Detection of amplitude distortion by normal hearing and hearing impaired subjects

Cover of: Detection of amplitude distortion by normal hearing and hearing impaired subjects |

Published by Karolinska Institutet, Technical Audiology in Stockholm .

Written in English

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Edition Notes

This report appears simultaneously as report 77:105 in "Forskningsrapporter fraan Audioogiska Avdelingen, Sahlgrenska sjukhuset, Göteborg".

Book details

StatementAlf Gabrielsson.. [et al.].
SeriesReport TA -- No.83
ContributionsGabrielsson, Alf.
The Physical Object
Pagination[29] p.
Number of Pages29
ID Numbers
Open LibraryOL21032531M

Download Detection of amplitude distortion by normal hearing and hearing impaired subjects

This study assessed the effect of cochlear hearing loss on detection of random and sinusoidal amplitude modulation. Listeners with hearing loss and normal-hearing listeners (eight per group) generated temporal modulation transfer functions (TMTFs) for envelope fluctuations carried by a Hz pure tone.

TMTFs for the two groups were similar at low modulation rates but diverged at higher rates Cited by: 3. The loudness recruitment associated with cochlear hearing loss increases the perceived amount of amplitude modulation (AM), called “fluctuation strength.” For normal-hearing (NH) subjects, fluctuation strength “saturates” when the AM depth is high.

If such saturation occurs for hearing-impaired (HI) subjects, they may show poorer AM depth discrimination than NH subjects when the Cited by:   / A comparison of transient-evoked and distortion product otoacoustic emissions in normal-hearing and hearing-impaired subjects.

In: Journal of the Acoustical Society of America. ; Vol. 94, No. Cited by: Detection of Hearing Impairment with the Acoustic Stapedius Reflex Article Literature Review (PDF Available) in Ear and Hearing 14(1) March with Reads How we measure 'reads'Author: Robert Margolis.

Audibility and recognition of stop consonants in normal and hearing-impaired subjects Article (PDF Available) in The Journal of the Acoustical Society of America 81(5) June with In the hearing-impaired subjects the signal level was set to 20 dB above their ASSR-stimulus behavioral threshold (dB SL) as the amplitude intensity function for normally hearing and hearing-impaired subjects shows rapid growth in response amplitude once ASSR threshold is exceeded in hearing-impaired subjects (Picton ).

Therefore lower. DPOAE amplitude and DPOAE/noise measurements were able to distinguish between normal and impaired subjects at, and, to a lesser extent, at Hz. The ability of these measures to distinguish between groups decreased, however, as frequency and audiometric criterion used to separate normal and hearing-impaired ears by: Objectives: To compare the distortion product otoacoustic emission amplitudes between normal hearing male and female subjects.

Methods: A total of 20 subjects of both sexes, aged between 18 and 25 years, mean 22 years, were studied. Inclusion criteria were normal otoscopic and tympanoscopic findings, and pure tone threshold of. This highly anticipated work is the complete, one-stop guide to hearing aids, covering everything you need to know to prescribe, select, fit, measure, and evaluate their performance.

Dillon is a sought-after speaker and instructor throughout the world. Some of the benefits of this acclaimed text: COMPREHENSIVE--From basic concepts of hearing loss, hearing aid software and hardware, to 4/5(3). separately or simultaneously. Normal-hearing and hearing-impaired subjects participated.

For each masking condition, the subjects were tested at masker lev 60, 70, and 80 dB SPL and at test-tone frequencies1, 2, and 4 kHz. Normal-hearing subjects showed reduced masking with spectral and temporal gaps. The combination of spectral File Size: 1MB. subjects with normal hearing and one subject with mild hear-ing loss suggested that DPOAEs can provide indirect mea-sures that are at least qualitatively similar to what has been observed in lower animals ~Neely et al., !.

It is useful to consider responses from normal and impaired human ears in. The bilaterally hearing-impaired listeners sometimes showed fission boundaries within the normal range, and sometimes showed larger than normal fission boundaries.

These results indicate that factors other than overlap of excitation patterns must influence streaming for sequences of pure by: thresholds for detection of these bands in a group of normal-hearing subjects. The sound pressure level of each band at threshold repre-sented 0 dB sensation level for the speech sig-nal or 0 dB HL since a group of normal listeners were used.

