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Man with an NBC parabolic dish microphone used for recording distant sounds
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Man with an NBC parabolic dish microphone used for recording distant sounds

Harris & Ewing · 1931-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

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glass negativesunited states
Credit lineMan with an NBC parabolic dish microphone used for recording distant sounds. 1931-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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