Abstract
THIS is the first comprehensive text to appear on a subject which the public is rather apt to take very much for granted, the microphone-amplifier-loudspeaker combination, the correct and original description of which is the public-address system. There is little theory which can be said to belong to the subject, except the simple calculations associated with decibels, transformers, and the power-handling capacity of power-valves. the author concentrates on the practical side, perhaps too much, with rather crude descriptions of standard types of microphones and loudspeakers. Nevertheless, he does give a very good picture of the importance of the subject and the extent of its applications.
The Amplification and Distribution of Sound
A. E.
Greenlees
By. Pp. 254. (London: Chapman and Hall, Ltd., 1938.) 10s. 6d. net.
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H., L. Physics. Nature 144, 197 (1939). https://doi.org/10.1038/144197d0
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DOI: https://doi.org/10.1038/144197d0