Signal Perception in Noise Induced Hearing Loss
Circumscribed lesion of Corti's organ, like in cases of noise induced permanent threshold shift (NIPTS), influences speech discrimination only inasmuch as the sound level for optimal speech discrimination must be increased, whilst a discrimination loss not compensable by speech level increment is only correlated to the age of the patients. In cases of NIPTS, the difference limen for intensity is lowered within the region of 4 kHz in comparison to normal hearing ears, especially near hearing threshold, and this lowering is not correlated to age. By these findings, the wellknown difficulties can be declared which arise in using hearing aids by patients with NIPTS. There are not only different hearing losses within several frequency regions, but also there is different sensitivity for sound intensity and for intensity differences. These differences can be compensated centrally by young patients; the older patients are not able to compensate the changes in the dynamics of the hearing organ.
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Document Type: Research Article
Publication date: July 1, 1973
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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