Low-frequency absorption using a two-layer system with active control of input impedance
نویسندگان
چکیده
منابع مشابه
Low-frequency absorption using a two-layer system with active control of input impedance.
Broadband noise absorption, including low frequencies, may be obtained by a hybrid passive-active two-layer system. A porous layer in front of an air layer provides passive absorption, at medium and high frequencies. Active control of the input impedance of the two-layer system yields absorption at low frequencies. The active control system can implement either pressure-release or impedance-mat...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 2003
ISSN: 0001-4966
DOI: 10.1121/1.1629306