Hi Alison, This is certainly possible. The challenge is to distinguish ambient noise from conversations and avoiding positive feedback loops. Good filter algorithms are mandatory.
IVI currently uses a much simpler but mostly adequate solution. For decades car radios have been equipped with an input for the alternator's speed signal. The faster the engine cranks the higher the frequency of the signal. Nowadays cars have digital instruments for engine rev and vehicle speed and the IVI systems get the data through the vehicle buses and adjust volume accordingly. It is an excellent example how sensor signals combinef with policies will affect audio management in a car. Rudi On Nov 30, 2010 3:36 PM, <[email protected]> wrote: One lingering question I have from the Sensor Framework MeeGoCon presentation is about the possible use of the microphone as a sensor. The use of an ambient light sensor to adjust screen brightness is often mentioned, but I've never heard anyone mention the related idea of adjusting audio volume based on ambient noise. I particularly like the idea for the IVI environment. I suppose that there could be privacy concerns with turning the microphone on at random times, but if it's just for a millisecond, the potential for snooping on the user is minimal. >From the point of view of Tracker/Zeitgeist and the Context Framework, there are many more subtle applications for ambient noise sensing like figuring out if the device owner is alone or in a conversation. -- Alison Chaiken Nokia Mobility Solutions [email protected] 650-279-5600 http://www.exerciseforthereader.org/ _______________________________________________ MeeGo-dev mailing list [email protected] http://lists.meego.com/listinfo/meego-dev
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