Ipsilateral acoustic reflex thresholds at varying click rates in humans. 1995

V W Rawool
Communication Disorders and Special Education, Bloomsburg University, PA 17815, USA.

The effects of the click repetition rates on the ipsilateral acoustic reflex thresholds were investigated in 17 normal female subjects (total 34 ears) within the age-range of 20 to 26 years. The acoustic reflexes were elicited in response to condensation clicks (100 microseconds duration) at repetition rates of 50, 100, 150, 200, 250 and 300/sec. The probe tone frequency was 226 Hz and the intensity was 85dB SPL. The thresholds improved significantly with increase in the repetition rates. The mean threshold advantage was 11.2dB with an increase in the rate from 50 to 100/sec, it was 7.8dB when the rate was increased from 100 to 200/sec and was further reduced to 2.6dB when the rate was increased from 200 to 300/sec. These findings are discussed with reference to the temporal and the spatial summation and facilitation. Possible clinical implications of the findings are presented.

UI MeSH Term Description Entries
D012022 Reflex, Acoustic Intra-aural contraction of tensor tympani and stapedius in response to sound. Acoustic Reflex
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000158 Acoustic Impedance Tests Objective tests of middle ear function based on the difficulty (impedance) or ease (admittance) of sound flow through the middle ear. These include static impedance and dynamic impedance (i.e., tympanometry and impedance tests in conjunction with intra-aural muscle reflex elicitation). This term is used also for various components of impedance and admittance (e.g., compliance, conductance, reactance, resistance, susceptance). Audiometry, Impedance,Electroacoustic Impedance Tests,Impedance Tests, Acoustic,Tympanometry,Acoustic Impedance Test,Electroacoustic Impedance Test,Impedance Audiometry,Impedance Test, Acoustic,Impedance Test, Electroacoustic,Impedance Tests, Electroacoustic,Test, Acoustic Impedance,Test, Electroacoustic Impedance,Tests, Acoustic Impedance,Tests, Electroacoustic Impedance
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D001307 Auditory Perception The process whereby auditory stimuli are selected, organized, and interpreted by the organism. Auditory Processing,Perception, Auditory,Processing, Auditory
D001309 Auditory Threshold The audibility limit of discriminating sound intensity and pitch. Auditory Thresholds,Threshold, Auditory,Thresholds, Auditory
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor

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