- Tytuł:
- Theoretical Predictions and Actual Hearing Threshold Levels in Workers Exposed to Ultrasonic Noise of Impulsive Character—A Pilot Study
- Autorzy:
-
Pawlaczyk-Łuszczyńska, M.
Dudarewicz, A.
Śliwińska-Kowalska, M. - Powiązania:
- https://bibliotekanauki.pl/articles/90926.pdf
- Data publikacji:
- 2007
- Wydawca:
- Centralny Instytut Ochrony Pracy
- Tematy:
-
ultrasonic noise
noise measurements
pure-tone audiometry
hearing threshold levels - Opis:
- Results of standard pure-tone audiom etry (PTA) were collected from 25 workers, mainly females, aged 23–58 years, exposed for 2–13 years to ultrasonic noise emitted by ultrasonic welders. Hearing tests were completed by evaluation of exposure to ultrasonic noise. The subjects’ actual audiometric hearing threshold levels (HTLs) were compared with theoretical predictions calculated according to ISO 1999:1990. In 60% of cases sound pressure levels in the 10–40 kHz 1/3-octave bands at workstands exceeded Polish exposure limits for ultrasonic noise. Our comparison of predicted and measured HTLs suggests that the ISO 1999:1990 method, intended for audible noise, might also make it possible to predict reliably permanent hearing loss (in the 2 000–6 000 Hz frequency range) after exposure to ultrasonic noise. No significant progress of hearing impairment (assessed using PTA) in the operators of ultrasonic welders was noted. Nevertheless, further studies on the hearing status of workers exposed to ultrasonic noise are needed.
- Źródło:
-
International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 409--418
1080-3548 - Pojawia się w:
- International Journal of Occupational Safety and Ergonomics
- Dostawca treści:
- Biblioteka Nauki
Artykuł