Performance Characteristics for Hearing Aid Microphone Versus Telephone and Telephone/Telecoil Reception Modes

1983 ◽  
Vol 26 (2) ◽  
pp. 195-201 ◽  
Author(s):  
J. Curtis Tannahill
Keyword(s):  
Frequency Response ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Performance Characteristics ◽  
Reference Position ◽  
Response Characteristics ◽  
Frequency Response Characteristics ◽  
Selection Of

Two hearing aids and three telephone receivers were used to compare electroacoustic and word intelligibility data for hearing aid microphone reception versus telephone/telephone and telephone/telecoil reception. Measurements included test reference position gain and frequency response characteristics (Experiment 1) and word intelligibility scores (Experiment 2). The results indicated that performance was similar for hearing aid microphone reception and telephone/telephone reception. Telephone/ telecoil performance varied, depending on which telephone receiver was involved, but was poorer than hearing aid microphone performance. Recommendations were made concerning the selection of hearing aids and the management of hearing aid users relative to telephone/telecoil communication.

Frequency Response Characteristics of FM Mini-Loop Auditory Trainers

1980 ◽  
Vol 45 (2) ◽  
pp. 247-258 ◽  
Author(s):  
Dianne J. Van Tasell ◽  
Deborah P. Landin
Keyword(s):  
Frequency Response ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Microphone Signal ◽  
Response Characteristics ◽  
Amplification System ◽  
Frequency Response Characteristics ◽  
Signal Route ◽  
Public School Classroom ◽  
Performance Results

Personally sized inductance loops (mini-loops) now are available for use with an FM classroom amplification system and the student's personal ear-level hearing aid. Frequency response characteristics of five commercially-available hearing aids were assessed 1) using hearing aid test equipment available in most audiology clinics, with the hearing aid on microphone setting and 2) in a public school classroom, with the hearing aid on telecoil setting and operating with an FM mini-loop system. Clinic and classroom characteristics of the conventional FM receiver-insert earphone auditory trainers also were assessed. Results showed that the personal hearing aids' classroom performance could not be predicted from their clinic performance. Results also showed that gain provided by the environmental microphone circuit of the FM receiver-insert earphone units was uniformly higher than that provided by the teacher-microphone signal route.

The Effect of a Conventional Versus a Nonoccluding (CROS-Type) Earmold upon the Frequency Response of a Hearing Aid

1968 ◽  
Vol 11 (3) ◽  
pp. 638-647 ◽  
Author(s):  
David S. Green ◽  
Mark Ross
Keyword(s):  
Frequency Response ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Sound Field ◽  
Minor Effect ◽  
Low Frequencies ◽  
Response Characteristics ◽  
Different Types ◽  
A Minor ◽  
Békésy Audiometry

Sound-field Bekesy audiograms were obtained from one experienced hearing-impaired subject wearing an ear-level hearing aid with a conventional earmold and a nonoccluding CROS-type earmold. Comparisons were made to determine the effects of the two different types of earmolds as well as different tubing lengths for nonoccluding CROS-type earmolds. Findings indicate: (1) A nonoccluding CROS-type earmold alters the frequency response characteristics of a hearing aid by markedly reducing the amplification for the low frequencies. (2) The length of tubing has a minor effect compared with that caused by the nonoccluding CROS ear coupler. (3) Sound-field Bekesy audiometry is a reliable and valid tool for assessing changes in the amplifying characteristics of hearing aids.

Electroacoustic Performance Characteristics of FM Auditory Trainers

1980 ◽  
Vol 45 (1) ◽  
pp. 16-26 ◽  
Author(s):  
Barry A. Freeman ◽  
J. Stephen Sinclair ◽  
Donald E. Riggs
Keyword(s):  
Hearing Aids ◽  
Hearing Aid ◽  
Performance Characteristics ◽  
Volume Control ◽  
Modes Of Operation ◽  
Response Characteristics ◽  
Performance Differences ◽  
Transmission Modes

This study investigated the electroacoustic performance characteristics of FM auditory trainers. Experiment one was designed to answer two interrelated questions. First, what are the differences in the electroacoustic performance of FM auditory trainers between the FM and EM modes? Second, is the method for evaluating electroacoustic performance of hearing aids also appropriate for assessing the response characteristics of FM auditory trainers? The purpose of the second experiment was to assess the effect that taper of the volume control dial had on performance of these trainers. The study found that, with certain cautions, the ANSI S3.22-1976 procedures for assessing a hearing aid could be applied to the measurement of FM trainers. There were performance differences, however, between the auditory trainers when set to the FM and EM transmission modes. Thus, the electroacoustic assessment of FM units in both the EM and FM modes of operation is needed to assess their performance fully.

Feasibility of smartphone-based hearing-aid apps for patients with mild hearing loss: an exploratory pilot study (Preprint)

2020 ◽  
Author(s):  
Willy Nguyen ◽  
Miseung Koo ◽  
Seung Ha Oh ◽  
Jun Ho Lee ◽  
Moo Kyun Park
Keyword(s):  
Hearing Loss ◽  
Hearing Impairment ◽  
Hearing Aids ◽  
Clinical Performance ◽  
Hearing Aid ◽  
National Standards ◽  
Hearing In Noise ◽  
Mild Hearing Loss ◽  
Consumer Devices ◽  
Selection Of

BACKGROUND Underuse of hearing aids is caused by several factors, including the stigma associated with hearing disability, affordability, and lack of awareness of rising hearing impairment associated with the growing population. Thus, there is a significant opportunity for the development of direct-to-consumer devices. For the past few years, smartphone-based hearing-aid apps have become more numerous and diverse, but few studies have investigated them. OBJECTIVE This study aimed to elucidate the electroacoustic characteristics and potential user benefits of a selection of currently available hearing-aid apps. METHODS We investigated the apps based on hearing-aid control standards (American National Standards Institute) using measurement procedures from previous studies. We categorized the apps and excluded those we considered inefficient. We investigated a selection of user-friendly, low-end apps, EarMachine and Sound Amplifier, with warble-tone audiometry, word recognition testing in unaided and aided conditions, and hearing-in-noise test in quiet and noise-front conditions in a group of users with mild hearing impairment (n = 7) as a pilot for a future long-term investigation. Results from the apps were compared with those of a conventional hearing aid. RESULTS Five of 14 apps were considered unusable based on low scores in several metrics, while the others varied across the range of electroacoustic measurements. The apps that we considered “high end” that provided lower processing latencies and audiogram-based fitting algorithms were superior overall. The clinical performance of the listeners tended to be better when using hearing aid, while the low end hearing-aid apps had limited benefits on the users. CONCLUSIONS Some apps showed the potential to benefit users with limited cases of minimal or mild hearing loss if the inconvenience of relatively poor electroacoustic performance did not outweigh the benefits of amplification.

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