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CISDOC database

Document ID (ISN)19062
CIS number 73-641
Year 1972
Convention or series no.
Author(s) Johansson B., Kylin B., Roepstorff S.
Title Investigation of noise in the metalworking industry - Part I: Evaluation of the hearing damage risk from exposure to irregular noise. A field and laboratory study
Original title Undersökning av buller i verkstadsindustri - Del I: Bedömning av hörselskaderisk vid exposition för oregelbundet buller. En fält- och laboratoriestudie [in Swedish]
Bibliographic information Arbetsmedicinska Institutet, Fack, S-104 01 Stockholm 60, Sweden, June 1972, 18p. Illus. 4 ref.
Abstract Report on audiometric tests on 170 young workers exposed to non-steady-state work-shop noise. The authors converted the intermittent noise according to ISO Recommendation R 1999 to an equivalent steady-state noise and correlated the results with the audiograms. The correlation showed that hearing damage increases on the average proportionally to noise level. The results also suggest that the conversion method tends to shift the risk limit by about 5 dB towards more tolerable values. In the laboratory, 20 persons with normal hearing were exposed to equivalent levels of steady-state and intermittent industrial noise. The temporary threshold shifts recorded 15 min after exposure showed that intermittent noise, as converted according to the recommended method, produces a lower threshold shift than steady-state noise.
Descriptors (primary) machinery industry; recurrent noise; biological hazards; audiology; deafness
Descriptors (secondary) hearing loss; Sweden
Document type E - Books, reports, proceedings
Subject(s) Materials handling and storage
Broad subject area(s)
Browse category(ies) Diseases of the ear and hearing damage
Metalworking industry
Biological hazards