MALE_FEMALE_VOICE_SWITCH

Published:2009/6/30 1:39:00 Author:May | From:SeekIC

Circuit developed by NASA engineers to improve intelligibility of voice communication during Apollo moon shots passes only the three portions of the speech spectrum required for clear speech:300-400 Hz and 2500-3000 Hz for both sexes and 900-1700Hz for males or t 100-1900 Hz for females. Pot ad lusts null to about 600 Hz. Circuit improves readabilhy of weak DX voice signals in noise.-J. Fisk, Circuits and Techniques, Ham Radio, June 1976, p 48-52.



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