Sound Flashcards
1
Q
the formula for echo (distance)
A
2D=s*t
2
Q
infrasonic sound=
A
below 20Hz
3
Q
ultrasonic sound=
A
above 20,000Hz
4
Q
speed of sound in solids, liquids, gas
A
5000m/s, 1500m/s, 343m/s
5
Q
what is reverberation
A
multiple echoes at once
6
Q
what are seismic waves
A
these are waves that contain both longitudinal and transverse
7
Q
conditions for echoes
A
the minimum distance should be at least 17m
size of reflector should be larger than sounds wavelength
the intensity of sound reaching are should be audible
