AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency
"Bob Myers" wrote in message
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"Ron Baker, Pluralitas!" wrote in message
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First of all, do you think you could possibly learn to trim your posts?
No nonlinearity is necessary in order to hear
a beat?
Where does the beat come from?
An audible beat tone is produced by the constructive and destructive
interference between two sound waves in air. Look at a pictorial
representation (in the time domain) of the sum of sine waves,of similar
amplitudes, one at, say, 1000 Hz and the other at 1005, and you'll
see it.
Bob M.
How come you don't hear a 200 Hz beat
with a 1000 Hz tone and a 1200 Hz tone?
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