Also look at the LMV1088

--- On Mon, 6/2/08, YAP <x112358@gmail.com> wrote:

From: YAP <x112358@gmail.com>
Subject: Re: [EE] Car door sound detection (clapper?) [AVR] too
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Date: Monday, June 2, 2008, 4:11 AM

On Sat, May 31, 2008 at 4:38 PM, M. Adam Davis <stienman@gmail.com> wrote:
> I need to detect a vehicle door closing from a device inside the
> vehicle.  This will be used to trigger a telemtry device, and must be
> installed by Your Grandma (TM) so it really can't be a switch and
> wiring to the device.
>
> Thus I'm trying to develop an algorithm that uses sound (via
> microphone) to detect likely door closing events.
>
> I haven't gone out with a recorder yet, but figuring out the
> difference between a cough and a door closing in a car with windows
> down does not seem trivial.
>
> I'm using the AVR32 UC3 devices, so I've got a bit of processing
power.
>
> What sound detection algorithms have you seen, or what ideas do you
> have (brainstorm on!) that I should look into?
>
> I'm also using other methods to trigger the device (light from the
> interior lighting, accelerometer, pressure, etc) but I'm primarily
> interested in exploring the sound detection in this particular thread.
>
> -Adam


Use an atmospheric  pressure sensor.

Cheers
/Ake


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