Changes

ResMed S9s, Philips Respironics System One CPAP and DeVilbiss IntelliPAP machines record snoring data. Fisher & Paykel Icons do not record snoring data.

CPAP machines do not have microphones attached to them. So your CPAP is not listening to the sound of your snoring. So how does it actually detect snoring? It analyzes the Flow Rate data.

Snoring data on a ResMed S9 is recorded as a function of time. At each time t, the machine assigns a "snore" number; SleepyHead graphs those "snore numbers." Here is the same Snore graph of the same 30 minutes of sleep displayed in both ResScan and SleepyHead.

'''Note:''' The S9 AutoSet and S9 VPAP Auto will react pretty aggressively to snoring. It is not uncommon to see substantial increases in pressure in response to snoring even if no OAs or Hs are being recorded.

Snoring on an IntelliPAP is recorded as a graph with respect to time in SleepyHead. But the graph is a "square wave" graph rather than a curve. Here's a picture of a typical IntelliPAP Snore graph from SleepyHead:

'''Please note the following:''' The way snores are recorded on the ResMed S9 machines is very different than the way it is recorded on the Philips Respironics System One machines. This information applies only to the snore data recorded by the Philips Respironics System One machines and how that data is reported in both the SleepyHead and Encore software packages.

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SleepyHead 0.9.6 calculates the VSnore Index shown in the left sidebar of the Daily Details data as follows: