Patents-Review.com
ClassID:

231917 ⎘

H04R1/2823 - 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; Enclosures comprising vibrating or resonating arrangements of the bass reflex type Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material

Recent Application in this class:
#1
20250048029
2025-02-06

Microphone and Thin Plate Pressure Attenuator

 #2
20240251199
2024-07-25

Air-Pulse Generating Device, Wearable Sound Device, Fanless Blower, and Airflow Producing Method

 #3
20240114272
2024-04-04

SPEAKER DEVICE

 #4
20240080604
2024-03-07

Acoustic vent and protective membrane

 #5
20240080603
2024-03-07

Acoustic vent and protective membrane

 #6
20230217154
2023-07-06

Acoustic sensor assembly having improved frequency response

 #7
20230217153
2023-07-06

Balanced armature receiver with liquid-resistant pressure relief vent

 #8
20230130211
2023-04-27

OPEN-EAR HOOK-TYPE WEARABLE SOUND PRODUCING DEVICE

 #9
20230048436
2023-02-16

EARPHONE

 #10
20220345809
2022-10-27

Acoustic adapter for a loudspeaker driver

 #11
20220201386
2022-06-23

Nonlinear port parameters for vented box modeling of loudspeakers

 #12
20220174140
2022-06-02

Electronic device

 #13
20220095030
2022-03-24

Pressure relief valve for headphones

 #14
20220086559
2022-03-17

WEARABLE AUDIO DEVICE WITH TRI-PORT ACOUSTIC CAVITY

 #15
20220038812
2022-02-03

Headphones

 #16
20210392430
2021-12-16

Earphone body with tuned vents

 #17
20210352398
2021-11-11

Duct structure of earphone speaker unit

 #18
20210258705
2021-08-19

Acoustical protector for audio devices and audio device provided with said protector

 #19
20210227315
2021-07-22

Acoustic device with deformable shape as valve

 #20
20210105555
2021-04-08

Acoustic chambers to improve sound reproduction between left and right earcups

 #21
20200404410
2020-12-24

Mass loaded earbud with vent chamber

 #22
20200120415
2020-04-16

Nonlinear port parameters for vented box modeling of loudspeakers

 #23
20200021906
2020-01-16

Loudspeaker

 #24
20200017357
2020-01-16

MEMS microphone, method of manufacturing the same and MEMS microphone package including the same

 #25
20190394560
2019-12-26

Speaker

 #26
20190379962
2019-12-12

VENTING HEADPHONES

 #27
20190320256
2019-10-17

Sound output device

 #28
20190313190
2019-10-10

Sound producing device

 #29
20190297429
2019-09-26

Microphone, mobile terminal and electronic device

 #30
20190028814
2019-01-24

MEMS microphone

 #31
20180352062
2018-12-06

Common acoustic transducer and indicator lamp port for electronic devices

 #32
20180310093
2018-10-25

Headphones and speaker unit

 #33
20180302732
2018-10-18

Ported headphones and related methods

 #34
20180255394
2018-09-06

Active noise control with planar transducers

 #35
20180242070
2018-08-23

Headphone ventilation

 #36
20180227660
2018-08-09

Mass loaded earbud with vent chamber

 #37
20180124509
2018-05-03

Non-axisymmetric and non-horn phase plugs

 #38
20180063635
2018-03-01

NON-AXISYMMETRIC AND NON-HORN PHASE PLUGS

 #39
20180020284
2018-01-18

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

 #40
20170374449
2017-12-28

Headset porting

 #41
20170223443
2017-08-03

Pressure equalization in earphones

 #42
20170111720
2017-04-20

Multi-microphone porting and venting structure for a communication device

 #43
20170070808
2017-03-09

Earphone having an acoustic tuning mechanism

 #44
20170026739
2017-01-26

Speaker and headphone device

 #45
20160360312
2016-12-08

Dynamic acoustic waveguide

 #46
20160345098
2016-11-24

Systems and methods for improved audio output in electronic devices

 #47
20160219361
2016-07-28

Personal audio equipment provided with air vent unit and noise cancellation function

 #48
20160219360
2016-07-28

Earphone

 #49
20160212524
2016-07-21

Earphones with air release valves

 #50
20160165335
2016-06-09

Loudspeaker with a helmholtz resonator

 #51
20160080859
2016-03-17

Earphone having an acoustic tuning mechanism

 #52
20160029137
2016-01-28

Mass port plug for customizing headphone drivers, and related methods

 #53
20150382100
2015-12-31

Mass loaded earbud with vent chamber

 #54
20150245132
2015-08-27

Speaker module

 #55
20150194138
2015-07-09

Keyboard instrument

 #56
20150181346
2015-06-25

Directional MEMS microphone and receiver device

 #57
20140294223
2014-10-02

Headset porting

 #58
20140119592
2014-05-01

Sound transducer with ventilation structure

 #59
20130343593
2013-12-26

Earphone having an acoustic tuning mechanism

 #60
20130322672
2013-12-05

Electronic device with loudspeaker

 #61
20130277140
2013-10-24

Loudspeaker

 #62
20130170691
2013-07-04

Multi-diameter speaker vent ports

 #63
19200926
2025-07-29

Loudspeaker system having an acoustic meta material enclosure

 #64
16944819
2021-12-28

Wearable audio device with tri-port acoustic cavity

 #65
15496520
2019-01-22

Adjustable acoustic bass earbud

 #66
15214567
2019-06-18

Top port MEMS package and method

 #67
14982421
2017-05-16

Noise-canceling concha headphone