[Measurement of the temporary auditory threshold shift (TTS) for evaluation of the degree of noise hazard].

Long-term investigations of noise in coal mines enhanced the need to take measurements at work stations posing high risk of methane explosion. To facilitate evaluation of noise hazard at the workplace in coal mines, attempts have been made to apply TTS measurements. Measurements of TTS taken within 3 to 5 minutes after cessation of noise exposure in industrial conditions made it possible to evaluate equivalent sound level.