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Study on human auditory system models and risk assessment of noise induced hearing loss.

机译：研究人类听觉系统模型和噪声诱发的听力损失的风险评估。

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摘要

Simulation-based study of human auditory response characteristics and development of a prototype for advanced noise guideline are two major focuses of this dissertation research. This research was conducted as a part of the long-term effort to develop an improved noise guideline for better protection of the workers exposed to various noise environments.;The human auditory responses were studied with simulation models. A human full-ear model derived from an existing model, Auditory Hazard Assessment Algorithm for Human (AHAAH), was utilized as a baseline for the study. Frequency- and time-domain responses of well-known human middle ear network models were cross-compared to estimate expected accuracy of the models and understand their proper use. Responses of the stapes to impulsive noises were investigated by using the middle ear models to understand the effects of the temporal characteristics of impulsive noises on the responses. Available measured transfer functions between the free-field pressure and the stapes response for human and chinchilla were also used to study the auditory response characteristics. The measured transfer functions were refined and reconditioned to make them have equivalent formats. Using the reconstructed transfer functions, time-domain stapes responses of human and chinchilla to impulsive and complex type noises were calculated and compared. Applicability of the noise metrics defined in terms of the stapes response to assess the risk of the noise induced hearing loss was studied.;A prototype of an improved noise guideline was developed from existing chinchilla noise exposure data. Applying a new signal processing technique to the time histories of the exposed noises and studying the relationship between the noise metric and the permanent threshold shift (PTS), the dose-response relationship (DRR) was established in a compatible way with the definition used in current human noise guidelines. From the DDR, noise induced hearing loss (NIHL) threshold is estimated as a function of frequency. An advanced noise guideline that enables quantitative, frequency by frequency assessment of risk of the noise was developed by utilizing the identified NIHL threshold. The guideline was developed so that it can be easily transformed to a human noise guideline. Therefore, the guideline serves as a prototype of a future human noise guideline.
机译：基于仿真的人类听觉响应特性研究和高级噪声准则原型的开发是本论文研究的两个主要重点。这项研究是长期努力的一部分，旨在制定改进的噪声指南以更好地保护处于各种噪声环境下的工人。;使用模拟模型研究了人类的听觉响应。从现有模型“人类听觉危害评估算法”（AHAAH）获得的人类全耳模型被用作研究的基准。将著名的人类中耳网络模型的频域和时域响应进行了交叉比较，以估计模型的预期准确性并了解其正确用法。通过使用中耳模型来研究骨对脉冲噪声的响应，以了解脉冲噪声的时间特性对其响应的影响。在人和黄鼠的自由场压力与the骨反应之间可用的测量传递函数也用于研究听觉响应特征。对测得的传递函数进行了改进和调整，以使其具有相同的格式。使用重构的传递函数，计算并比较了人和龙猫对冲动和复杂类型噪声的时域骨响应。研究了根据metrics骨反应定义的噪声指标在评估噪声诱发的听力损失风险中的适用性。根据现有的黄鼠噪声暴露数据，开发了一种改进的噪声准则的原型。将一种新的信号处理技术应用于暴露噪声的时间历史，并研究噪声度量与永久阈值偏移（PTS）之间的关系，以兼容的方式建立了剂量反应关系（DRR），该定义与当前的人类噪声准则。根据DDR，可以将噪声诱发的听力损失（NIHL）阈值估计为频率的函数。利用识别出的NIHL阈值，开发了一种先进的噪声指南，该噪声指南能够逐个频率地评估噪声风险。制定了该指南，以便可以轻松将其转换为人耳噪声指南。因此，该指南是未来人类噪声指南的原型。

著录项

  • 作者

    Song, Won Joon.;

  • 作者单位

    University of Cincinnati.;

  • 授予单位 University of Cincinnati.;
  • 学科 Health Sciences Audiology.;Engineering Mechanical.;Health Sciences Occupational Health and Safety.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 269 p.
  • 总页数 269
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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