[android-developers] How to filter sound frequency coming from Microphone?

I had submitted one subject,but can nof find it.So repet once again.

 

I want to develop one APP on android, record sound from mic, and only catch some frequency which users appoint. For example, I just wnat to record 10000-15000Hz voice.

 

I check the android Media api, and can not find way to filter the frequency. could anybody give some ideas?

 

Regards

Martin Hood.

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