MEASURING NOISE
The power of speech and other noises were dealt with scientifically in an interesting lecture that was delivered in London recently. At the Royal Institution Dr G. W. C. Kaye, superintendent of the physics department of the National Physical Laboratory, spoke on the measurement of noise and the effect of noise on different people. Concerning the quantity of energy in sounds Dr Kaye~~said:—"A crowd of 100,000 at the Wembley Stadium, all talking continuously and rather loudly, would provide as much speech power as would provide
would, if converted, light a small electric light throughout a football match. By the end of the game the accoustical energy expended would have been sufficient, if transformed into heat, to make one cup of tea. Explaining that the " yardstick " or " degree" by which noise is measured is the decibel (a power-ratio, or log-arithmetic unit), Dr Kaye gave the following examples of noise measurements : Conversation 50 A quiet street 30 Lions roaring 85 Niagara Falls 85 Aeroplane engine 110 z" Twins crying together are only three decibels louder than one crysolo," added the lecturer.
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Waipa Post, Volume 43, Issue 3342, 29 August 1931, Page 2
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181MEASURING NOISE Waipa Post, Volume 43, Issue 3342, 29 August 1931, Page 2
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