ClassID:

231928

H04R1/2873 - CPC Classification

Classification description:

Details of transducers, loudspeakers or microphones; Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only; Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means; Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself for loudspeaker transducers

Recent Application in this class:
#1
20260149915
2026-05-28

WIDE COVERAGE SPEAKER

#2
20260122409
2026-04-30

UNIFIED MICROPHONE AND LOUDSPEAKER TO REDUCE ACOUSTIC COUPLING

#3
20260067612
2026-03-05

LOW FREQUENCY RESONATOR AND PRESSURE RELIEF STRUCTURE FOR HEADPHONES

#4
20260059230
2026-02-26

ACOUSTIC HORN RESONANCE ABSORBER AND DISTORTION REDUCER

#5
20260045247
2026-02-12

AUDIO SPEAKERS ORIENTED FOR CONSTRAINING SOUND TRAVEL

#6
20260040010
2026-02-05

ELECTRONIC DEVICE

#7
20260039995
2026-02-05

LOW PROFILE LOUDSPEAKER DEVICE

#8
20260019739
2026-01-15

ACOUSTIC ABSORBERS FOR AUDIO SPEAKERS

#9
20250386146
2025-12-18

Acoustic electromagnetic actuator with high magnetic flux density in outer magnetic circuit part and output device thereto

#10
20250365532
2025-11-27

ELECTRONIC DEVICE COMPRISING SPEAKER MODULE

#11
20250317689
2025-10-09

DIAPHRAGM WITH DEFORMATION STRUCTURES TO REDUCE VIBRATION MAGNITUDE AT RESONANCE FREQUENCY

#12
20250287144
2025-09-11

SPEAKER APPARATUS WITH A SLOT SPEAKER UNIT

#13
20250274715
2025-08-28

SPEAKER APPARATUS

#14
20250234137
2025-07-17

SYSTEM AND METHOD FOR LOW-PROFILE AUDIO DEVICE WITH FORCE CANCELLING TRANSDUCER

#15
20250227409
2025-07-10

SPEAKER BOX

#16
20250184656
2025-06-05

Display Device

#17
20250157450
2025-05-15

ACOUSTIC WAVE ATTENUATOR FOR AN ELECTRONIC DEVICE

#18
20250080900
2025-03-06

Speaker resonator

#19
20250071472
2025-02-27

EAR DOME FOR A HEARING DEVICE

#20
20250056153
2025-02-13

VIBRATION-DAMPING RECTANGULAR MAGNETIC ASSEMBLY

#21
20250024194
2025-01-16

LOW PROFILE LOUDSPEAKER DEVICE

#22
20250008254
2025-01-02

ACOUSTIC SIGNAL OUTPUT DEVICE

#23
20240430613
2024-12-26

ACOUSTIC OUTPUT DEVICE

#24
20240414471
2024-12-12

SOUND PRESSURE CONTROL DEVICE, ELECTRONIC DEVICE, AND COMPONENT

#25
20240388858
2024-11-21

EARPHONE COUPLER

#26
20240388838
2024-11-21

Device detection method and terminal

#27
20240323593
2024-09-26

TRANSDUCERS AND HEADPHONES

#28
20240317146
2024-09-26

RECREATIONAL VEHICLE STORAGE AND SPEAKER SYSTEMS

#29
20240314478
2024-09-19

DIAPHRAGM WITH EXCITER, AND VEHICLE WINDOW GLASS

#30
20240284096
2024-08-22

Force Canceling Speaker

#31
20240275916
2024-08-15

DISPLAY APPARATUS AND COMPUTING APPARATUS INCLUDING THE SAME

#32
20240214720
2024-06-27

SPEAKER MODULE

#33
20240205593
2024-06-20

ACTUATOR WITH DISTRIBUTED RESONANCES

#34
20240163602
2024-05-16

PANEL AUDIO LOUDSPEAKERS INCLUDING MECHANICALLY GROUNDED MAGNETIC CIRCUIT

#35
20240107233
2024-03-28

SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

#36
20240040303
2024-02-01

APPARATUS AND METHOD FOR GENERATING A FIRST CONTROL SIGNAL AND A SECOND CONTROL SIGNAL BY USING A LINEARIZATION AND/OR A BANDWIDTH EXTENSION

