2006-08-31 20:29:54 · 5 answers · asked by ogiwrgos 2 in Science & Mathematics ➔ Other - Science
I saw this on Mythbusters. It actually does but the echo occurs so quickly that humans can't hear it.
2006-08-31 20:33:04 · answer #1 · answered by Precious 7 · 1⤊ 0⤋
I am not sure of the above replies! The sound that "echoes" does not go "so fast" for humans not to hear it. It does not make sense.
The sound travels in the air at a given speed (~360m/s). When it hits a reflective surface (reflective for sound, of course), it bounces back.
The point to consider is the "frequency" of the sound (the number of "waves" per second), as well as it "shape": we sound with sine waves and multiple harmonics, while other "devices", including the duck, output a signal that is NOT sinusoidal, but closer to a square wave.
Square waves do NOT reflect very well, so the echo of the duck does not come back very well... but it still does.
2006-08-31 22:24:40 · answer #2 · answered by just "JR" 7 · 0⤊ 0⤋
Mythbusters said there is echo, but it cannot be distinguished from its source sound for some odd reason.
2006-09-02 22:57:53 · answer #3 · answered by Anonymous · 0⤊ 0⤋
in the right place it does
2006-08-31 23:11:39 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It does actually but it does it so fast humans can't hear it.
2006-08-31 21:00:48 · answer #5 · answered by Anonymous · 0⤊ 0⤋