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Third grade science Lifepac 6

Across
American scientist who invented the phonograph
System which uses underwater sound waves
Part of ear which vibrates when sound enters
Italian scientist who studied pitch
A steel instrument used to produce a tone of a particular pitch
Sound waves above the level of human hearing
The amount of energy a given sound has
Part of inner ear which looks like a snail
Down
To move back and forth quickly
Caused by vibrations
Number of vibrations in a second
Study of sound and its effect on people
Created by irregular sound waves
Place in body where the human voice is produced