An instrument for analysing sound into its frequency components.
- The sound spectrograph (developed by Koenig in the 1940s) made it possible to study speech acoustic events in greater detail and revealed phoneme-specific information in the acoustic patterns.
- The invention of the sound spectrograph made visual comparisons of similar sounds possible, and the perfection of magnetic tape and taperecording devices made archiving of sounds a reality.
- Analysis with the sound spectrograph showed that this tooting put the major emphasis on the third harmonic.
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