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Spectrogram

visual representation of the spectrum of frequencies in a sound or other signal as they vary with time or some other variable. Typical representation: time on X-axis, frequency (Hz) on Y-axis, amplitude/volume as range of colors, red being loudest

Pronunciation
/ˈspɛktrəʊɡram/
/ˈspɛktrəˌɡræm/
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