3 ms·
I have my doubts that humans can hear above 20kHz. It's more likely that the sound produced by those devices, even if ultrasonic, may produce intermodulations
by crististm 10y ago
I have my doubts that humans can hear above 20kHz.
It's more likely that the sound produced by those devices, even if ultrasonic, may produce intermodulations in the audible range.
- mschuster91 10y ago28 kHz is in fact correct, although only in lab conditions: > The commonly stated range of human hearing is 20 Hz to 20 kHz. Under ideal laboratory conditions, humans can hear sound as low as 12 Hz and as high as 28 kHz, though the threshold increases sharply at 15 kHz in adults, corresponding to the last auditory channel of the cochlea. (ref: https://en.wikipedia.org/wiki/Hearing_range https://en.wikipedia.org/wiki/Hearing_range)