噪声的听力增强效应研究  

Noise-enhanced Hearing Sensitivity

作　　者：龙贤明[1] 戴冀斌[2] 朱国斌 龙长才[4] 

机构地区：[1]武汉大学医学院,湖北武汉430071 [2]武汉大学医学院解剖教研室,湖北武汉430071 [3]湖北省汉川市中医医院,431600 [4]华中科技大学物理系,湖北武汉430074

出　　处：《时珍国医国药》2005年第4期284-286,共3页Lishizhen Medicine and Materia Medica Research

基　　金：国家自然科学基金(No.30270372)

摘　　要：目的:研究听觉的随机共振效应。方法:测试在不同的噪声水平时听力正常的11名受试者感知听阈附近纯音的能力。结果:当纯音强度远高于或低于被试者的听阈时,增加噪声并不能改善被试者的检测能力;当纯音强度等于或略低于被测试的听阈时,某种水平的噪声能提高感知能力。对于所有11名受试者,噪声都显示了对接近听阈的弱小纯音信号的听力有增强效应。结论:在特定的噪声水平,噪声对听阈附近的纯音感受是有益的。Objective : To study the effect of stochastic resonance on hearing sensitivity. Methods: 11 subjects'abilities to detect near threshold pure tone levels were measured in different noise free from hearing disorder. Results: When the amplitude of pure tone was well above or well below measured hearing threshold, the additive noise did not affect its detect ability;When the amplitude of pure tone is equal or a little below the threshold, noises of certain levels have enhanced effect on the deteetability. All 11 subjects showed the noise-enhanced ability of detecting near threshold pure tone. Conclusion: Noise does benefit human near threshold hearing when noise level is optimal.

关 键 词：听力敏感性 噪声增强 神经非线性信号处理 

分 类 号：R322.92[医药卫生—人体解剖和组织胚胎学]