scholarly journals Real-World Performance of a Reverse-Horn Vent

2005 ◽  
Vol 16 (09) ◽  
pp. 653-661
Author(s):  
Francis Kuk ◽  
Denise Keenan ◽  
Chi-Chuen Lau ◽  
Nick Dinulescu ◽  
Richard Cortez ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
Objective Measures ◽  
Subjective Ratings ◽  
High Frequency Hearing Loss ◽  
Speech In Noise ◽  
Objective Performance ◽  
Occlusion Effect

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.

scholarly journals Vent Configurations on Subjective and Objective Occlusion Effect

2005 ◽  
Vol 16 (09) ◽  
pp. 747-762 ◽  
Author(s):  
Francis Kuk ◽  
Denise Keenan ◽  
Chi-Chuen Lau
Keyword(s):  
Hearing Aids ◽  
High Frequency ◽  
Response Variability ◽  
Subjective Rating ◽  
Systematic Change ◽  
Subjective Ratings ◽  
High Frequency Hearing Loss ◽  
Custom Made ◽  
Study Participants ◽  
Occlusion Effect

The current study reexamined the effect of vent diameters on objective and subjective occlusion effect (OE) while minimizing two possible sources of variability. Nine hearing-impaired participants with primarily a high-frequency hearing loss were evaluated. Laser shell-making technology was used to make ear inserts of completely-in-the-canal (CIC) hearing aids for the study. This was to minimize any potential slit leakage from the inserts. The vent dimensions were systematically altered during the study. Participants sustained /i/ for 5 sec, and the real-ear occluded response was measured with a custom-made program that performed frequency averaging to reduce response variability. Participants also repeated the phrase "Baby Jeannie is teeny tiny" and rated their own voice. The results showed a systematic change in the objective OE and subjective ratings of OE as the vent diameter was modified. Furthermore, a significant correlation was seen between subjective rating and objective occlusion effect.

Modified Earpieces and CROS for High Frequency Hearing Losses

1968 ◽  
Vol 11 (1) ◽  
pp. 204-218 ◽  
Author(s):  
Elizabeth Dodds ◽  
Earl Harford
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
Hearing Aid ◽  
Sound Field ◽  
Intensity Level ◽  
Test Results ◽  
High Frequency Hearing Loss ◽  
Increased Sensitivity ◽  
Difficult Cases

Persons with a high frequency hearing loss are difficult cases for whom to find suitable amplification. We have experienced some success with this problem in our Hearing Clinics using a specially designed earmold with a hearing aid. Thirty-five cases with high frequency hearing losses were selected from our clinical files for analysis of test results using standard, vented, and open earpieces. A statistical analysis of test results revealed that PB scores in sound field, using an average conversational intensity level (70 dB SPL), were enhanced when utilizing any one of the three earmolds. This result was due undoubtedly to increased sensitivity provided by the hearing aid. Only the open earmold used with a CROS hearing aid resulted in a significant improvement in discrimination when compared with the group’s unaided PB score under earphones or when comparing inter-earmold scores. These findings suggest that the inclusion of the open earmold with a CROS aid in the audiologist’s armamentarium should increase his flexibility in selecting hearing aids for persons with a high frequency hearing loss.

Tinnitus Suppression Effect of Hearing Aids in Patients With High-frequency Hearing Loss

2019 ◽  
Vol 40 (7) ◽  
pp. 865-871 ◽  
Author(s):  
Natalia Yakunina ◽  
Woo Hyun Lee ◽  
Yoon-Jong Ryu ◽  
Eui-Cheol Nam
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
High Frequency Hearing Loss ◽  
Suppression Effect

Hearing aids for high-frequency hearing loss

1990 ◽  
Vol 15 (4) ◽  
pp. 321-326
Author(s):  
J. E. DAVIES ◽  
D. G. JOHN ◽  
M. J. JONES
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
High Frequency Hearing Loss

scholarly journals Comparison of Frequency Transposition and Frequency Compression for People With Extensive Dead Regions in the Cochlea

2019 ◽  
Vol 23 ◽  
pp. 233121651882220 ◽  
Author(s):  
Marina Salorio-Corbetto ◽  
Thomas Baer ◽  
Brian C. J. Moore
Keyword(s):  
Hearing Loss ◽  
Outcome Measures ◽  
Hearing Aids ◽  
High Frequency ◽  
Test Sentence ◽  
High Frequency Hearing Loss ◽  
Frequency Compression ◽  
Perceived Benefit ◽  
Consistent Error ◽  
And Control

