Development of a power-based (intensity-based) audiometer to improve hearing thre

开发基于功率（基于强度）的听力计以改善听力

• 批准号: 7539734
• 负责人: PATRICIA S JENG
• 金额: $ 15.64万
• 依托单位: MIMOSA ACOUSTICS
• 依托单位国家: 美国
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7539734
• 关键词: Accounting; Acoustics; Audiology; Audiometry; Calibration; Clinical; Cochlea; Coupling; Development; Digital Signal Processing; Ear; External auditory canal; Frequencies; Grant; Hearing; Hearing Tests; Human; Individual; Individual Differences; Measurement; Methods; Mimosa; Phase; Public Health; Pure-Tone Audiometry; Signal Transduction; Source; Standards of Weights and Measures; System; Testing; Transducers; Tympanic membrane; Variant; base; electric impedance; improved; instrument; pressure; sound

DESCRIPTION (provided by applicant): Clinical pure tone audiometry is the most basic hearing test. However, measurements obtained with a standard pure tone audiometer do not take into account the large individual differences in the volume of the ear canal and concomitant differences in the acoustic impedance of the ear. As a result, an audiometer that is calibrated in a standard coupler will provide inaccurate values for the acoustic signal reaching the eardrum. These individual variations in ear canal volume and eardrum impedance can have a substantial effect on the canal pressure due to loading of the canal impedance on the transducer source impedance. The most well known effect is that of standing waves, a frequency dependent change in canal impedance due to reflections resulting primarily from the eardrum load impedance. We propose to develop an instrument based on the Mimosa impedance measurement system that allow for the accurate calibration of the transducer in the canal in a manner that removes the effect of standing waves, and delivers a constant sound intensity to the cochlea. Such an instrument has the potential of greatly reducing errors in clinical audiometry. PUBLIC HEALTH RELEVANCE Pure tone audiometry is the most basic measurement in audiology, yet it is subject to significant errors. The basic problem is the inability of traditional methods of audiometric measurement to correct for the large individual differences in acoustic coupling between the earphone generating the test signals and the human ear. Recent advances in digital signal processing have made it possible to correct for these individual differences in a practical way. This grant will develop a clinical instrument for hearing measurement that will provide accurate measurements of hearing sensitivity that are not subject to the errors of traditional audiometry.

描述（由申请人提供）：临床纯音调测量法是最基本的听力测试。但是，用标准的纯音听力计获得的测量值未考虑到耳道体积的较大个体差异以及耳朵的声阻抗的差异。结果，在标准耦合器中校准的听力计将为到达耳膜的声学信号提供不准确的值。这些单独的耳管体积和耳膜阻抗的变化可能会对运河阻抗在换能器源阻抗上加载，从而对运河压力产生重大影响。最著名的效果是站立波，由于主要由耳膜负荷阻抗产生的反射而导致运河阻抗的频率依赖性变化。我们建议根据含羞草阻抗测量系统开发一种仪器，该仪器以消除直立波的效果的方式对换能器进行准确的校准，并为耳蜗提供恒定的声音强度。这样的仪器有可能大大减少临床听觉法的错误。公共卫生相关性纯音调是听力学中最基本的测量方法，但它遇到了重大错误。基本问题是传统的听力测量方法无法纠正产生测试信号和人耳的耳机之间的声音耦合的较大个体差异。数字信号处理的最新进展使得以实际方式纠正这些个体差异成为可能。该赠款将开发一种用于听力测量的临床工具，该工具将提供准确的听力敏感性测量，而听力敏感性不受传统听力测定的错误。