Sound Level Control Based on Grey System Theory for Protection Against Hearing Damage Risk in Music Entertainment Venues

摘要

The personnel of entertainment venues are often exposed to music exceeding the maximum permissible sound levels specified in occupational safety and health standards to protect the employees against excessive., harmful exposure to noise. As communication medium and source of aesthetic experience., music is not usually associated with noise - a term denoting an unwanted, annoying sound - therefore the sound levels of music are not monitored in most venues. As a result, both the personnel and the audience are often exposed to sound levels from loudspeakers or headphones that pose a high risk of hearing damage. In this paper we propose a solution intended to reduce the risk of hearing damage by predicting the daily noise exposure level (LEX, 8 h) and automatically limiting the level of reproduced sound. Both the prediction method and the sound level controller are based on the concept of a first-order prediction model GM(l,l) derived from the grey systems theory (GST). The paper presents the results of simulation calculations for different parameters of the prediction model and configurations of sound level adjustment.