Calculatuon and assessment noise induced hearing loss excess risk in group of population

Abstract

Introduction. Prevention of occupation hearing loss should be based on mathematical models and computational methods to predict changes in hearing thresholds (HT) with age and under the action of noise on the hearing organ. There is an urgent need for quantitative methods to determine the health risk of exposure to noise above 80 dBA.The aim of the study was to determine the group excessive risk of hearing loss (ERHL) under the action of noise using the model of the third edition of ISO 1999.Materials and methods. Developed technology for the determination of the HT model, the third edition of ISO 1999, depending on the gender, age, length of service and experienced noise exposure on the basis of the related sett lement tables MSExcell for population percentiles 1 to 99% in 1% step. Results. With the use of the developed technology, the initial data were determined and the main indicators of the group risk of hearing loss at the levels of criteria for the diagnosis of sensorineural hearing loss (SNT) were calculated. Th eir dependences on age, length of service and noise level are calculated.Conclusions: Th e developed technology allows us to calculate the probable hearing thresholds of the quantile of the population exposed to and unaff ected by noise and the magnitude of the group excess risk.

Assessment of noise-induced hearing loss (NIHL) of weaving factory workers in West Bengal, India - a pilot study

“…A periodic audiometric examination can be considered the principal medical prevention of excessive noise exposure. [8][9] According to OSHA if the noise level in the workplace is 85 dB(A) or above for an average period of eight hours the employers must organize a hearing conversation program for the employees. 10 Occupational health diseases often have a long latency period, making it difficult to diagnose at the primary stage.…”