acoustic phonetics

the branch of science dealing with the sounds of speech in terms of their frequency, duration, intensity, etc., especially as analyzed by means of instruments like the sound spectrograph and the oscillograph. Compare articulatory phonetics.
a composite branch of physics and linguistics that treats sound proper as it relates to speech.
the branch of phonetics dealing with the transmission of sounds to the ear and the reception of them by the ear prior to neurological processing.

1930–35 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
acoustic phonetics
(functioning as singular) auditory phonetics Compare articulatory phonetics the branch of phonetics concerned with the acoustic properties of human speech

Collins English Dictionary - Complete & Unabridged 10th Edition
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