J Am Acad Audiol 2005; 16(09): 653-661
DOI: 10.3766/jaaa.16.9.3
American Academy of Audiology. All rights reserved. (2005) American Academy of Audiology

Real-World Performance of a Reverse-Horn Vent

Francis Kuk
Denise Keenan
Chi-Chuen Lau
Nick Dinulescu
Richard Cortez
Patricia Keogh
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Publication History

Publication Date:
07 August 2020 (online)

The present study compared differences in subjective and objective performance in completely-in-the-canal (CIC) hearing aids with conventional uniform 1.5 mm parallel vents and another with a reverse horn vent where the diameter increased from 1.5 mm on the lateral faceplate to 3 mm on the medial opening of the hearing aid. Nine hearing-impaired persons with a high-frequency hearing loss participated. The test battery included unaided in situ thresholds, amount of available gain before feedback, speech in quiet, speech in noise (HINT), subjective ratings of hollowness and tolerance, objective measures of the occlusion effect, and real-ear aided response. Results showed less available gain before feedback but less occlusion effect for subjective ratings and objective measures with the reverse horn vent. This type of vent design may be useful to increase the effective vent diameter of custom (including CIC) hearing aids.