movies
SoundWavesAn
ERPI Classroom Films, Inc. Distributed by Encyclopedia Britannica
Sources of sounds and characteristics of sound waves, shown by means of oscilloscopes and animated diagrams.
1933
http://creativecommons.org/licenses/publicdomain/
B&W
sound
prelinger
Sound Waves And Their Sources
0
9:38
2005-01-13 09:36:44
AV Geek Skip
1
0
need keyword
3375
MovingImage
1933
SoundWavesAn
2007-03-01 15:31:34