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Active Noise Control for Hearing Screening Test: Simulation and Experiment
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Author(s): Dhifaf Azeez (Universiti Kebangsaan Malaysia, Malaysia), Mohd Alauddin Mohd Ali (Universiti Kebangsaan Malaysia, Malaysia), Hafizah Husain (Universiti Kebangsaan Malaysia, Malaysia), Gan Kok Beng (Universiti Kebangsaan Malaysia, Malaysia)and Cila Umat (Universiti Kebangsaan Malaysia, Malaysia)
Copyright: 2012
Pages: 11
Source title:
Emerging Communication Technologies for E-Health and Medicine
Source Author(s)/Editor(s): Joel J.P.C. Rodrigues (Senac Faculty of Ceará, Fortaleza-CE, Brazil; Instituto de Telecomunicações, Portugal)
DOI: 10.4018/978-1-4666-0909-9.ch010
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Abstract
A hearing screening test is a method to determine human ear disorders and conventional audiometers and audiologists are required to perform the test. However, this procedure is difficult to implement, especially in a remote site such as a factory or a school due to the ambient noise that may cause test inaccuracy. In this work, the application of active noise control (ANC) is proposed to reduce the ambient noise using a personal computer in a hearing screening test. The ANC algorithm was simulated in MATLAB software and implemented using a computer with data acquisition modules and LabVIEW software. Results show that anti-noise was successfully generated in the electrical domain but no reduction was observed in the acoustic domain. ANC is a deterministic application that requires a real-time operating system to respond to the input with precisely timed output. 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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