What seems like a rather strange title has a very serious background.
I an looking for a contactless method of detecting Sleep apnea - this is when breathing stops for a while
So one need to detect a snoore ends then time the it takes for the start of next snore - This time would be then checked against a
value for an alarm.
The main problem is what mictophone to use , how to define a snoore start and stop....ie no false readings though cars/motorbikes etc.
I realise this a has it drawbacks but The person involved dislikes being connected to any devices...so a pure acoustic method must be used.
Any advice on this please?