Sound Waves and Their Sources (second edition)

Duration: 360 ft.

Year Published: 1950

Creator: Encyclopaedia Britannica Educational Corp.

Complete Record: Explains that all sound originates in vibrating objects, and illustrates the three general types of vibrating sound sources: columns of air, surfaces, and strings and rods. Describes the major characteristics of sound waves - loudness, pitch, and quality - and demonstrates the principal auditory differences between sounds.

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