Title |
High-frequency hearing risk of operators of industrial ultrasonic devices
|
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Published in |
International Archives of Occupational and Environmental Health, November 1983
|
DOI | 10.1007/bf00406179 |
Pubmed ID | |
Authors |
J. Grzesik, E. Pluta |
Abstract |
Sound and ultrasound emitted by industrial ultrasonic (Uls) devices exceed the known proposed hygienic limits, especially for frequencies 10-20 kHz. The consequence of this may be a negative influence of this energy on the auditory function in the high-frequency hearing range. To determine the hearing risk to Uls operators, an adequate method for testing the hearing threshold from 10-20 kHz has been developed. In order to get reference values, 189 non-exposed persons were tested. On this basis, the hearing thresholds of 55 operators for frequencies 500-20,000 Hz were evaluated. In addition to threshold elevations in the range 10-20 kHz, a decreasing number of subjects responding to stimuli at the highest audible frequencies was observed. The threshold shift at 10-20 kHz of subjects exposed to sound and ultrasound emitted by Uls-devices depends upon the physical parameters of the sound spectrum, time on the job and daily exposure time. No abnormalities were found in the hearing range 500-8000 Hz. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 7 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Master | 3 | 43% |
Student > Bachelor | 2 | 29% |
Student > Ph. D. Student | 1 | 14% |
Unknown | 1 | 14% |
Readers by discipline | Count | As % |
---|---|---|
Nursing and Health Professions | 2 | 29% |
Engineering | 2 | 29% |
Computer Science | 1 | 14% |
Unknown | 2 | 29% |