Sound Levels Recorded Within the Symphony Orchestra and Risk Criteria for Hearing Loss

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Abstract
Investigations into noise-induced hearing loss should consist of two parts: a mapping of the sound environment and a charting of hearing loss. This paper is the first part of such an investigation: a mapping of sound levels and sound spectra within the symphony orchestra. It was found that ‘heavy’ symphonic music exceeds the permitted dose for industrial noise equivalent to 85 dB(A) for a full working week. The permitted noise dose is reached for ‘heavy’ music after a working time of 10 hours per week in ‘exposed’ positions, such as in front of trumpets, and after 25 hours in ‘normal’ positions. A simple method to estimate the ‘noise’ exposure in equivalent sound level for combinations of different sorts of music has been developed.

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