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Mar
10
comment Do all organisms have to die?
It too will die when the sun becomes a red giant.
Jan
22
comment Can humans perceive sounds above 20 kHz?
The last time I had it working I was about 16. That hardware is broken and the replacement couldn't go high enough to repeat the test.
Jan
22
comment Can humans perceive sounds above 20 kHz?
Digital frequency generator at constant volume. Kept on increasing frequency until I couldn't hear it. Generator was rated for 32khz.
Jan
22
comment Can humans perceive sounds above 20 kHz?
Yes. I personally used to top out at 22-23khz.