xcode - Voice Recording above particular Frequency for ios -

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now i'm working under voice analysis based project, in have record voice signal having frequency more 17000 hertz. below rate, signal should neglected. hope there voice filter record rate, if having ideas regarding means please assist me helpful me, thank you..

sounds me like implement high-pass filter.

the wikipedia page regarding these pretty thorough.

where got voice signal frequency components of on 17khz beyond me since human voice not capable of producing frequencies close 10khz.


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