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Which is the maximum frequency of a speaker of any common mobile phone? I would like to use sound to repel some animals, so I need playback sampling rate to be above 44100 Hz.

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    $\begingroup$ If you want to have your mobile phone emit a sound at frequencies above the range of human hearing in order to repel animals, you might want to first consider the limitations of the loudspeaker built into the phone. $\endgroup$ – Dilip Sarwate Mar 31 '12 at 13:44
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    $\begingroup$ This is a product specification question (ask the manufacturers), not a DSP question. $\endgroup$ – hotpaw2 Mar 31 '12 at 16:53
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    $\begingroup$ It's more likely that the DAC applies filters which force output within the audible spectrum. Your speaker might very well have the ability to produce frequencies higher than this, it's just likely that the audio hardware connected to it will filter this out by default. $\endgroup$ – Matt Esch Apr 1 '12 at 8:38
  • $\begingroup$ Which sounds repel which animals, exactly? Is this effect based in reality or are you just assuming that products which claim this effect actually work? $\endgroup$ – endolith Apr 6 '12 at 16:02
  • $\begingroup$ minimum 20 Hz......And Maximum 20000.... So Minimum use A Hear phone. ... $\endgroup$ – muzaffar Quraishi Apr 19 '18 at 3:16
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The native sampling frequency of iOS devices is 44100 Hz, while Android devices can operate at either 8, 16, 24, 44.1 or 48 kHz. Support of all of these depends on Android device manufacturer, however most Android support all of them.

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