Loudness Discomfort Level and Acoustic Reflex Threshold for Speech Stimuli Loudness discomfort level (LDL) and acoustic reflex threshold (ART) measurements were obtained from subjects with normal hearing using several speech stimuli, as well as broad-band and speech-spectrum noise. The purpose of the investigation was to determine the LDL for a variety of representative speech samples, and to determine the relationship ... Research Article
Research Article  |   December 01, 1979
Loudness Discomfort Level and Acoustic Reflex Threshold for Speech Stimuli
 
Author Affiliations & Notes
  • Donald E. Morgan
    UCLA School of Medicine, Los Angeles, California
  • Donald D. Dirks
    UCLA School of Medicine, Los Angeles, California
  • Deborah Bower
    UCLA School of Medicine, Los Angeles, California
  • Candace A. Kamm
    UCLA School of Medicine, Los Angeles, California
Article Information
Research Articles
Research Article   |   December 01, 1979
Loudness Discomfort Level and Acoustic Reflex Threshold for Speech Stimuli
Journal of Speech, Language, and Hearing Research, December 1979, Vol. 22, 849-861. doi:10.1044/jshr.2204.849
History: Received March 3, 1978 , Accepted February 26, 1979
 
Journal of Speech, Language, and Hearing Research, December 1979, Vol. 22, 849-861. doi:10.1044/jshr.2204.849
History: Received March 3, 1978; Accepted February 26, 1979

Loudness discomfort level (LDL) and acoustic reflex threshold (ART) measurements were obtained from subjects with normal hearing using several speech stimuli, as well as broad-band and speech-spectrum noise. The purpose of the investigation was to determine the LDL for a variety of representative speech samples, and to determine the relationship between the LDL and ART for selected speech and noise stimuli. For all stimuli, LDL measurements were relatively constant, but ART measurements decreased significantly for wide-band noise stimuli as compared with the speech stimuli. Mean differences between the two measures were consistent, but individual subject data were characterized by wide variability precluding accurate prediction of the LDL from ART measurements.

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