Design of Active Noise Control Systems Using Ultrasonic Transducers and Acoustic Holography Techniques

Wen-Kung Tseng
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Wen-Kung Tseng: Graduate Institute of Vehicle Engineering, National Changhua University of Education, Changhua City, Taiwan

International Journal of Technology and Engineering Studies, 2016, vol. 2, issue 1, 26-31

Abstract: This paper presents the design of an active noise control system using ultrasonic transducers and spatial transformation of sound fields in acoustic holography. In active noise control field, most of the researches used traditional loudspeakers as secondary sources. However ultrasonic transducers are used as secondary sources to control the noise. Recently, only a few of the studies used ultrasonic transducers as secondary sources. In active noise control the microphone array is used to measure the sound pressure within the desired quiet zone. However, there is no need to measure the sound pressure within the desired quiet zone using the microphone array in this study. The spatial transformation of sound pressure was used to estimate the sound pressure within the desired quiet zone. Also the ultrasonic transducers were used to control the noise within the desired quiet zone. The results showed that larger quiet zones were obtained using the ultrasonic transducers and acoustic holography in the active noise control system.

Keywords: Active Noise Control; Ultrasonic Transducers; Spatial Transformation; Sound Fields; Acoustic Holography; Microphone Array; Desired Quiet Zone (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:apa:ijtess:2016:p:26-31

DOI: 10.20469/ijtes.2.40005-1

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