Narrow-Band Active Noise Reduction for DPOAE Measurement

用于 DPOAE 测量的窄带主动降噪

• 批准号: 7056308
• 负责人: ROBERT J KLINE-SCHODER
• 金额: $ 41.39万
• 依托单位: CREARE, LLC
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2008-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7056308
• 关键词: clinical research; measurement; noise; reduction

DESCRIPTION (provided by applicant): The aim of this project is to enable accurate acquisition of distortion product otoacoustic emission (DPOAE) measurements in relatively high noise environments for use in hearing evaluations and screening. DPOAE measurements have been shown to be an effective and efficient method for screening infant, child, and adult hearing. Environmental noise, however, can adversely affect the ability to successfully obtain DPOAE measurements. We are working to achieve our aim by developing a narrow-band, adaptive active noise reduction system that seamlessly augments existing DPOAE measurement protocols. Our innovation will supplement existing DPOAE measurement systems with both low-cost acoustic hardware and advanced signal processing techniques. By reducing background noise levels in a narrow frequency band near the DPOAE test frequencies, we enable higher signal-to-noise ratio (SNR) DPOAE measurements. The increased SNR results in the ability to obtain DPOAE measurements in relatively high noise environments such as the newborn intensive care unit and nursery, offices of pediatricians, field hospitals, and remote or mobile clinics. Our Phase I results clearly demonstrated our innovation. Results of pilot human subject tests show an increase of approximately 10 dB in the SNR at the DPOAE frequency for measurements in a common clinical noise environment.

描述(申请人提供)：该项目的目标是在相对较高的噪声环境中准确获取失真产物耳声发射(DPOAE)测量结果，用于听力评估和筛查。DPOAE测量已被证明是筛选婴儿、儿童和成人听力的一种有效和高效的方法。然而，环境噪声可能会对成功获得DPOAE测量的能力产生不利影响。我们正在努力通过开发一种窄带、自适应有源降噪系统来实现我们的目标，该系统无缝地增强了现有的DPOAE测量协议。我们的创新将用低成本的声学硬件和先进的信号处理技术来补充现有的DPOAE测量系统。通过降低接近DPOAE测试频率的窄频带内的背景噪声水平，我们实现了更高的信噪比(SNR)DPOAE测量。信噪比的提高使得能够在噪声相对较高的环境中获得DPOAE测量，例如新生儿重症监护病房和托儿所、儿科医生办公室、野战医院以及偏远或移动诊所。我们的第一阶段结果清楚地展示了我们的创新。飞行员人体受试者测试的结果显示，在常见的临床噪声环境中进行测量时，在DPOAE频率下的信噪比增加了约10分贝。