The lady said she should still hear 20k, and none of us guys could hear any sound at all with the 20k tone, even right next to the speaker. We had no way to verify ...
12000-hz-sound
Jul 13, 2018 — According to Coren, when sounds are between 3,000 and 12,000 Hz in frequency, dogs' ears are far more sensitive than ours. They can hear .... Good human ears can detect sound from about 50 Hz to about 20,000 Hz (20 kHz); this ... person is able to detect may be about 15,000Hz or even 12,000Hz. 939c2ea5af
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