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Science 13 October 1995:
Vol. 270. no. 5234, pp. 303 - 304
DOI: 10.1126/science.270.5234.303
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Reports

Speech Recognition with Primarily Temporal Cues

Robert V. Shannon (1),  Fan-Gang Zeng,  Vivek Kamath,  John Wygonski,  Michael Ekelid

Nearly perfect speech recognition was observed under conditions of greatly reduced spectral information. Temporal envelopes of speech were extracted from broad frequency bands and were used to modulate noises of the same bandwidths. This manipulation preserved temporal envelope cues in each band but restricted the listener to severely degraded information on the distribution of spectral energy. The identification of consonants, vowels, and words in simple sentences improved markedly as the number of bands increased; high speech recognition performance was obtained with only three bands of modulated noise. Thus, the presentation of a dynamic temporal pattern in only a few broad spectral regions is sufficient for the recognition of speech.

House Ear Institute, 2100 West Third Street, Los Angeles, CA 90057, USA.  
(1) To whom correspondence should be addressed. 


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