phonometern.
/fə(ʊ)ˈnɒmᵻtə/, U.S. /foʊˈnɑmədər/ An instrument for measuring or automatically recording the intensity of sound.
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the world > matter > physics > science of sound > sound-waves > [noun] > instrument measuring number or pressure
phonometer1823
pistonphone1922
probe microphone1945
probe mike1976
1823 New Monthly Mag. 8 20 We should not be surprised to see this uncertainty brought, in time, under mathematical controul, by the invention of a musical Phonometer, to indicate the precise strength of sound.
1888 Appleton's Cycl. Amer. Biogr. II. at Edison, Thomas Alva The phonograph..and the phonometer and apparatus for measuring the force of sound-waves produced by the human voice, are inventions of this period.
1965 Jrnl. Appl. Physiol. 20 302/1 It was assumed that the changes of sound intensity, as given by the phonometer, were proportional to the changes of the intensity of the sound produced.
2005 Clin. Neurophysiol. 116 192/2 (note) The noise level..was measured with a phonometer (which integrates the sound energies of the environment over time).
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.1823