INDUSTRIAL NOISE FOR HEARING CONSERVATION

保护听力的工业噪音

• 批准号: 2277518
• 负责人: SHEAU-FANG LEI
• 金额: $ 5.4万
• 依托单位: PLATTSBURGH STATE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-30 至 1997-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2277518
• 关键词: INDUSTRIAL; NOISE; HEARING; CONSERVATION

Noise measurements made for the purpose of hearing conservation practice have as their objective the extraction of some physical metric from the noise that can be used to estimate the hazards to hearing from prolonged exposure. Current practice continues to rely primarily upon a time averaged, integrated approach to quantifying a noise (i.e., an energy metric) despite substantial evidence of the inadequacy of this measure in a variety of industrial situations. Recent experiments have shown that conventional measures of noise exposure such as Leq (equivalent level) and spectrum were poorly correlated with trauma, but that metrics that quantify the temporal characteristics of the noise such as frequency domain kurtosis were highly correlated with both the frequency specificity of hearing loss and the severity of trauma. The primary objective of the proposed research is to develop analytical methods based upon contemporary signal analysis technology that can be used to better characterize noise exposure for the purpose of hearing conservation. The wavelet transformation and the bicepstrum will be developed to obtain metrics which will quantify the temporal characteristics of an exposure and which when used in conjunction with conventional measures will more accurately assess the potential of that noise for producing hearing loss. Specifically, the distribution of time domain kurtosis, the joint peak- interval histogram and the frequency domain kurtosis will be the primary metrics that will be obtained from these analytical techniques.

为保持听力而进行的噪声测量 他们的目标是从宇宙中提取一些物理度量 可用于估计长时间对听力的危害的噪声 曝光。当前的做法仍然主要依赖于一段时间 量化噪声(即，能量)的平均、综合方法 公制)，尽管有大量证据表明这一措施在 各种工业情况。最近的实验表明， 噪声暴露的传统测量方法，如LEQ(当量水平)和 光谱与创伤的相关性很差，但这一指标 量化噪声的时间特征，如频率 领域峰度与两种频率特异性都高度相关 听力损失和创伤的严重性。该计划的主要目标是 建议的研究是开发基于当代的分析方法 可用于更好地表征噪声的信号分析技术 为了保护听力而暴露。小波 变换和双谱将被开发以获得度量 它将量化暴露的时间特征，并且 当与常规措施结合使用时，将更准确地 评估噪声造成听力损失的可能性。 具体地说，时间域峰度的分布、联合峰值-- 区间直方图和频域峰度将是主要的 将从这些分析技术中获得的指标。