Abstract
IN recent work I have been assessing the loudness of certain noises by means of an audiometer of the type in which a note in a telephone earpiece over one ear is adjusted in loudness until it appears to be as loud as the noise observed by the other ear, or alternatively, is just masked by it. For general observations of everyday noise when the instrument is not at hand, I find it possible to use a tuning-fork on the same lines. The fork is struck in a standard manner, and note is made of the time which elapses before the loudness of the fork, when placed as close to the ear as possible with the flat of a prong facing the auditory meatus, falls to the loudness of the observed noise. The total interval which elapses before the fork is masked by the noise is also taken for check purposes.
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