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Document ID (ISN)74805
CIS number 00-830
ISSN - Serial title 0340-2444 - Zeitschrift für Arbeitswissenschaft
Year 1999
Convention or series no.
Author(s) Irle H., Hinzmann G., Strasser H.
Title Hearing threshold shifts associated with impulse noise - Influence of the number and duration of pulses
Original title Hörschwellenverschiebungen nach Impulsschall - Einfluß der Impulsanzahl und Impulsdauer [in German]
Bibliographic information Aug. 1999, Vol.53, No.2, p.83-94. Illus. 32 ref.
Abstract Acoustic pulses such as those experienced in weapon firing, pyrotechnics, ramming and riveting have a deafening effect measured in terms of the temporary threshold shift (TTS, in dB), the TTS decay time (in min) and the integrated restitution (IR) of TTS. At equivalent acoustic load levels, it was found by measuring all three parameters in test subjects that shorter (and more frequent) pulses cause significantly more deafening. After 5ms pulses, the decay time was as long as 10h. A doubling of pulse frequency causes far more deafening than a doubling of pulse duration. Thus, acoustic loads cannot reliably be expressed as a noise dose (dB) or recalculated by using equivalent energies, and the noise exposure guidelines should be revised accordingly.
Descriptors (primary) impulse noise; hearing threshold; hearing loss
Descriptors (secondary) temporary threshold shift; equivalent continuous noise; gunfire noise; exposure evaluation; noise dosimetry; riveting
Document type D - Periodical articles
Country / State or ProvinceGermany
Subject(s) Noise, hearing and vibration
Broad subject area(s) Physical hazards
Browse category(ies) Noise
Diseases of the ear and hearing damage