#37
20240031712
2024-01-25

DIPOLE LOUDSPEAKER ASSEMBLY

#38
20230403502
2023-12-14

DIRECTIONAL MICROPHONE RECEIVER AND SOUND DEVICE

#39
20230276175
2023-08-31

Low profile loudspeaker device

#40
20230262370
2023-08-17

Inductive acoustic filters for acoustic devices

#41
20230247347
2023-08-03

Noise-reducing loudspeaker

#42
20230092004
2023-03-23

Acoustic wave attenuator for an electronic device

#43
20220360733
2022-11-10

Display apparatus and computing apparatus including the same

#44
20220337941
2022-10-20

Directive multiway loudspeaker with a waveguide

#45
20220210546
2022-06-30

Acoustic device

#46
20220210545
2022-06-30

Speaker device

#47
20220159370
2022-05-19

Audio devices having low-frequency extension filter

#48
20220038813
2022-02-03

HEADPHONES

#49
20210227331
2021-07-22

Loudpseakers

#50
20210168478
2021-06-03

Sound output device

#51
20210105557
2021-04-08

Horn loudspeakers

#52
20210084404
2021-03-18

Method for use with a speakerphone system that corrects for mechanical vibrations

#53
20210006744
2021-01-07

Display apparatus and computing apparatus including the same

#54
20200404414
2020-12-24

Omnidirectional loudspeaker box and manufacturing method therefor

#55
20200366980
2020-11-19

Sound output device

#56
20200359128
2020-11-12

Sound output assembly

#57
20200304905
2020-09-24

High compliance microspeakers for vibration mitigation in a personal audio device

#58
20200296502
2020-09-17

Low profile loudspeaker device

#59
20200280777
2020-09-03

Speaker device and enclosure

#60
20200107113
2020-04-02

Pressure-responsive sensors and related systems and methods

#61
20200053467
2020-02-13

SPEAKER

#62
20200045415
2020-02-06

Speaker box

#63
20190379957
2019-12-12

Speaker box

#64
20190373360
2019-12-05

Speaker assembly

#65
20190248297
2019-08-15

Waveguide enabled externally ducted vehicle loudspeaker

#66
20190222923
2019-07-18

Speaker frame and speaker having the same

#67
20190166257
2019-05-30

Microphone assembly for echo rejection in audio endpoints

#68
20190108828
2019-04-11

Noise cancellation device and noise cancellation method

#69
20190069077
2019-02-28

Loudspeaker with deflector at a port exit

#70
20190037305
2019-01-31

Noise reduction for high-airflow audio transducers

#71
20190037164
2019-01-31

Display apparatus and computing apparatus including the same

#72
20190028808
2019-01-24

Voice emitting device of speaker

#73
20180310093
2018-10-25

Headphones and speaker unit

#74
20180310092
2018-10-25

Ultrathin acoustic impedance converter

#75
20180220228
2018-08-02

Noise reduction for high-airflow audio transducers

#76
20180199133
2018-07-12

Speaker frame and speaker having the same

#77
20180199132
2018-07-12

Speaker frame and speaker having the same

#78
20180146282
2018-05-24

Loudspeaker with a gas adsorbing material and mobile device comprising a loudspeaker

#79
20180139523
2018-05-17

Sound output device

#80
20180124484
2018-05-03

ENHANCING AUDIO PERFORMANCE OF A CONSUMER ELECTRONIC DEVICE BY PRODUCING COMPENSATION PARAMETERS BASED ON THE ACOUSTIC SIGNATURE OF THE DEVICE

#81
20180108338
2018-04-19

ACOUSTIC TRANSDUCER DEVICE COMPRISING A PIEZO SOUND TRANSDUCER AND AN MUT SOUND TRANSDUCER, METHOD OF OPERATING SAME, ACOUSTIC SYSTEM, ACOUSTIC COUPLING STRUCTURE, AND METHOD OF PRODUCING AN ACOUSTIC COUPLING STRUCTURE

