Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53702#.VNBntyzQrzE Author(s) Wen-Kung Tseng Affiliation(s) Graduate Institute of Vehicle Engineering, National Changhua University of Education, Changhua City, Taiwan . ABSTRACT This paper presents quiet zone design using ultrasonic transducers for local active control in pure tone diffuse fields. Most of researches in local active noise control used conventional loudspeakers for the secondary sources to produce quiet zones. Recently ultrasonic transducers have been used for the secondary sources to control the plane wave in active noise control. However there is no research related to active noise control in diffuse fields using ultrasonic transducers. Therefore this study uses ultrasonic transducers for the secondary sources to control the diffuse fields. The quiet zone produced using ultrasonic transducers in single tone diffuse fields has been analy...
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