Application of the kurtosis statistic to the evaluation of the risk of hearing loss in workers exposed to high-level complex noise.

Objective: Develop dose-response relations for two groups of industrial workers exposed to Gaussian or non-Gaussian (complex) types of continuous noises and to investigate what role, if any, the kurtosis statistic can play in the evaluation of industrial noise-induced hearing loss (NIHL).

Design: Audiometric and noise exposure data were acquired on a population (N = 195) of screened workers from a textile manufacturing plant and a metal fabrication facility located in Henan province of China. Thirty-two of the subjects were exposed to non-Gaussian (non-G) noise and 163 were exposed to a Gaussian (G) continuous noise.

[Relationship between sample size and variation of means for personal noise exposure in weaving workers].

Objective: To explore the relationship between sample size and variance of means for personal noise exposure in weaving workers as to contributing evidence for establishing personal noise exposure measurement guideline.

Methods: A personal noise exposure measurement database from a group of weaving workers was used in the randomized re-sampling data analysis. The sampling cases were one number selecting from one to fifteen at each randomized re-sampling procedure.

[Adjustment of dose-response relationship of industrial impulse noise induced high frequency hearing loss with different exchange rate].

Objective: To explore a new method to evaluate the dose-response relationship between the noise exposure and prevalence of noise induced high frequency hearing loss.

Methods: Physical examination and questionnaire survey were conducted among 32 mechanical workers, 12 males and 20 females, aged 35.1 +/- 7.

[Relationship between impulse noise and continuous noise inducing hearing loss by dosimeter measurement in working populations].

Objective: To compare the dose-response relationship differences between impulse noise exposure workers and continuous noise exposure workers in prevalence of noise inducing hearing loss using dosimeter measurement.

Methods: Thirty-two mechanical workers in a workshop were selected as impulse noise group and 163 textile workers in a textile factory as continuous noise group. SH-126 dosimeter was used to measure A weighted equal sound level of eight hours (L(Aeq.