- Published on 15 May 2013
This includes estimates of NIHL prevalence and the design and evaluation of education and prevention programs to reduce the impact of noise. Using a modeling approach, the team has estimated that NIHL contributes to 17-25% of cases of hearing impairment in New Zealand and is therefore a significant modifiable risk factor. A key component of the project is monitoring the noise injury. The team is also studying distortion product otoacoustic emissions (DPOAE) as a measure of early injury. To assess DPOAEs as a measure of injury, they have recorded them using swept pure tones and extracted DPOAE components using a least-squares fit approach in noise and non-noise exposed individuals. OAE findings have been compared with measures of auditory function. The team found that the generator component correlated more strongly with auditory threshold and thus may be a better physiological index of noise injury. Overall, these findings have informed a national strategy involving government and community agencies to mitigate the effects of noise.
Source: Univ. of Auckland, School of Population Health