Implementation of active noise control for hearing test application using PC

International Conference on Instrumentation, Communication, Information Technology, and Biomedical Engineering 2009 Pub Date : 2009-11-01 DOI:10.1109/ICICI-BME.2009.5417247

Dhifaf Azeez, M. Ali, H. Husain, G. Beng, C. Umat, R. Mustafa

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引用次数: 3

Abstract

Hearing screening test is a method to determine the disorder in human ears. Conventional audiometer and an audiologist are required in order to perform the hearing screening test. However, this procedure is difficult to be implemented especially in a remote site such as factory or school due to the ambient noise which may cause inaccuracy in the test. In this work, the application of active noise control (ANC) is proposed to reduce the ambient noise using a personal computer in hearing screening test. The ANC algorithm was implemented using a computer with data acquisition modules and LabVIEW software. The results showed that the anti-noise was successfully generated in the electrical domain but no reduction was observed in the acoustic domain. The ANC is a deterministic application that requires real-time operating system to respond to the input with precisely timed output. In order to have an effective ANC system, the processing time has to be less than 0.125 ms at 8 KHz sampling rate.

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使用PC实现听力测试应用的主动噪声控制

听力筛查试验是一种确定人耳疾病的方法。为了进行听力筛查测试，需要常规的听力计和听力学家。然而，由于环境噪声可能导致测试不准确，该程序很难实施，特别是在工厂或学校等偏远地点。本文提出了在听力筛查测试中应用主动噪声控制(ANC)来降低环境噪声的方法。采用带有数据采集模块的计算机和LabVIEW软件实现了该算法。结果表明，在电域中成功地产生了抗噪声，而在声域中没有观察到降低。ANC是一种确定性应用程序，它要求实时操作系统以精确定时的输出响应输入。为了拥有一个有效的ANC系统，在8 KHz采样率下，处理时间必须小于0.125 ms。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Conference on Instrumentation, Communication, Information Technology, and Biomedical Engineering 2009

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