Biomedical subjects

L J Denenberg

Publications and source records attributed to L J Denenberg.

3 recordsLinked to original sources

PubMed1987

Interaural attenuation for tubephone insert earphones.

Interaural attenuation of pure tone and speech signals was evaluated for a new audiometric insert earphone, the ER-3A tubephone, and a conventional TDH-49P supra-aural earphone in seven unilaterally deaf adult subjects. These results validate and extend the interaural attenuation data reported by the manufacturer of the ER-3A and his associates. At frequencies of 0.5 to 1 kHz, mean interaural attenuation for the deeply inserted ER-3A decreased from 94+ dB to 81 dB, with the lowest value for any subject, 75 dB. Interaural attenuation for speech approximated that of the 1 to 2 kHz frequency range. The ER-3A tubephone provides significantly greater acoustic isolation between the two ears in the low-mid frequency audiometric range than the conventional supra-aural earphone.

Adult↗

PubMedDate not supplied

The clinical relationship between acoustic reflexes and loudness perception.

Speech-elicited acoustic reflexes and three measures of subjective loudness perceptions were administered to 10 normal ears and to 20 ears with confirmed sensorineural hearing loss. Most notable was the comparison between loudness discomfort level and the acoustic reflex, revealing a limited relationship. The use of the acoustic reflex as a clinical predictor of loudness discomfort is questioned.

Adult↗

PubMedDate not supplied

Effects of subtle mid-frequency auditory dysfunction upon speech discrimination in noise.

Earlier studies have indicated mid-frequency auditory dysfunction and depressed ability to discriminate speech in noise among noise-exposed listeners with high-frequency hearing loss. The present study was designed to determine whether mid-frequency dysfunction contributed to the depressed speech discrimination performance. Normal listeners, and noise-exposed and older listeners with high-frequency hearing loss listened to word lists presented in competing 'cocktail party' noise under unfiltered and low-pass filter conditions. In the low-pass filter condition the performance of the noise-exposed listeners was superior to that normal listeners, indicating that mid-frequency auditory dysfunction on the part of noise-exposed listeners does not contribute to their difficulties discriminating unfiltered speech in noise. The performance of the older listeners was below that of the two other groups in both filtered and unfiltered conditions, indicating greater difficulty discriminating speech than would be predicted only on the basis of high-frequency hearing loss.

Adult↗