An Investigation of Temporary Threshold Shift Caused by Hearing Aid Use

1994 ◽  
Vol 37 (1) ◽  
pp. 227-237 ◽  
Author(s):  
John H. Macrae
Keyword(s):  
Mathematical Model ◽  
Hearing Loss ◽  
Hearing Aid ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Hearing Aid Use ◽  
Gain Reduction ◽  
The Mathematical Model ◽  
Békésy Audiometry ◽  
Modified Power Law

Temporary threshold shift (TTS) caused by hearing aid use was measured by Bekesy audiometry in a group of individuals with severe sensorineural hearing loss. The accuracy with which a mathematical model consisting of the Modified Power Law (MPL) (Humes & Jesteadt, 1991) combined with equations for predicting TTS in normal listeners (Mills, Gilbert, & Adkins, 1979) could predict the TTS was evaluated. When the exponent of the MPL was set to 0.15, the predicted TTS was significantly greater than the observed TTS at two out of six frequencies. When the exponent was increased to 0.20, there were no significant differences between the predictions and the observations. With this value of the exponent, the mathematical model was able to predict the observed TTS as accurately as it could be measured. The MPL was used to derive safety limits for TTS, and gain reduction was recommended as the best method of reducing TTS to the safety limits.

Temporary Threshold Shift Caused by Hearing Aid Use

1993 ◽  
Vol 36 (2) ◽  
pp. 365-372 ◽  
Author(s):  
John H. Macrae
Keyword(s):  
Hearing Aids ◽  
Noise Exposure ◽  
Hearing Aid ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Noise Levels ◽  
Hearing Aid Use ◽  
Wide Range ◽  
The Mean ◽  
Modified Power Law

Temporary threshold shift (TTS) over a wide range of frequencies was found after 4 hours of hearing aid use by a 15-year-old student with severe sensorineural hearing loss who was using real-ear insertion gains 10 to 20 dB greater than those recommended by the current National Acoustic Laboratories (NAL) procedure for selecting the gain and frequency response of hearing aids. Measurements were made of her noise exposure during hearing aid use with a noise dosimeter. The real-ear insertion response and input-output function of her hearing aid were measured with a real-ear gain analyzer and were used to calculate in-ear noise levels from the noise levels measured by the dosimeter. The amount of TTS could be predicted from the in-ear noise levels and the student’s hearing levels (HLs) by means of a mathematical model consisting of the Modified Power Law (MPL) of Humes and Jesteadt (1991) combined with equations for predicting TTS in listeners with normal hearing published by Mills, Gilbert, and Adkins (1979). The mean of the instantaneous A-weighted in-ear noise levels proved to be the appropriate equivalent continuous level (ECL) for use in the predictions. The MPL was also used to determine safety limits for TTS due to hearing aid use. The observed TTS exceeded the safety limits at all frequencies up to and including 2000 Hz. It was therefore considered desirable for the girl to use less gain at frequencies from 500 to 1500 Hz.

Prediction of Asymptotic Threshold Shift Caused by Hearing Aid Use

1994 ◽  
Vol 37 (6) ◽  
pp. 1450-1458 ◽  
Author(s):  
John H. Macrae
Keyword(s):  
Hearing Aids ◽  
Pure Tone ◽  
Hearing Aid ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
High Input ◽  
Hearing Aid Use ◽  
Sound Levels ◽  
Ambient Sound ◽  
Ambient Levels

This study used a well-verified mathematical model to predict asymptotic temporary threshold shift (ATS) caused by hearing aid use. The model determined the amounts of ATS to be expected if real ear insertion gains (REIGs) recommended by the current National Acoustic Laboratories (NAL) procedure are used. It also determined the consequences of use of excess REIG and of high input levels to hearing aids. If recommended REIGs are used and input levels are normal (average A-weighted input levels of about 61 dB SPL), ATS is unlikely to occur for clients who have typical audiograms with three-frequency average pure-tone thresholds (PTAs) less than 60 dB HL. For people with PTAs greater than 60 dB HL, small amounts of ATS can be expected to occur during hearing aid use, but these amounts of ATS are safe, that is, unlikely to be associated with permanent threshold shift (PTS) for individuals with all PTAs except those greater than about 100 dB HL. If REIGs are 15 dB greater than those recommended, the amounts of ATS will be unsafe for people with PTAs greater than about 80 dB HL. It appears unwise for clients who have this degree of hearing loss to use excess REIG. The use of excess REIG in high ambient levels of sound (average A-weighted input levels of about 75 dB SPL) is likely to cause PTS for hearing aid users with PTAs of about 50 dB HL or greater. Clients who prefer to use excess REIG should therefore avoid high ambient sound levels. The amount of amplification required for people with PTAs greater than about 100 dB HL is likely to cause PTS and is therefore inherently unsafe.

