Abstract
IT is strange that in text-books dealing with the practical applications of our knowledge of sound, each author considers it necessary to employ a special vocabulary to describe sound phenomena, and each author employs a different one. This monograph provides an illustration, for the first part of it is devoted to well-known theories of the propagation and production of the various types of waves, which are described in a new nomenclature. Theory is then somewhat abruptly set aside and a description of practical technique is commenced. This part of the book is much more helpful, for it describes work carried out in Germany which had for its object the prevention of noise with moving machinery, and the insulation of other portions of a building from such noise. The work of Sabine and Watson on the acoustics of buildings is touched upon, but the list of absorption coefficients given is not up-to-date. Sound-signalling, including the effect of wind, sound-ranging and direction finding are also described, the work of the Danish and German artillery sections providing most of the material. The final section deals with the work of Miller in the United States on the analysis of sounds produced by musical instruments and by the human voice.
Die Schalltechnik.
Dr.
Richard
Berger
Von. (Sammlung Vieweg, Heft 83.) Pp. iv + 115. (Braunschweig: Friedr. Vieweg und Sohn A.-G., 1926.) 8 gold marks.
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Die Schalltechnik . Nature 117, 619 (1926). https://doi.org/10.1038/117619c0
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DOI: https://doi.org/10.1038/117619c0