#82
20180084233
2018-03-22

Wireless audio and video home theater ceiling projector system

#83
20180054670
2018-02-22

Earphone having damped ear canal resonance

#84
20180035198
2018-02-01

Speaker module with sealed cavity and a communicating hole

#85
20180027323
2018-01-25

Speaker frame and speaker having the same

#86
20170353783
2017-12-07

Thin speaker module with a front acoustic cavity

#87
20170332167
2017-11-16

Speaker device with enhancement of bass and electronic device therewith

#88
20170325018
2017-11-09

ACOUSTIC BAFFLE

#89
20170295425
2017-10-12

Balanced armature based valve

#90
20170280232
2017-09-28

USER TERMINAL

#91
20170230758
2017-08-10

Microphone and pressure sensor

#92
20170150250
2017-05-25

Speaker frame and speaker having the same

#93
20170118553
2017-04-27

Vibration compensated vibro acoustical assembly

#94
20170045179
2017-02-16

Device base

#95
20170026746
2017-01-26

Electric rocking mode damper

#96
20170026739
2017-01-26

Speaker and headphone device

#97
20160373855
2016-12-22

Acoustic structure and acoustic panel

#98
20160360313
2016-12-08

Distributed mode louspeaker damping oscillations within exciter feet

#99
20160309254
2016-10-20

Acoustic sound adsorption material having attached sphere matrix

#100
20160269820
2016-09-15

Loudspeakers

#101
20160261938
2016-09-08

Enhancing audio performance of a consumer electronic device by producing compensation parameters based on the acoustic signature of the device

#102
20160255433
2016-09-01

Balanced armature based valve

#103
20160165335
2016-06-09

Loudspeaker with a helmholtz resonator

#104
20160127831
2016-05-05

Honeycomb speaker system

#105
20160066111
2016-03-03

Ear canal earpiece and earmold unit for an earpiece

#106
20160025118
2016-01-28

Device base

#107
20150296303
2015-10-15

Acoustic generator, acoustic generation device, and electronic device

#108
20140341385
2014-11-20

Dual resonator chamber with variable volume

#109
20140305735
2014-10-16

Moving armature receiver assemblies with vibration suppression

#110
20140064539
2014-03-06

Vibration-reducing passive radiators

#111
20140064522
2014-03-06

Speaker

#112
20130156245
2013-06-20

Extended duct with damping for improved speaker performance

#113
20130062139
2013-03-14

Audio apparatus

#114
20130028434
2013-01-31

Earphone arrangements

#115
20130016857
2013-01-17

Low frequency equalization for loudspeaker system

#116
20130004008
2013-01-03

Reflex enclosure

#117
20120255805
2012-10-11

Moving armature receiver assemblies with vibration suppression

#118
20120051573
2012-03-01

Passive acoustical radiating

#119
20120008813
2012-01-12

Baffle vibration reducing

#120
20110037906
2011-02-17

Low frequency enclosure for video display devices

#121
20110013798
2011-01-20

Speaker frame and speaker having the same

#122
20100266149
2010-10-21

In-wall sub-woofer with high-volume displacement

#123
20100246881
2010-09-30

Sound converter with enclosure

#124
20100080400
2010-04-01

EAR-WORN SPEAKER-CARRYING DEVICES

#125
20090208026
2009-08-20

Baffle vibration reducing

#126
20090080678
2009-03-26

Speaker device of mobile communication terminal for outputting high quality sound

#127
20080080727
2008-04-03

In-wall sub-woofer system with high-volume displacement

#128
20080031472
2008-02-07

Electroacoustical transducing

#129
20070215407
2007-09-20

Loudspeaker device

#130
20070172082
2007-07-26

Low frequency equalization for loudspeaker system

#131
20070172081
2007-07-26

Low frequency equalization for loudspeaker system

#132
20070092096
2007-04-26

PASSIVE ACOUSTICAL RADIATING

#133
20070030992
2007-02-08

Low frequency loudspeaker enclosure

#134
20060291684
2006-12-28

Passive acoustic radiating

#135
20060280321
2006-12-14

Acoustic apparatus

#136
20060147077
2006-07-06

Room mode bass absorption through combined diaphragmatic and helmholtz resonance techniques

#137
20060078144
2006-04-13

Compound-driven augmented passive radiator

#138
20050111673
2005-05-26

Baffle vibration reducing

#139
20050018868
2005-01-27

Passive acoustic radiating

#140
19294047
2025-12-16

Sound attenuator with push button actuator

#141
19246891
2025-10-14

Loudspeaker system comprising a headrest

#142
19200926
2025-07-29

Loudspeaker system having an acoustic meta material enclosure

#143
16852203
2023-02-28

Personalized headphone EQ based on headphone properties and user geometry

#144
16368721
2020-03-10

Acoustically tuned face panel for speaker system

#145
16257422
2020-11-24

Loudspeaker-induced noise mitigation

#146
16139736
2019-12-31

Alarm with piezoelectric element driven repetitively over pseudorandom frequencies

#147
16121698
2019-10-29

Anti-vibration structure of a speaker and anti-vibration method for the same

#148
15982392
2020-05-19

Acoustic echo cancellation with loudspeaker canceling beamformer

#149
15417205
2018-03-13

Speaker box