Temporary and Permanent Threshold Shift Caused by Hearing Aid Use

1995 ◽  
Vol 38 (4) ◽  
pp. 949-959 ◽  
Author(s):  
John H. Macrae
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Sensorineural Hearing ◽  
Threshold Shift ◽  
Hearing Aid Use ◽  
Sound Levels ◽  
The Mean ◽  
Good Agreement

Excessive amplification by hearing aids causes temporary threshold shift (TTS) and permanent threshold shift (PTS). This investigation addressed the question whether it might be possible to predict the eventual amount of PTS caused by excessive amplification from the amount of TTS it causes after a day of hearing aid use. Asymptotic TTS (ATS) to be expected as a result of hearing aid use was predicted for 8 children with sensorineural hearing loss and the predicted ATS was compared with observed permanent deterioration of their thresholds attributed to hearing aid use. There was good agreement between the predicted ATS and observed PTS at 500 to 2000 Hz. It follows that, for prediction of PTS caused by hearing aid use, the mean of the sound levels produced in the ear by the hearing aid is the correct equivalent continuous level (ECL) to use and that the Modified Power Law (MPL) is the appropriate method of adjusting the predictions for sensorineural hearing loss, because these have been shown to be appropriate for prediction of TTS caused by hearing aid use. Predictions of the PTS to be expected for the children that were carried out using the MPL and the mean level as the ECL were in good agreement with the observed PTS at 500 to 2000 Hz, whereas predictions of PTS based on an alternative method of correction for sensorineural hearing loss (the Continuation Hypothesis) were significantly less than the observed amounts. The results of the PTS predictions therefore confirmed the conclusions drawn from the results of the ATS predictions.

Monitoring Progress for Children with Hearing Loss

2014 ◽  
Vol 24 (2) ◽  
pp. 74-81
Author(s):  
Monica Weston ◽  
Karen F. Muñoz ◽  
Kristina Blaiser
Keyword(s):  
Hearing Loss ◽  
Hearing Aid ◽  
Full Time ◽  
Data Logging ◽  
Standardized Measures ◽  
Word Structure ◽  
Hearing Aid Use ◽  
Outcomes For Children ◽  
Language Measures ◽  
Children With Hearing Loss

Purpose This study investigated average hours of daily hearing aid use and speech-language outcomes for children age 3 to 6 years of age with hearing loss. Method Objective measures of hearing aid use were collected via data logging. Speech and language measures included standardized measures GFTA-2, CELF Preschool-2 and additional item analyses for the word structure subtest CELF Preschool-2 and the GFTA-2. Results Hearing aid use was full time for 33% of the children (n=3; M=8.84 hours; Range: 2.9–12.1) at the beginning of the study, and for 78% at the end of the study (n=7; M=9.89 hours; Range 2.6–13.2). All participants demonstrated an improvement in articulation and language standard scores and percentiles however continued to demonstrate areas of weakness in sounds high-frequency in nature. Conclusions Through early identification and fitting, children gain access to speech sounds. Both standardized measures and individual language analysis should be used to identify and support children with hearing loss in language and subsequent literacy development.

On the Potential Deterioration in Hearing Due to Hearing Aid Usage

1981 ◽  
Vol 24 (1) ◽  
pp. 3-15 ◽  
Author(s):  
Larry E. Humes ◽  
Fred H. Bess
Keyword(s):  
Hearing Aid ◽  
Threshold Shift ◽  
Temporary Threshold Shift ◽  
Hearing Sensitivity

This manuscript examines the issue of potential decline in hearing sensitivity due to hearing aid usage through an analysis of data obtained from the temporary threshold shift (TTS) paradigm. Following a critique of the traditional measures of TTS, the concept of integrated TTS (ITTS) is reviewed and data on hearing-aid-induced ITTS are presented. In addition, a series of equations relating permanent threshold shift (PTS) to a recently developed measure of noise dose (Dn) is derived and predictions for hearing-aid-induced PTS are made. Recommended gain settings established to protect the hearing of a person wearing a hearing aid from further decline following various durations of hearing aid usage are also provided.

Hearing Technology Use and Management in School-Age Children: Reports from Data Logs, Parents, and Teachers

2017 ◽  
Vol 28 (10) ◽  
pp. 883-892 ◽  
Author(s):  
Samantha J. Gustafson ◽  
Todd A. Ricketts ◽  
Anne Marie Tharpe
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Parent Report ◽  
School Age Children ◽  
School Age ◽  
Data Logging ◽  
Hearing Aid Use ◽  
System Use ◽  
Children With Hearing Loss

Background: Consistency of hearing aid and remote microphone system use declines as school-age children with hearing loss age. One indicator of hearing aid use time is data logging, another is parent report. Recent data suggest that parents overestimate their children’s hearing aid use time relative to data logging. The potential reasons for this disparity remain unclear. Because school-age children spend the majority of their day away from their parents and with their teachers, reports from teachers might serve as a valuable and additional tool for estimating hearing aid use time and management. Purpose: This study expands previous research on factors influencing hearing aid use time in school-age children using data logging records. Discrepancies between data logging records and parent reports were explored using custom surveys designed for parents and teachers. Responses from parents and teachers were used to examine hearing aid use, remote microphone system use, and hearing aid management in school-age children. Study Sample: Thirteen children with mild-to-moderate hearing loss between the ages of 7 and 10 yr and their parents participated in this study. Teachers of ten of these children also participated. Data Collection and Analysis: Parents and teachers of children completed written surveys about each child’s hearing aid use, remote microphone system use, and hearing aid management skills. Data logs were read from hearing aids using manufacturer’s software. Multiple linear regression analysis and an intraclass correlation coefficient were used to examine factors influencing hearing aid use time and parent agreement with data logs. Parent report of hearing aid use time was compared across various activities and school and nonschool days. Survey responses from parents and teachers were compared to explore areas requiring potential improvement in audiological counseling. Results: Average daily hearing aid use time was ˜6 hr per day as recorded with data logging technology. Children exhibiting greater degrees of hearing loss and those with poorer vocabulary were more likely to use hearing aids consistently than children with less hearing loss and better vocabulary. Parents overestimated hearing aid use by ˜1 hr per day relative to data logging records. Parent-reported use of hearing aids varied across activities but not across school and nonschool days. Overall, parents and teachers showed excellent agreement on hearing aid and remote microphone system use during school instruction but poor agreement when asked about the child’s ability to manage their hearing devices independently. Conclusions: Parental reports of hearing aid use in young school-age children are largely consistent with data logging records and with teacher reports of hearing aid use in the classroom. Audiologists might find teacher reports helpful in learning more about children’s hearing aid management and remote microphone system use during their time at school. This supplementary information can serve as an additional counseling tool to facilitate discussion about remote microphone system use and hearing aid management in school-age children with hearing loss.

Hearing Loss, Control, and Demographic Factors Influencing Hearing Aid Use Among Older Adults

1998 ◽  
Vol 41 (3) ◽  
pp. 527-537 ◽  
Author(s):  
Dean C. Garstecki ◽  
Susan F. Erler
Keyword(s):  
Older Adults ◽  
Hearing Loss ◽  
Hearing Aids ◽  
Psychological Control ◽  
Hearing Aid ◽  
Demographic Factors ◽  
Ego Strength ◽  
Hearing Sensitivity ◽  
Hearing Aid Use ◽  
Hearing Handicap

Preference for non-use of hearing aids among older adults who are candidates for amplification remains to be explained. Clinical studies have examined the contribution of consumer attitudes, behaviors, and life circumstances to this phenomenon. The present study extends the interests of earlier investigators in that it examines psychological control tendencies in combination with hearing loss and demographic variables among older adults who elected to accept (adherents) or ignore (nonadherents) advice from hearing professionals to acquire and use hearing aids. One hundred thirty-one individuals participated by completing measures of hearing, hearing handicap, psychological control, depression, and ego strength. Participants were asked to provide demographic information and personal opinions regarding hearing aid use. Adherence group and gender differences were noted on measures of hearing sensitivity, psychological control, and demographic factors. Female adherents demonstrated greater hearing loss and poorer word recognition ability but less hearing handicap, higher internal locus of control, higher ego strength, and fewer depressive tendencies than female nonadherents. They reported demographic advantages. Female adherents assumed responsibility for effective communication. Although male adherents and nonadherents did not differ significantly demographically, male adherents were more accepting of their hearing loss, took responsibility for communication problems, and found hearing aids less stigmatizing. Implications for clinical practice and future clinical investigations are identified and discussed. Results are expected to be of interest to clinicians, clinical investigators, and health care policymakers.

scholarly journals Investigating the Impact of Hearing Aid Use and Auditory Training on Cognition, Depressive Symptoms, and Social Interaction in Adults With Hearing Loss: Protocol for a Crossover Trial (Preprint)

2017 ◽  
Author(s):  
Joanna Nkyekyer ◽  
Denny Meyer ◽  
Peter J Blamey ◽  
Andrew Pipingas ◽  
Sunil Bhar
Keyword(s):  
Hearing Loss ◽  
Depressive Symptoms ◽  
Social Interaction ◽  
Sensorineural Hearing Loss ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Sensorineural Hearing ◽  
Auditory Training ◽  
Face To Face ◽  
Hearing Aid Use

BACKGROUND Sensorineural hearing loss is the most common sensory deficit among older adults. Some of the psychosocial consequences of this condition include difficulty in understanding speech, depression, and social isolation. Studies have shown that older adults with hearing loss show some age-related cognitive decline. Hearing aids have been proven as successful interventions to alleviate sensorineural hearing loss. In addition to hearing aid use, the positive effects of auditory training—formal listening activities designed to optimize speech perception—are now being documented among adults with hearing loss who use hearing aids, especially new hearing aid users. Auditory training has also been shown to produce prolonged cognitive performance improvements. However, there is still little evidence to support the benefits of simultaneous hearing aid use and individualized face-to-face auditory training on cognitive performance in adults with hearing loss. OBJECTIVE This study will investigate whether using hearing aids for the first time will improve the impact of individualized face-to-face auditory training on cognition, depression, and social interaction for adults with sensorineural hearing loss. The rationale for this study is based on the hypothesis that, in adults with sensorineural hearing loss, using hearing aids for the first time in combination with individualized face-to-face auditory training will be more effective for improving cognition, depressive symptoms, and social interaction rather than auditory training on its own. METHODS This is a crossover trial targeting 40 men and women between 50 and 90 years of age with either mild or moderate symmetric sensorineural hearing loss. Consented, willing participants will be recruited from either an independent living accommodation or via a community database to undergo a 6-month intensive face-to-face auditory training program (active control). Participants will be assigned in random order to receive hearing aid (intervention) for either the first 3 or last 3 months of the 6-month auditory training program. Each participant will be tested at baseline, 3, and 6 months using a neuropsychological battery of computer-based cognitive assessments, together with a depression symptom instrument and a social interaction measure. The primary outcome will be cognitive performance with regard to spatial working memory. Secondary outcome measures include other cognition performance measures, depressive symptoms, social interaction, and hearing satisfaction. RESULTS Data analysis is currently under way and the first results are expected to be submitted for publication in June 2018. CONCLUSIONS Results from the study will inform strategies for aural rehabilitation, hearing aid delivery, and future hearing loss intervention trials. CLINICALTRIAL ClinicalTrials.gov NCT03112850; https://clinicaltrials.gov/ct2/show/NCT03112850 (Archived by WebCite at http://www.webcitation.org/6xz12fD0B).

scholarly journals Treatment of age-related hearing loss alters audiovisual integration and resting-state functional connectivity: A randomized controlled pilot trial

2021 ◽  
Author(s):  
Stephanie Rosemann ◽  
Anja Gieseler ◽  
Maike Tahden ◽  
Hans Colonius ◽  
Christiane Thiel
Keyword(s):  
Hearing Loss ◽  
Resting State ◽  
Hearing Aid ◽  
Brain Connectivity ◽  
Audiovisual Integration ◽  
Resting State Functional Connectivity ◽  
Functional Brain ◽  
Hearing Aid Use ◽  
Age Related ◽  
Age Related Hearing Loss

Untreated age-related hearing loss increases audiovisual integration and impacts resting state functional brain connectivity. It is unclear whether compensation with hearing aids is able to alter audiovisual integration and resting state functional brain connectivity. We conducted a randomized controlled pilot study to investigate how the McGurk illusion, a common measure for audiovisual integration, and resting state functional brain connectivity of the auditory cortex are altered by six-month hearing aid use. Thirty-two older participants with slight-to-moderate, symmetric, age-related hearing loss were allocated to a treatment or waiting control group and measured one week before and six months after hearing aid fitting with functional magnetic resonance imaging. Our results showed that a hearing aid use of six months was associated with a decrease in resting state functional connectivity between the auditory cortex and the fusiform gyrus and that this decrease was related to an increase of perceived McGurk illusions. Our study, therefore, suggests that even short-term hearing aid use alters audiovisual integration and functional brain connectivity between auditory and visual cortices.

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