|Document ID (ISN)||19062|
|Convention or series no.
||Johansson B., Kylin B., Roepstorff S.
||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
||Undersökning av buller i verkstadsindustri - Del I: Bedömning av hörselskaderisk vid exposition för oregelbundet buller. En fält- och laboratoriestudie [in Swedish]|
||Arbetsmedicinska Institutet, Fack, S-104 01 Stockholm 60, Sweden, June 1972, 18p. Illus. 4 ref.
||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.
||machinery industry; recurrent noise; biological hazards; audiology; deafness
||hearing loss; Sweden
||E - Books, reports, proceedings
||Materials handling and storage
|Broad subject area(s)
||Diseases of the ear and hearing damage