Noise attenuating earphones for audiometric testing
نویسندگان
چکیده
منابع مشابه
A noise-attenuating enclosure for audiometer earphones.
Noise-excluding earphones may be subdivided into circumaural earphones and noise-attenuating earphone enclosures. Two versions of 'Otocups', an example of the latter subdivision, were evaluated in a series of experiments and in comparison with a conventional type of earphone (Telephonics TDH-39 receiver in a MX-4I /AR cushion). The experiments involved a comparison of auditory threshold, artifi...
متن کاملInsert earphones for speech recognition testing.
Performance-intensity functions for PB word lists were run on 19 normal-hearing subjects and 15 subjects with sensorineural hearing losses. Comparisons were made between standard supra-aural earphones (TDH-49P) and insert phones (ER-3A). Results showed that, at least for the higher sensation levels where word recognition tests are usually performed, the phones may be used interchangeably. Using...
متن کاملMaximum Permissible Ambient Noise Levels for Audiometric Test Rooms.
This Standard specifies maximum permissible ambient noise levels (MPANLs) allowed in an audiometric test room that produce negligible masking ( 2 dB) of test signals presented at reference equivalent threshold levels specified in ANSI S3.6-1996 American National Standard Specification of Audiometers. The MPANLs are specified from 125 to 8000 Hz in octave and one-third octave band intervals for ...
متن کاملAuditing occupational audiometric testing – a pilot study
Concept Safety Systems cc P O Box 8497, Edenglen, 1613 e-mail: [email protected] ABSTRACT Uncontrolled exposure to noise in the occupational setting may cause occupational noise induced hearing loss (NIHL). In South Africa, once an exposed worker has shifted 10 percentage points from his baseline audiometric reading he is eligible for compensation.1 Pure tone air conduction (PTAC) audiometric s...
متن کاملA tutorial on complex sound fields for audiometric testing.
A fundamental understanding of soundfield characteristics in enclosed spaces is required in order to appreciate and predict the behavior of complex sound fields (i.e., sound fields created with at least two uncorrelated sound sources on different axes) used in auditory tests for evaluating hearing aid performance, especially speech-in-noise tasks. This article is a tutorial starting with ideali...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1987
ISSN: 0001-4966
DOI: 10.1121/1.2024312