TESTING SOUND WAVES
Ray Kulz blows his trumpet, Jimmy Noel strums his guitar and George Macdonald strikes the cymbal into an OSCILLOSCOPE to see if sound waves vary. Very much so
Picture No
13992002
Media ID
45175894
Size
4599px x 5341px
(1.8MB)
Credit
Mary Evans Picture Library
Source
Unattributed photograph for Barnaby's Studios Ltd
Date
1930s
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