By then presenting. The current study investigates to which extent another capability of the auditory system supports the idea of a higher cochlear sensitivity in regions with hearing threshold fine structure. Amplitude modulation detection thresholds (MDTs) were measured in subjects with and without fine : M.

Mauermann, S. Heise, J. Verhey, B. Kollmeier. The absolute threshold of hearing (ATH) is the minimum sound level of a pure tone that an average human ear with normal hearing can hear with no other sound present.

The absolute threshold relates to the sound that can just be heard by the organism. The absolute threshold is not a discrete point, and is therefore classed as the point at which a sound elicits a response a specified percentage.

Grose JH, Eddins D, Hall JW () Gap detection as a function of stimulus band-width with fixed high-frequency cutoff in normal-hearing and hearing-impaired listeners. J Acoust Soc Am –Cited by: In case of central hearing loss, a PTA can indicate normal hearing, but a person can still have difficulty understanding speech, particularly in background noise, making it difficult to hold a conversation.

Thus, there is a need to use tests that evaluate the auditory system more comprehensively, from the cochlea to the higher auditory pathways. The Fletcher - Munson Equal Loudness curves (Graph 1) and later the Robinson - Dadson Equal Loudness Curves (Graph 3) are but two examples of research into the response of the ear/brain system to pure tones, in this case at varying loudness levels (with loudness being expressed in phons).

Year: | Volume: 3 | Issue: 12 | Page: Detection and clinical diagnosis of noise-induced hearing loss by otoacoustic emissions: Joseph Attias 1, Gil Horovitz 2, Nariman El-Hatib 3, Benny Nageris 4 1 Institute for Clinical Neurophysiology and Audiology, Schneider Children's Medical Center of Israel, Petah Tiqva, Israel 2 Institute for Noise Hazards Research, Israel Defence Forces.

The results were interpreted as suggesting noise-induced distortion in the temporal encoding of sounds in a normal hearing population (Kumar et al., ); however, as noted by Plack et al. (), it is possible that thresholds in the train drivers and the controls were different as Kumar et al.

() only document that hearing sensitivity Cited by: that only 21% of the hearing-impaired population (i.e., people reporting a hearing dif-ficulty) owned a hearing aid (calculated from Duijvesteijn, ).

An American study reported a similar situation: in the market penetration of hearing aids was lim-ited to only 20% of the total American hearing-impaired population (Kochkin, ). -hearing loss interferes with the natural acquisition of speech and language by interrupting the imitative process-hearing loss in infants is often undetected due to lack of parent follow up-babbling occurs up to 6 months of age-after 6th month children with impaired auditory.

The two-component aspect of hearing loss (audibility and distortion), which was formalized into a framework in past literature, is presented in the context of speech recognition. The differences between speech recognition in quiet and in background noise are discussed as they relate to listeners with normal hearing and listeners with hearing loss.

AN ABSTRACT OF THE THESIS OF Barry Lynn Kimmel for the Master of Science in Speech presented August 7, Title: An Investigation of Between-Ear Tympanometry Measures in Nonnal-Hearing Young Adults. APPROVED BY MEMBERS OF THE THESIS COMMITTEE. Twenty-two ears of 20 subjects with normal hearing and 29 ears of 25 subjects with hearing loss participated in these studies.

The two subject groups differed in age, with the normal-hearing subjects being younger ~mean years, s.d years. than the group of subjects with hearing loss ~mean years, s.d years!. It was. The degree of hearing loss is expressed by the difference between a person’s threshold and the average threshold for people with normal sensitivity.

For example, persons with mild hearing loss have thresholds that are 25 to 40 dB higher than the thresholds for those with normal hearing when tested using different at several frequencies.

Research Article The Relevance of the High Frequency Audiometry in Tinnitus Patients with Normal Hearing in Conventional Pure-Tone Audiometry VeronikaVielsmeier, 1 AstridLehner, 2 JürgenStrutz, 1 ThomasSteffens, 1 r, 2 MartinSchecklmann, 2 MichaelLandgrebe, 2,3 BertholdLangguth, 2 andTobiasKleinjung 1,4 Department of Otorhinolaryngology, University of Regensburg, Regensburg.

6). A second reason is that the use of high gain for very the hearing - impaired person’s perception of loudness more low - level inputs can make microphone noise or low - level like that of a normal - hearing listener [ 34 ].

Since loudness environmental noise appear intrusive. Indeed, for input lev - J. Audio Eng. The normal-hearing test subjects showed similar discrimination performance with the T, W, and N-type simulated pinna cues, as expected.

However, the results for the hearing-impaired test subjects showed only marginally lower MAAs with the W and T-cues compared to the N-cues, while the.

The detection is performed using the change of the overall sound pressure level with respect to time as a feature, and its performance and latency are affected by the length of temporal integration.

To keep the performance with short latency, an amplitude follower is applied. Keywords: Hearing assistive eyeglasses, Detection and direction Author: Ki-Won Kim, Jung-Woo Choi, Yang-Hann Kim.

Learn hearing loss with free interactive flashcards. Choose from different sets of hearing loss flashcards on Quizlet. An ubiquitous finding in cognitive aging research is a reduction in the speed of perceptual and mental processing with advancing age [].

In fact, when reaction times are used to study the "timeliness" in cognitive functions, seniors are, on average, slower than younger adults, irrespective of the tasks or the experimental procedure (Baron and Cerella,as cited in Kemmer et al.

[7]). Musiek F and Baran, J: Distortion product otoacoustic emissions: Hit and False Positive Rates in Normal hearing and hearing-impaired subjects. The American Journal of Otology,Musiek F and Lee W: The Auditory Brainstem Response in Patients with Brainstem and Cochlear Pathology.

Ear and Hearing;16(6), Assessment of listeners with normal hearing and with hearing loss on this test demonstrates that it has high content validity, good sensitivity, and a large number of equivalent forms.

An abbreviated test of speech in noise (SIN test) (Etymotic Research, ) presents high- and low-level sentences to listeners at four S/B ratios. Perez-Abalo MC, Savio G, Torres A, Martín V, Rodríguez E, Galán L. Steady state responses to multiple amplitude-modulated tones: an optimized method to test frequency-specific thresholds in hearing-impaired children and normal-hearing subjects.

Ear Hear. ; [ Links ] Mean overall DPOAEs amplitude of normal hearing ears is greater than 6 dB SPL, showing greater peaks at kHz and kHz. DPOAEs can be recorded across a frequency range from to 8 kHz (3). It is well established that OHCs are extremely vulnerable to sound over-stimulation and are the first to be affected amongst the inner ear cells (4).

In normal hearing and hearing impaired subjects, temporal resolution can be characterized by the temporal modulation transfer function (TMTF) which relates the threshold for detecting changes in the amplitude of a sound to the rapidity of changes/modulation frequency (Bacon and Viemeister, ; Burns and Viemeister, ; Moore and Glasberg Cited by: 6.

Hearing loss, also known as hearing impairment, is a partial or total inability to hear. A deaf person has little to no hearing. Hearing loss may occur in one or both ears. In children, hearing problems can affect the ability to learn spoken language and in adults it can create difficulties with social interaction and at work.

In some people, particularly older people, hearing loss can result Complications: Loneliness. Effects of Auditory and Visual Distracters on Acceptable Background Noise Level in Hearing-Impaired Listeners Elizabeth A. Ripley A dissertation submitted to the Graduate Faculty of JAMES MADISON UNIVERSITY In Partial Fulfillment of the Requirements for the degree of Doctor of Audiology Communication Sciences and Disorders May !.

""!!Author: Elizabeth A. Ripley. The decibel originates from methods used to quantify reductions in audio levels in telephone circuits. These losses were originally measured in units of Miles of Standard Cable (MSC), where 1 MSC corresponded to the loss of power over a 1 mile (approximately km) length of standard telephone cable at a frequency of radians per second ( Hz), and roughly matched the.

used for sevea of the eight hearing-impaired subjects. The subjects listened to the lists at the 0 + 5 dB they *Were expected to obtú nearly % at 10 dB SNR and above. To determine the appropriate SNRs to ase for testing the hearing-impaired subjects, two half-bbcks of the SIN test were administered to each subject.Physiology, Psychoacoustics and Cognition in Normal and Impaired Hearing Pim van Dijk, Deniz Başkent, Etienne Gaudrain, Emile de Kleine, Anita Wagner, Cris Lanting (eds.) The International Symposium on Hearing is a prestigious, triennial gathering where world-class scientists present and discuss the most recent advances in the field of.

Your question can be answered easily by a web search which will return images and instructional materials for speech therapists and audiologists in training.

The usual way human hearing range is expressed is between 20 Hertz Hertz for.

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