The objective was to determine the effects of two frequency-lowering algorithms (frequency transposition, FT, and frequency compression, FC) on audibility, speech identification, and subjective benefit, for people with high-frequency hearing loss and extensive dead regions (DRs) in the cochlea. A single-blind randomized crossover design was used. FT and FC were compared with each other and with a control condition (denoted ‘Control’) without frequency lowering, using hearing aids that were otherwise identical. Data were collected after at least 6 weeks of experience with a condition. Outcome measures were audibility, scores for consonant identification, scores for word-final /s, z/ detection ( S test), sentence-in-noise intelligibility, and a questionnaire assessing self-perceived benefit (Spatial and Qualities of Hearing Scale). Ten adults with steeply sloping high-frequency hearing loss and extensive DRs were tested. FT and FC improved the audibility of some high-frequency sounds for 7 and 9 participants out of 10, respectively. At the group level, performance for FT and FC did not differ significantly from that for Control for any of the outcome measures. However, the pattern of consonant confusions varied across conditions. Bayesian analysis of the confusion matrices revealed a trend for FT to lead to more consistent error patterns than FC and Control. Thus, FT may have the potential to give greater benefit than Control or FC following extended experience or training.

Hearing Aid Use with Minimal High-Frequency Hearing Loss

1989 ◽  
Vol 100 (2) ◽  
pp. 154-157 ◽  
Author(s):  
Carissa D. Bennett
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
Hearing Aid ◽  
Hearing Threshold ◽  
Social Situations ◽  
High Frequency Hearing Loss ◽  
Hearing Aid Use ◽  
Listening Environments ◽  
Worthwhile Investment

This Study evaluated the use of hearing aids by patients with hearing threshold levels of 20 dB or less at 500 and 1000 Hz and 35 dB or less at 2000 Hz. Ninety-eight patients completed a 30-day trial with amplification. Six months later, patients were interviewed by telephone and questioned on hearing aid use and perceived unaided and aided difficulty in various listening environments. Results of the study demonstrated that patients with minimal high-frequency hearing loss can benefit from the use of hearing aids. Ninety-two percent of the patients elected to purchase the hearing aids and 85% considered the aids a worthwhile investment after 6 months of use. Patients showed a mean improvement from moderate unaided to slight aided difficulty at work and in general social situations. The only variable that predicted success with hearing aids was degree of unaided difficulty at work. Patients who perceived less unaided difficulty at work were less likely to obtain benefit from the use of the hearing aids.

Measuring the Long-Term SNRs of Static and Adaptive Compression Amplification Techniques for Speech in Noise

2013 ◽  
Vol 24 (08) ◽  
pp. 671-683 ◽  
Author(s):  
Ying-Hui Lai ◽  
Pei-Chun Li ◽  
Kuen-Shian Tsai ◽  
Woei-Chyn Chu ◽  
Shuenn-Tsong Young
Keyword(s):  
Hearing Loss ◽  
High Frequency ◽  
Dynamic Range ◽  
Wide Dynamic Range ◽  
High Frequency Hearing Loss ◽  
Digital Hearing Aids ◽  
Speech In Noise ◽  
Dynamic Range Compression ◽  
Adaptive Compression

Background: Multichannel wide-dynamic-range compression (WDRC) is a widely adopted amplification scheme in modern digital hearing aids. It attempts to provide individuals with loudness recruitment with superior speech intelligibility and greater listening comfort over a wider range of input levels. However, recent surveys have shown that compression processing (operating in the nonlinear regime) usually reduces the long-term signal-to-noise ratio (SNR). Purpose: The purpose of this study was to determine the long-term SNR in an adaptive compression-ratio (CR) amplification scheme called adaptive wide-dynamic-range compression (AWDRC), and to determine whether this concept is better than static WDRC amplification at improving the long-term SNR for speech in noise. Design and Study Sample: AWDRC uses the input short-term dynamic range to adjust the CR to maximize audibility and comfort. Various methods for evaluating the long-term SNR were used to observe the relationship between the CR and output SNR performance in AWDRC for seven typical audiograms, and to compare the results with those for static WDRC amplification. Results: The results showed that the variation of the CR in AWDRC amplification can maintain the comfort and audibility of the output sound. In addition, the average long-term SNR improved by 0.1–5.5 dB for a flat hearing loss, by 0.2–3.4 dB for a reverse sloping hearing loss, by 1.4–4.8 dB for a high-frequency hearing loss, and by 0.3–5.7 dB for a mild-to-moderate-sloping high-frequency hearing loss relative to static WDRC amplification. The output long-term SNR differed significantly (p < .001) between static WDRC and AWDRC amplification. Conclusions: The results of this study show that AWDRC, which uses the characteristics of the input signal to adaptively adjust the CR, provides better long-term SNR performance than static WDRC amplification.

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