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Class Information
Number: 381/73.1
Name: Electrical audio signal processing systems and devices > Sound or noise masking
Description: Subject matter which utilizes sound to reduce the distractive influences of unwanted sound or other audible noise.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8712070 Simultaneous enhancement of transmission loss and absorption coefficient using activated cavities Apr. 29, 2014
8705753 System for processing sound signals in a vehicle multimedia system Apr. 22, 2014
8666086 System and method for monitoring/controlling a sound masking system from an electronic floorplan Mar. 4, 2014
8620003 Embedded audio system in distributed acoustic sources Dec. 31, 2013
8588429 Sound device and sound control device Nov. 19, 2013
8571230 Active noise reduction adaptive filter adaptation rate adjusting Oct. 29, 2013
8532987 Speech masking and cancelling and voice obscuration Sep. 10, 2013
8526627 Noise reduction device Sep. 3, 2013
8520859 System for comfort noise injection Aug. 27, 2013
8504360 Automatic sound recognition based on binary time frequency units Aug. 6, 2013
8503688 Device to enhance an ear bud Aug. 6, 2013
8494175 Noise reduction device and noise reduction system Jul. 23, 2013
8488806 Signal processing apparatus Jul. 16, 2013
8477958 Networked sound masking system Jul. 2, 2013
8467539 High transmission loss cushion Jun. 18, 2013
8428272 Masking sound generating apparatus, masking system, masking sound generating method, and program Apr. 23, 2013
8422698 Signal processing apparatus and method, and program Apr. 16, 2013
8364478 Audio signal processing apparatus, audio signal processing method, and communication terminal Jan. 29, 2013
8355514 Audio encoding to convey auxiliary information, and media embodying same Jan. 15, 2013
8340320 Mute circuits Dec. 25, 2012
8340318 Methods and systems for measuring performance of a noise cancellation system Dec. 25, 2012
8306237 Head-mounting device to mask ambient sounds for sleeping Nov. 6, 2012
8306240 Active noise reduction adaptive filter adaptation rate adjusting Nov. 6, 2012
8295504 Methods and devices for fan control of an electronic device based on loudness data Oct. 23, 2012
8295505 Earphone with controllable leakage of surrounding sound and device therefor Oct. 23, 2012
8280069 Noise reduction apparatus Oct. 2, 2012
8280068 Ambient audio transformation using transformation audio Oct. 2, 2012
8280067 Integrated ambient audio transformation device Oct. 2, 2012
8271288 Sound masking system and masking sound generation method Sep. 18, 2012
8259958 Engine sound control apparatus and control method Sep. 4, 2012
8254590 System and method for intelligibility enhancement of audio information Aug. 28, 2012
8243944 Foldable wireless voice muffling device for mobile communications Aug. 14, 2012
8238569 Method, medium, and apparatus for extracting target sound from mixed sound Aug. 7, 2012
8229129 Method, medium, and apparatus for extracting target sound from mixed sound Jul. 24, 2012
8229130 Distributed acoustic conversation shielding system Jul. 24, 2012
8223985 Masking of pure tones within sound from a noise generating source Jul. 17, 2012
8218783 Masking based gain control Jul. 10, 2012
8199923 Active noise control system Jun. 12, 2012
8194874 In-room acoustic magnitude response smoothing via summation of correction signals Jun. 5, 2012
8194871 System and method for call privacy Jun. 5, 2012
8194866 Sound monitoring, data collection and advisory system Jun. 5, 2012
8189802 Digital filtering in a Class D amplifier system to reduce noise fold over May. 29, 2012
8180064 System and method for providing voice equalization May. 15, 2012
8170230 Reducing audio masking May. 1, 2012
8165314 Audio output apparatus and audio output method Apr. 24, 2012
8155927 Method and apparatus for improving noise discrimination in multiple sensor pairs Apr. 10, 2012
8139777 System for comfort noise injection Mar. 20, 2012
8130971 Manually switching dual-mode hearing protector Mar. 6, 2012
8126159 System and method for creating personalized sound zones Feb. 28, 2012
8121319 Tracking system using audio signals below threshold Feb. 21, 2012

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