In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 28, No. 4_Supplement ( 1956-07-01), p. 761-761
Abstract:
This method makes use of the fact that the voiced portion of a speech signal is very nearly periodic in time, the period being the inverse of the fundamental frequency. If a periodic wave is delayed by exactly one period and then subtracted from the original wave, the result is zero. If the delay is other than a multiple of the period, the result is in general not zero. To implement this principle, speech is passed through a tapped delay line and the output of each tap is subtracted from the undelayed signal. If the voltages thus obtained are time averaged and then scanned, a wave results which shows a null at the tap corresponding to the period. In the case of unvoiced sounds a null will not appear, so that voiced and unvoiced sounds can be differentiated.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1956
detail.hit.zdb_id:
1461063-2
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