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Class Information
Number: 381/349
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Acoustic enclosure > Bass reflex (e.g., rear wave)
Description: Subject matter in which a non-primary sound radiation path from the transducer"s diaphragm is vented to ambient through the housing or cavity.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8649506 Integrated speaker assembly for personal media device Feb. 11, 2014
8605929 Film-type audio output apparatus Dec. 10, 2013
8594358 Passive acoustical radiating Nov. 26, 2013
8588449 Audio driver Nov. 19, 2013
8577076 Speaker device Nov. 5, 2013
8565463 Loudspeaker system Oct. 22, 2013
8538059 Ear speaker device Sep. 17, 2013
8528690 Sound effect amplication diffuser Sep. 10, 2013
8430200 Speaker apparatus Apr. 30, 2013
8391528 Loudspeaker slotted duct port Mar. 5, 2013
8391510 Sound reproduction system comprising a loudspeaker enclosure with ports, and associated processing circuit Mar. 5, 2013
8385575 Reflex enclosure Feb. 26, 2013
8345908 High output loudspeaker Jan. 1, 2013
8340337 Loudspeaker module Dec. 25, 2012
8320599 Resonator system for a speaker of an electronic device Nov. 27, 2012
8311258 Headset Nov. 13, 2012
8284977 Multi chamber ported stereo speaker Oct. 9, 2012
8213659 Apparatus with adjustable speaker arrangement Jul. 3, 2012
8189841 Acoustic passive radiating May. 29, 2012
8184826 Speaker system May. 22, 2012
8180071 Pseudo deep bass generating device May. 15, 2012
8180086 Speaker May. 15, 2012
8175316 Ear speaker device May. 8, 2012
8160286 Speaker system Apr. 17, 2012
8135163 Balanced armature with acoustic low pass filter Mar. 13, 2012
8094853 Speaker system and fitting device Jan. 10, 2012
8073177 Film-type audio output apparatus Dec. 6, 2011
8064627 Acoustic system Nov. 22, 2011
8036410 Offset baffles for acoustic signal arrival synchronization Oct. 11, 2011
8031896 Passive acoustic radiating Oct. 4, 2011
8031895 Driver and enclosure combination Oct. 4, 2011
8028792 Speaker apparatus Oct. 4, 2011
8019108 Speaker system Sep. 13, 2011
7954435 Sound systems for model railroad locomotives Jun. 7, 2011
7953239 High output sub-woofer May. 31, 2011
7928303 Insert for cajon drum Apr. 19, 2011
7925036 Folded coaxial transmission line loudspeaker Apr. 12, 2011
7894614 System and method for achieving extended low-frequency response in a loudspeaker system Feb. 22, 2011
7886869 Acoustic waveguide mode controlling Feb. 15, 2011
7831057 High output loudspeaker Nov. 9, 2010
7813770 Speaker module design Oct. 12, 2010
7764806 Speaker set with acoustically vented enclosures Jul. 27, 2010
7711134 Speaker port system for reducing boundary layer separation May. 4, 2010
7711135 Sounding device May. 4, 2010
7680293 Loudspeaker apparatus Mar. 16, 2010
7676047 Electroacoustical transducing with low frequency augmenting devices Mar. 9, 2010
7668331 Fidelity speaker Feb. 23, 2010
7664283 Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves Feb. 16, 2010
7643643 Electronic apparatus Jan. 5, 2010
7624839 Enclosure for symbiotic active/passive operation of an acoustic driver Dec. 1, 2009

1 2 3 4










 
 
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