000207983 001__ 207983
000207983 005__ 20180317092108.0
000207983 037__ $$aCONF
000207983 245__ $$aExperimental assessment of active electroacoustic absorbers for broadband room modes damping
000207983 269__ $$a2015
000207983 260__ $$c2015
000207983 336__ $$aConference Papers
000207983 500__ $$aInvited paper
000207983 520__ $$aActive electroacoustic absorbers are membrane absorbers actuated, through a feedback control loop and an electromechanical driver, so as to present optimal sound absorption on a broadband range around the membrane resonance. Taking advantage of the low resonance frequency of conventional loudspeakers, this technique appears as an interesting solution for the damping of low-frequency modes in rooms. This concept has direct applications to real life problems, such as the equalization of sound diffusion in the low-frequency range, or the mitigation of noise immission from external noise sources in habitations, among others. The performance of 4 prototypes of active electroacoustic absorbers is assessed inside a reverberant chamber with different sound stimuli (stationary broadband noise, pure tones). It is shown that the 4 electroacoustic absorbers prototypes, which represent only 0.1% of the total wall surfaces, achieve a global noise level attenuation of almost 8 dB, on a broad frequency range from 20 Hz up to 100 Hz, with individual mode attenuations up to 12 dB. Moreover, the modal decay times are significantly reduced, which is also verified with recordings of time-limited pure tones at several resonant frequencies in the room.
000207983 6531_ $$aelectroacoustic absorber
000207983 6531_ $$aroom modes damping
000207983 700__ $$0242771$$aLissek, Hervé$$g157878
000207983 700__ $$0247197$$aKarkar, Sami$$g233742
000207983 700__ $$aRivet, Etienne
000207983 700__ $$aAdam, Véronique
000207983 700__ $$aThorse, Torje
000207983 700__ $$aBerthet, Quentin
000207983 700__ $$aPittet, Antoine
000207983 700__ $$aStrobino, David
000207983 700__ $$aRoux, Alain
000207983 700__ $$aMartin, Christian
000207983 7112_ $$aINTERNOISE 2015$$cSan Francisco, California, USA$$dAugust 9-12, 2015
000207983 773__ $$tProceedings of INTERNOISE 2015
000207983 8564_ $$s421041$$uhttps://infoscience.epfl.ch/record/207983/files/IN15-Lissek.pdf$$yPreprint$$zPreprint
000207983 8564_ $$s6732300$$uhttps://infoscience.epfl.ch/record/207983/files/IN15-Lissek_presentation.pptx$$yPresentation$$zPresentation
000207983 909CO $$ooai:infoscience.tind.io:207983$$pSTI$$pconf
000207983 909C0 $$0252392$$pLTS2$$xU10380
000207983 917Z8 $$x157878
000207983 917Z8 $$x157878
000207983 917Z8 $$x195222
000207983 917Z8 $$x195222
000207983 917Z8 $$x157878
000207983 937__ $$aEPFL-CONF-207983
000207983 973__ $$aEPFL$$rNON-REVIEWED$$sPUBLISHED
000207983 980__ $$aCONF