Patents-Review.com
ClassID:

231927 ⎘

H04R1/2869 - 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

Sub-classes:
Recent Application in this class:
#1
20260046548
2026-02-12

HEARING DEVICE

 #2
20250287143
2025-09-11

IN-EAR MONITOR APPARATUS

 #3
20250267395
2025-08-21

INTERFERENCE TUBE FOR A MICROPHONE

 #4
20250210023
2025-06-26

HELMHOLTZ RESONATOR, ACOUSTIC METAMATERIAL, ACOUSTIC ABSORBER, SOUND OUTPUT DEVICE AND MICROPHONE

 #5
20250142250
2025-05-01

BONE CONDUCTION MICROPHONE WITH RESONANCE CONTROL BASED ON DETERMINED AUDIO CONTEXT INFORMATION

 #6
20250133320
2025-04-24

ELECTRONIC DEVICES

 #7
20240251200
2024-07-25

ACOUSTIC OUTPUT DEVICES

 #8
20240205578
2024-06-20

MICROPHONE CHIP AND MICROPHONE

 #9
20230300517
2023-09-21

HEARING DEVICE

 #10
20230300509
2023-09-21

HEARING DEVICE

 #11
20230296879
2023-09-21

Active acoustic ripple cancellation for MEMS mirrors

 #12
20230202405
2023-06-29

Vehicle door

 #13
20230027858
2023-01-26

Voice reception device

 #14
20220394364
2022-12-08

MOVING COIL MICROPHONE TRANSDUCER WITH SECONDARY PORT

 #15
20220329926
2022-10-13

Earphone with duct unit dividing pressure equilibrium hole and back hole

 #16
20220272441
2022-08-25

Electronic equipment including a sound-proof acoustic duct

 #17
20220167080
2022-05-26

Electronic device

 #18
20210352399
2021-11-11

Method, system and devices for selective modal control for vibrating structures

 #19
20210297768
2021-09-23

Acoustic filter for a coaxial electro-acoustic transducer

 #20
20210272546
2021-09-02

Active acoustic and vibration noise canceling in waterproof camera

 #21
20210204052
2021-07-01

Information processing apparatus

 #22
20200280777
2020-09-03

Speaker device and enclosure

 #23
20200275195
2020-08-27

Sound transducer

 #24
20200260165
2020-08-13

Moving coil microphone transducer with secondary port

 #25
20200184943
2020-06-11

Active acoustic and vibration noise canceling in waterproof camera

 #26
20200120427
2020-04-16

Method, system and devices for selective modal control for vibrating structures

 #27
20200014999
2020-01-09

Display apparatus

 #28
20190261107
2019-08-22

Apparatus and methods for monitoring a microphone

 #29
20190208311
2019-07-04

Earphone, earphone control method and device

 #30
20190182584
2019-06-13

Vehicle speaker arragement

 #31
20190158944
2019-05-23

Direct-radiating earphone drivers

 #32
20190141433
2019-05-09

Pickup sensor and biological sensor

 #33
20190028786
2019-01-24

Moving coil microphone transducer with secondary port

 #34
20180343509
2018-11-29

Speaker system

 #35
20180336274
2018-11-22

Vibrational devices as sound sensors

 #36
20180332174
2018-11-15

Echo reducer, voice communication device, method for reducing echo, and recording medium

 #37
20180317000
2018-11-01

Display apparatus

 #38
20180316995
2018-11-01

Electroacoustic transducer

 #39
20180304310
2018-10-25

Interference Reduction Techniques in Haptic Systems

 #40
20180288523
2018-10-04

Apparatus and methods for monitoring a microphone

 #41
20180262842
2018-09-13

Electroacoustic transducer, method of manufacturing electroacoustic transducer, and electroacoustic transducing device

 #42
20180128483
2018-05-10

Damper for gas turbine

 #43
20180102123
2018-04-12

Active acoustic and vibration noise canceling in waterproof camera

 #44
20180020290
2018-01-18

Vehicle speaker arrangement

 #45
20180020284
2018-01-18

Acoustic resistor, acoustic resistor member including same, and audio device including same

 #46
20170374450
2017-12-28

Sound reproducing device

 #47
20170347204
2017-11-30

Miniature sounder

 #48
20170238085
2017-08-17

In-ear monitor

 #49
20170180839
2017-06-22

Electronic device

 #50
20170055069
2017-02-23

Loudspeaker

 #51
20170026739
2017-01-26

Speaker and headphone device

 #52
20160142824
2016-05-19

Knurled speaker diaphragm

 #53
20160088386
2016-03-24

Loudspeaker system audio recovery imaging amplifier

 #54
20150326974
2015-11-12

Single magnet planar-magnetic transducer

 #55
20150304748
2015-10-22

Loudspeaker

 #56
20150258574
2015-09-17

Piezoelectric electroacoustic transducer

 #57
20150078565
2015-03-19

Dual-diaphragm microphone module to reduce vibration noise

 #58
20140314249
2014-10-23

Slim profile loudspeaker

 #59
20140112466
2014-04-24

System and method for clock synchronization of acoustic echo canceller (AEC) with different sampling clocks for speakers and microphones

 #60
20130279732
2013-10-24

Shock Resistant Receiver And Method Of Manufacturing The Same

 #61
20130148830
2013-06-13

Earphone

 #62
20130061224
2013-03-07

Moveable access control list (ACL) mechanisms for hypervisors and virtual machines and virtual port firewalls

 #63
20120294465
2012-11-22

Earpiece with hollow elongated member having a nonlinear portion

 #64
20120219171
2012-08-30

Loudspeaker assembly and system

 #65
20100183173
2010-07-22

Dynamic sound transducer and receiver

 #66
20090263937
2009-10-22

Leadframe package for MEMS microphone assembly

 #67
20080163207
2008-07-03

Moveable access control list (ACL) mechanisms for hypervisors and virtual machines and virtual port firewalls

 #68
20080157301
2008-07-03

Leadframe package for MEMS microphone assembly

 #69
18330146
2024-04-23

Techniques for loudspeaker constrained acoustic modulator (CAM)

 #70
15933810
2019-02-19

Noise control system for a ducted rotor assembly

 #71
15599999
2017-11-28

Active shooter and environment detection