ClassID:

231942

H04R1/347 - CPC Classification

Classification description:

Details of transducers, loudspeakers or microphones; Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers for obtaining a phase-shift between the front and back acoustic wave

Recent Application in this class:
#1
20260143279
2026-05-21

Speaker and Electronic Device

#2
20250344018
2025-11-06

LOUDSPEAKER DEVICE

#3
20250193570
2025-06-12

EARPHONE WITHOUT COVERING AN EAR CANAL

#4
20250168557
2025-05-22

ACOUSTIC SIGNAL OUTPUT DEVICE

#5
20250039591
2025-01-30

ACOUSTIC OUTPUT APPARATUS

#6
20250030969
2025-01-23

ACOUSTIC OUTPUT APPARATUS AND METHODS THEREOF

#7
20250016487
2025-01-09

ACOUSTIC OUTPUT APPARATUS

#8
20250008254
2025-01-02

ACOUSTIC SIGNAL OUTPUT DEVICE

#9
20240422466
2024-12-19

OPEN EARPHONE

#10
20240406618
2024-12-05

ACOUSTIC DEVICE

#11
20240406611
2024-12-05

ACOUSTIC OUTPUT APPARATUS

#12
20240388831
2024-11-21

ACOUSTIC OUTPUT DEVICE

#13
20240323579
2024-09-26

ACOUSTIC OUTPUT DEVICE AND COMPONENTS THEREOF

#14
20240284099
2024-08-22

PLAYING DEVICE, SOUND GENERATING DEVICE AND CONTROL APPARATUS THEREFOR

#15
20240205582
2024-06-20

Acoustic device

#16
20240171892
2024-05-23

ACOUSTIC OUTPUT DEVICE AND NOISE REDUCTION AND SOUND TRANSMISSION DEVICE

#17
20240073579
2024-02-29

Acoustic output apparatus

#18
20230396912
2023-12-07

ACOUSTIC OUTPUT APPARATUS AND METHOD THEREOF

#19
20230336902
2023-10-19

Earphone without covering an ear canal

#20
20230276161
2023-08-31

Acoustic output apparatus

#21
20230276160
2023-08-31

Acoustic output apparatus

#22
20230232145
2023-07-20

Acoustic output apparatus and methods thereof

#23
20230199377
2023-06-22

Headrest mounted loudspeaker for producing sound at base frequencies

#24
20230171528
2023-06-01

Open earphone

#25
20230156391
2023-05-18

Acoustic output device

#26
20230156390
2023-05-18

Acoustic output device

#27
20230145038
2023-05-11

Acoustic output device

#28
20230141946
2023-05-11

Acoustic output device

#29
20230109699
2023-04-13

Acoustic device

#30
20230070507
2023-03-09

ACOUSTIC OUTPUT APPARATUS AND METHOD THEREOF

#31
20230066263
2023-03-02

Acoustic output device

#32
20230012124
2023-01-12

Acoustic output device and components thereof

#33
20230007380
2023-01-05

Acoustic output apparatus

#34
20220408172
2022-12-22

Acoustic output apparatus

#35
20220386012
2022-12-01

Acoustic output apparatus

#36
20220264212
2022-08-18

Open earphone

#37
20220225015
2022-07-14

Headset

#38
20220095051
2022-03-24

Sound bar, audio signal processing method, and program

#39
20220070570
2022-03-03

Acoustic output device and noise reduction and sound transmission device

#40
20220030347
2022-01-27

Acoustic output apparatus

#41
20220021963
2022-01-20

Acoustic output apparatus and methods thereof

#42
20210377645
2021-12-02

Acoustic output apparatus and method thereof

#43
20210377639
2021-12-02

Acoustic device

#44
20210289281
2021-09-16

Acoustic output apparatus

#45
20210274281
2021-09-02

Acoustic output apparatus

#46
20210274280
2021-09-02

Acoustic output device and buttons thereof

#47
20210274278
2021-09-02

Acoustic output apparatus

#48
20210274276
2021-09-02

Earphone without covering an ear canal

#49
20210271115
2021-09-02

Microphone noise reduction system and smart glasses using the system

#50
20210243518
2021-08-05

Acoustic output device and components thereof

#51
20210235181
2021-07-29

Acoustic output apparatus

#52
20210227306
2021-07-22

Audio glasses

#53
20210223577
2021-07-22

Acoustic output device

#54
20210185421
2021-06-17

Acoustic output apparatus with a plurality of acoustic drivers and methods thereof

#55
20210168500
2021-06-03

Acoustic output apparatus

#56
20210168498
2021-06-03

Acoustic output apparatus with drivers in multiple frequency ranges and bluetooth low energy receiver

#57
20210168495
2021-06-03

Acoustic output apparatus

#58
20210168485
2021-06-03

Open earphone

#59
20210160610
2021-05-27

Acoustic output apparatus and methods thereof

#60
20210160609
2021-05-27

Eyeglass headphones

#61
20210160606
2021-05-27

Open earphone

#62
20210160602
2021-05-27

Acoustic device

#63
20210127200
2021-04-29

Acoustic output device

#64
20210127197
2021-04-29

Acoustic output apparatus

#65
20210112329
2021-04-15

Open earphone

#66
20210067858
2021-03-04

Open audio device

#67
20200329305
2020-10-15

Audio system having beam-shaping speakers and eyewear having such an audio system

#68
20200145745
2020-05-07

Acoustic device

#69
20200112783
2020-04-09

Acoustic device

#70
20190342655
2019-11-07

Full-range speaker with phase plate

#71
20190273984
2019-09-05

Eyeglass headphones

#72
20190238971
2019-08-01

Eyeglass headphones

#73
20190052954
2019-02-14

Audio system having beam-shaping speakers and eyewear having such an audio system

#74
20190020940
2019-01-17

Acoustic transducer

#75
20180279041
2018-09-27

Phase plug having non-round face profile

#76
20180279040
2018-09-27

Microphone and manufacturing method thereof

#77
20180167710
2018-06-14

Acoustic transducer

#78
20170353787
2017-12-07

Passive cardioid speaker

#79
20160337749
2016-11-17

Low diffraction tweeter housing

#80
20160021446
2016-01-21

Acoustic device

#81
20150304747
2015-10-22

Speaker module

#82
20150086057
2015-03-26

Bass reflex loudspeaker system with phase correction element

#83
20150063621
2015-03-05

Speaker assembly

#84
20130266151
2013-10-10

Electroacoustic transducer

#85
20130220730
2013-08-29

Folded horn enclosure with inter-channel reflex-porting

#86
20130128130
2013-05-23

Video display device

#87
20130004007
2013-01-03

Open-baffle loudspeaker

#88
20100254558
2010-10-07

Loudspeaker with passive low frequency directional control

#89
20100215206
2010-08-26

Audio speakers

#90
20090067635
2009-03-12

APPARATUS AND METHOD FOR REPRODUCTION OF STEREO SOUND

#91
20080190688
2008-08-14

Speaker embodying a stereo sound

#92
20080170736
2008-07-17

Sound broadcasting mechanism and electronic device using the same

#93
20080013768
2008-01-17

Loudspeaker Enclosure and Loudspeaker System

#94
20070041590
2007-02-22

Directional speaker system

#95
17115634
2021-12-14

Speaker assembly for mitigation of leakage

#96
16055760
2019-03-19

Acoustic system for cancelling out-of-phase reflected soundwaves of audio output systems