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Class Information
Number: 181/151
Name: Acoustics > Diaphragm and enclosure > With sound-absorbing means
Description: Subject matter including sound absorbent material within the means to enclose the diaphragm for preventing undesirable effects.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8627919 Speaker and portable information terminal Jan. 14, 2014
8630435 Apparatus incorporating an adsorbent material, and methods of making same Jan. 14, 2014
8558708 Supplemental alert generation device with speaker enclosure assembly Oct. 15, 2013
8474250 Device and method for the reduction of emissions Jul. 2, 2013
8360201 Sound absorbing structure and sound chamber Jan. 29, 2013
8356689 Structure for the compositely formed sound box Jan. 22, 2013
8333261 Compact subwoofer cabinet Dec. 18, 2012
8292023 Enclosing adsorbent material Oct. 23, 2012
8205712 Ported loudspeaker enclosure with tapered waveguide absorber Jun. 26, 2012
8201659 Recoilless speaker system Jun. 19, 2012
8196700 Anti-vibration device Jun. 12, 2012
8151929 Acoustic waveguide vibration damping Apr. 10, 2012
8139784 Compound loudspeaker Mar. 20, 2012
8083024 Lightweight speaker enclosure Dec. 27, 2011
8002078 Acoustic waveguide vibration damping Aug. 23, 2011
7963363 Soundproof cover for automobiles Jun. 21, 2011
7913807 Vehicle door structure Mar. 29, 2011
7743880 Sound absorbing structure Jun. 29, 2010
7743877 Speaker system Jun. 29, 2010
7677353 Noise suppression structure Mar. 16, 2010
7661508 Lightweight speaker enclosure Feb. 16, 2010
7658263 Device for noise transmission in a motor vehicle Feb. 9, 2010
7614479 Sound enhancement module Nov. 10, 2009
7530425 Speaker enclosure for a ceiling or wall mounted speaker method and apparatus May. 12, 2009
7530424 Sonic boom simulator May. 12, 2009
7447322 Speaker having a transparent panel Nov. 4, 2008
7353907 Speaker enclosure for a wall mounted speaker system Apr. 8, 2008
7337874 Lightweight speaker enclosure Mar. 4, 2008
7325649 Loudspeaker with progressively damped acoustical chamber Feb. 5, 2008
7319772 Speaker device for improving mid/high-range frequencies Jan. 15, 2008
7270215 Loudspeaker enclosure with damping material laminated within internal shearing brace Sep. 18, 2007
7207413 Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems Apr. 24, 2007
7201252 Loudspeaker systems Apr. 10, 2007
RE39330 Speaker system and a method for improving sound quality thereof Oct. 10, 2006
7021419 Speaker system Apr. 4, 2006
7011178 Sound transmitter and speaker Mar. 14, 2006
6913110 Lightweight speaker enclosure Jul. 5, 2005
6886658 Loudspeaker enclosure system May. 3, 2005
6781829 Device for reducing the noise level of a component with moving parts and for cooling the same Aug. 24, 2004
6705426 Acoustic diffuser and method of production Mar. 16, 2004
6686036 Material for casing for acoustic equipment and casing for acoustic equipment fabricated therefrom Feb. 3, 2004
6681024 Device including a built-in electroacoustic transducer for optimum speech reproduction Jan. 20, 2004
6658129 Passive radiator having mass elements Dec. 2, 2003
6598700 Compression molded cellulose (CMC) loudspeaker cabinets and method for making same Jul. 29, 2003
6571909 Loudspeaker enclosure Jun. 3, 2003
6494289 Device for dynamic excitation of panel loudspeakers Dec. 17, 2002
6338395 Kapok loudspeaker enclosure damping material Jan. 15, 2002
6324292 Speaker apparatus Nov. 27, 2001
6320971 Speaker system and a method for improving sound quality thereof Nov. 20, 2001
6278789 Frequency selective acoustic waveguide damping Aug. 21, 2001

1 2 3 4










 
 
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