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I am looking for a program for Microsoft Windows that can give a warning whenever a program emits ultrasounds. My use case is to detect advertisers hiding ultrasounds in their ads, so I would prefer the program to have an option to be a bit clever by judging which ultrasound looks suspicious.

Any price or license is fine.

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  • why not just use a high-Q lowpass filter to block ultrasound altogether?
    – Display Name
    Commented Jan 9, 2017 at 11:03
  • also, Tor browser bundle is based on Firefox and it has a hidden setting which disables ALL audio in browser.
    – Display Name
    Commented Jan 9, 2017 at 11:04
  • The OP didn't seem to want to block ultrasound, merely to identify its source - perhaps he's building a blacklist of infringing advertisers. I'm also almost certain he wants to only block selected ultrasound, rather than silence his browser entirely.
    – flith
    Commented Jan 11, 2017 at 21:26

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I think that the SilverDog chrome extension could well fit your user case - at the moment it is a proof of concept that blocks ultrasonic signals from your browser by placing a audio cut off filter in the audio path.

More details here.

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