Active Noise Control for Hearing Screening Test

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.

Noise Pollution in Metalwork and Woodwork Industries in the Kingdom of Saudi Arabia

“…Noise control measures such as replacing or modifying noisy machines, enclosing and/or isolating noisy sources, should be adopted. Many examples of noise control methods were described in literature [71,72,73,74,75,76,77,78,79,80,81,82]. There are also many reports on noise control in woodwork [16,35] and metalwork industries [13,28,31,57].…”