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I use Arduino and piezo on the plank under the mattress: https://files.catbox.moe/y6ehk6.gif https://files.catbox.moe/y6ehk6.gif

by dvh 3y ago

FirmwareBurner 3y ago
But what does that tell you about your sleep cycles and sleep quality? It just shows you moving around in bed.
- dariosalvi78 3y ago
  Sleep cycles are very hard to measure reliably, basically no wrist worn device should be trusted for that.
  - cj 3y ago
    I find wrist sleep apps accurate enough for showing me trends over time and correlations between things that make sleep worse (e.g. drinking before bed shows different sleeping patterns than not drinking). Interesting and useful data but I agree it's not scientifically precise.
    - dariosalvi78 3y ago
      I agree, which is why I think that it would be more interesting, and probably more honest, to show some sort of "sleep quality" index instead.
- cj 3y ago
  Isn't "movement in bed" how all sleep monitors work? (aside from the clinical test with electrodes stuck to your head) I always assumed the main metric used by sleep apps for watches is movement.
  - FirmwareBurner 3y ago
    >Isn't "movement in bed" how all sleep monitors work? No. The best ones monitor your brainwaves, and the best wearables monitor the next best ting, your hear rate and blood oxygen. You can get knocked out by drugs, alcohol or just die in your sleep from apnea so you'll not move around in bed and your bed motion sensors are useless. You need to tap into the body's vital signs to know your sleep stages accurately, especially REM.
    - cj 3y ago
      For anyone interested in how Apple Watch measures sleep stages, here's a deep dive that goes into details about how the accelerator is used to estimate respiration rate, etc in order to classify sleep stages https://www.apple.com/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf https://www.apple.com/healthcare/docs/site/Estimating_Sleep_...

I use Arduino and piezo on the plank under the mattress: https://files.catbox.moe/y6ehk6.gif https://files.catbox.moe/y6ehk6.gif

by dvh 3y ago

I use Arduino and piezo on the plank under the mattress: https://files.catbox.moe/y6ehk6.gif https://files.catbox.moe/y6ehk6.gif

FirmwareBurner 3y ago

But what does that tell you about your sleep cycles and sleep quality? It just shows you moving around in bed.

dariosalvi78 3y ago
Sleep cycles are very hard to measure reliably, basically no wrist worn device should be trusted for that.
- cj 3y ago
  I find wrist sleep apps accurate enough for showing me trends over time and correlations between things that make sleep worse (e.g. drinking before bed shows different sleeping patterns than not drinking). Interesting and useful data but I agree it's not scientifically precise.
  - dariosalvi78 3y ago
    I agree, which is why I think that it would be more interesting, and probably more honest, to show some sort of "sleep quality" index instead.
cj 3y ago
Isn't "movement in bed" how all sleep monitors work? (aside from the clinical test with electrodes stuck to your head) I always assumed the main metric used by sleep apps for watches is movement.
- FirmwareBurner 3y ago
  >Isn't "movement in bed" how all sleep monitors work? No. The best ones monitor your brainwaves, and the best wearables monitor the next best ting, your hear rate and blood oxygen. You can get knocked out by drugs, alcohol or just die in your sleep from apnea so you'll not move around in bed and your bed motion sensors are useless. You need to tap into the body's vital signs to know your sleep stages accurately, especially REM.
  - cj 3y ago
    For anyone interested in how Apple Watch measures sleep stages, here's a deep dive that goes into details about how the accelerator is used to estimate respiration rate, etc in order to classify sleep stages https://www.apple.com/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf https://www.apple.com/healthcare/docs/site/Estimating_Sleep_...