep_WindSpeed_Start** 6 Kt
* **MainSleep_WindDirection_End** E
* **MainSleep_WindSpeed_End** 6 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 23 maart

Het werd deze nacht zo goed als windstil. Geluidsdrukte bereikte een ondergrens van 48 dBZ!

Gewekt door de krantenbezorger van de buurvrouw, maar in principe na voldoende te hebben geslapen: circa 7 uur waarvan zo'n 70 minuten diepe slaap.

Oura 73 minuten

Sleep Cycle 42 minuten

Fitbit 75 minuten

iHealth 72 minuten

Tussen 01:00 en 03:00, de meest windstille periode, toch nog een vrij aanwezig geluid rond de 15 Hz:

Sleep, Sound & Wind Log #73

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-23
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 6h 53m
* **MainSleep_TotalSleep_SleepCycle_min** 7h 11m
* **MainSleep_TotalSleep_Fitbit_min** 7h 3m
* **MainSleep_TotalSleep_iHealth_min** 7h 2m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 73m
* **MainSleep_eN3_SleepCycle_min** 42m
* **MainSleep_eN3_Fitbit_min** 75m
* **MainSleep_eN3_iHealth_min** 72m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 56 dB
* **MainSleep_LZeq_End_dB** 50 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** E
* **MainSleep_WindSpeed_Start** 4 Kt
* **MainSleep_WindDirection_End** SE
* **MainSleep_WindSpeed_End** 0 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****

De ochtend van 24 maart

De nacht begon stil, maar de wind en geluidsdruk namen flink toe.

Oura 50 minuten

Sleep Cycle 31 minuten

Fitbit 68 minuten

iHealth 49 minuten

Sleep, Sound & Wind Log #74

## DATE & IDENTIFIERS
* **Date_morning_ISO** (YYYY-MM-DD) 2026-03-24
* **Nap_index** (0 = no nap, 1 = first nap, 2 = second nap, etc.) 0
---
## MAIN SLEEP (night preceding Date_morning)
### Total Sleep Duration
* **MainSleep_TotalSleep_Oura_min** 7h 12m
* **MainSleep_TotalSleep_SleepCycle_min** 7h 48m
* **MainSleep_TotalSleep_Fitbit_min** 7h 37m
* **MainSleep_TotalSleep_iHealth_min** 7h 20m
### Deep Sleep (eN3)
* **MainSleep_eN3_Oura_min** 50m
* **MainSleep_eN3_SleepCycle_min** 31m
* **MainSleep_eN3_Fitbit_min** 68m
* **MainSleep_eN3_iHealth_min** 49m
---
## NAPS (daytime)
### Total Sleep Duration
* **Nap_TotalSleep_Oura_min**
* **Nap_TotalSleep_SleepCycle_min**
### Deep Sleep (eN3)
* **Nap_eN3_Oura_min**
* **Nap_eN3_SleepCycle_min**
---
## SOUND PRESSURE LEVEL (Z-weighting)
### Main Sleep
* **MainSleep_LZeq_Start_dB** 51 dB
* **MainSleep_LZeq_End_dB** 64 dB
### Nap
* **Nap_LZeq_Start_dB**
* **Nap_LZeq_End_dB**
---
## WIND CONDITIONS
### Main Sleep
* **MainSleep_WindDirection_Start** NW
* **MainSleep_WindSpeed_Start** 0 Kt
* **MainSleep_WindDirection_End** SW
* **MainSleep_WindSpeed_End** 10 Kt
### Nap
* **Nap_WindDirection_Start**
* **Nap_WindSpeed_Start**
* **Nap_WindDirection_End**
* **Nap_WindSpeed_End**
---
## NOTES & CONTEXT
---

*****