A diagram to show the frequency ranges referred to by Mr. Bingham. The lowest arrows indicate the response of an ideal reproducer. The one above that of a good average instrument.
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Radio Record, Volume III, Issue 50, 27 June 1930, Page 30
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31A diagram to show the frequency ranges referred to by Mr. Bingham. The lowest arrows indicate the response of an ideal reproducer. The one above that of a good average instrument. Radio Record, Volume III, Issue 50, 27 June 1930, Page 30
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