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acoustic spectrography

noun
  1. a technique for analyzing sound by separating it into its component frequencies.
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Also called au·di·o·spec·trog·ra·phy [aw-dee-oh-spek-trog-ruh-fee] /ˌɔ di oʊ spɛkˈtrɒg rə fi/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018