"A visual record of the frequency spectrum of a sound on a time-scale (obtained form an audiospectrograph)." 
"correctly used not for [audiospectrum], but for the graph of its variation with time." 
- . The Songs of the Grasshoppers and Crickets of Western Europe. Colchester, Essex: Harley Books; 1998.
- Clé de citation (citekey) 5780 non trouvée
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