[Transmission of speech sounds by hearing aids (author's transl)].
Oscillograms and sonagrams demonstrate some changes of speech sounds due to transmission by hearing aids. Most important are: cut off at low and high frequencies, internal noise of the hearing aid and variations of transients. The influence on speech discrimination and subjective satisfaction is discussed. A consequence of low frequency cut off is the loss of the first vocal formants and the loss of most important parts of oral occlusives /m/ and /n/; the cut off at high frequencies diminishes the information of some fricatives. The internal noise of the hearing aid may have a masking effect on important components of fricatives, Observed temporal variations in transients are too small to deteriorate phonem identification.
D006309:Hearing; D006310:Hearing Aids / Q000295:instrumentation; D006801:Humans; D010700:Phonetics; D013016:Sound; D013018:Sound Spectrography
Zur Ubertragung von Sprache durch Hörgeräte.