Effect of the Acoustic Reflex on the Spondee Threshold
Autor: | James M. McDonald, Hayes A. Newby |
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Rok vydání: | 1980 |
Předmět: |
Adult
Male Physics medicine.medical_specialty Adolescent Pure tone Ear Middle Auditory Threshold Spondee Stimulus (physiology) Audiology Reflex Acoustic Speech and Hearing Threshold shift Otorhinolaryngology Reflex medicine Humans Female medicine.symptom Acoustic reflex Hearing Disorders Muscle Contraction Muscle contraction |
Zdroj: | Ear and Hearing. 1:215-218 |
ISSN: | 0196-0202 |
DOI: | 10.1097/00003446-198007000-00007 |
Popis: | To determine the effects of the intra-aural muscle reflex on the spondee threshold, 12 normal-hearing adults were tested monaurally with two contralaterally presented stimuli, a 2000 Hz pure tone and a broad-band noise, at two presentation levels: -10 dB and +10 dB re each subject's acoustic reflex threshold for each stimulus. The mean spondee threshold in the +10 dB condition was significantly higher than the mean spondee threshold in the -10 dB condition for both contralateral stimuli. Although some threshold shift in the presence of the +10 dB contralateral broad-band noise was no doubt due to overmasking, it is believed that one-half of the shift occurring with the +10 dB pure-tone stimulus were the result of the contraction of the intra-aural muscles. This presumption is supported by data collected on patients with unilateral anacusis. |
Databáze: | OpenAIRE |
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