ClassID:

232198

H04R2420/07 - page 6 - CPC Classification

Classification description:

Details of connection covered by , not provided for in its groups Applications of wireless loudspeakers or wireless microphones

Recent Application in this class:
#1501
20220102843
2022-03-31

Wearable accessory with phased array antenna system

#1502
20220095715
2022-03-31

Facemask With Electronic Components

#1503
20220095069
2022-03-24

Systems and methods for authenticating and calibrating passive speakers with a graphical user interface

#1504
20220095053
2022-03-24

Integrated headset communications systems

#1505
20220095049
2022-03-24

Wearable device with directional audio

#1506
20220095037
2022-03-24

Headphone interaction with media playback system

#1507
20220095035
2022-03-24

Information processing device and information processing method

#1508
20220095031
2022-03-24

Headset with internal gimbal

#1509
20220091816
2022-03-24

Wireless earpiece with a passive virtual assistant

#1510
20220091813
2022-03-24

Command dial in a media playback system

#1511
20220091674
2022-03-24

Hearing augmentation and wearable system with localized feedback

#1512
20220086578
2022-03-17

Electronic device for outputting sound and method for operating the same

#1513
20220086573
2022-03-17

Actuator testing systems and methods

#1514
20220086557
2022-03-17

Gaming headset with programmable audio paths

#1515
20220086555
2022-03-17

Earphone device

#1516
20220086553
2022-03-17

Communication control method, device and system, charging box and wireless earpiece

#1517
20220086212
2022-03-17

Digital data processing

#1518
20220085659
2022-03-17

Transport and/or storage container for rechargeable wireless earphones

#1519
20220079833
2022-03-17

EXOSKELETON DEVICE

#1520
20220078555
2022-03-10

SYSTEMS AND METHODS FOR TUNING BASED ON FURNITURE CONFIGURATION

#1521
20220078551
2022-03-10

Audio processing using distributed machine learning model

#1522
20220078541
2022-03-10

Audio data transmission method applied to switching between single-earbud mode and double-earbud mode of TWS headset and device

#1523
20220078537
2022-03-10

PERFORMANCE NECKBAND FOR WIRELESS EARBUDS

#1524
20220074581
2022-03-10

Multifunctional LED lamp

#1525
20220070804
2022-03-03

Delaying rendering time for audio computing systems

#1526
20220070642
2022-03-03

METHODS AND SYSTEMS FOR COMMUNICATING WITH DEVICE CASES

#1527
20220070592
2022-03-03

Ultrasonic proximity sensors, and related systems and methods

#1528
20220070585
2022-03-03

Dynamic adjustment of earbud performance characteristics

#1529
20220070570
2022-03-03

Acoustic output device and noise reduction and sound transmission device

#1530
20220070564
2022-03-03

Modular communication device

#1531
20220070560
2022-03-03

Self-powered mountable speaker bar

#1532
20220069626
2022-03-03

Enclosure wireless charging

#1533
20220066734
2022-03-03

Vocal guidance engines for playback devices

#1534
20220061307
2022-03-03

Pest repellers

#1535
20220060831
2022-02-24

Devices, systems and processes for providing adaptive audio environments

#1536
20220060829
2022-02-24

Electronic furniture assembly with integrated internal speaker system including downward oriented speaker

#1537
20220060815
2022-02-24

Vehicle and control method thereof

#1538
20220060811
2022-02-24

Speaker device

#1539
20220060809
2022-02-24

Bluetooth earphone system, and earphone case for storing and charging Bluetooth earphones

#1540
20220060278
2022-02-24

FLEXIBLE MODULATION AND CODING SCHEME AUDIO SYSTEM

#1541
20220060033
2022-02-24

Mobile device and operating method thereof

#1542
20220057981
2022-02-24

Media sharing community

#1543
20220054870
2022-02-24

Face Mask Communication System

#1544
20220053599
2022-02-17

Latency reduction

#1545
20220053270
2022-02-17

Electronic device and method for audio sharing using the same

#1546
20220053258
2022-02-17

Wireless ear bud system with pose detection

#1547
20220053256
2022-02-17

Wireless earphone linking method and apparatus and wireless earphone

#1548
20220053255
2022-02-17

Wireless headset

#1549
20220051689
2022-02-17

Contactless cough detection and attribution

#1550
20220051660
2022-02-17

Hearing Device User Communicating With a Wireless Communication Device

#1551
20220046367
2022-02-10

Power management in low power wireless link in a hearing aid system

#1552
20220046352
2022-02-10

Wireless audio device battery pre-loading and pre-charging

#1553
20220046311
2022-02-10

Network-based audio playback

#1554
20220044695
2022-02-10

Robust short-time fourier transform acoustic echo cancellation during audio playback

#1555
20220043624
2022-02-10

Control pod for a wireless headset

#1556
20220039179
2022-02-03

Bluetooth connection method and device

#1557
20220039041
2022-02-03

Point-to-multipoint data transmission method and electronic device

#1558
20220038837
2022-02-03

System and method for dynamic control of wireless speaker systems

#1559
20220038818
2022-02-03

Optimized audio forwarding

#1560
20220038808
2022-02-03

Dynamic allocation of operational resources of wearables

#1561
20220038807
2022-02-03

Interactive control method and device of earphones, earphone and storage medium

#1562
20220038802
2022-02-03

Speaker and shower

#1563
20220038769
2022-02-03

SYNCHRONIZING BLUETOOTH DATA CAPTURE TO DATA PLAYBACK

#1564
20220035594
2022-02-03

Electronic device and method for controlling audio volume thereof

#1565
20220030356
2022-01-27

Smart audio system capable of determining speaker type and position

#1566
20220030347
2022-01-27

Acoustic output apparatus

#1567
20220030346
2022-01-27

Wireless audio output devices

#1568
20220030345
2022-01-27

User identification using headphones

#1569
20220029456
2022-01-27

Microphone, a headphone, a kit comprising the microphone and the headphone, and a method for processing sound using the kit

#1570
20220027174
2022-01-27

True wireless headphones with improved user interface to an experiential eco-system and related devices, methods, and systems

#1571
20220026975
2022-01-27

Information processing device, wearable device, information processing method, and storage medium

#1572
20220021994
2022-01-20

Mobile electronic device and audio server for coordinated playout of audio media content

#1573
20220021968
2022-01-20

Earphones

#1574
20220021963
2022-01-20

Acoustic output apparatus and methods thereof

#1575
20220021961
2022-01-20

Elastomer sleeve for wireless earphone and wireless earphone

#1576
20220019092
2022-01-20

Eyeglasses with audio playback function

#1577
20220014835
2022-01-13

Hearing device with active vent click compensation

#1578
20220007105
2022-01-06

Method for controlling sound box, sound box, and non-transitory computer readable storage medium

#1579
20220007102
2022-01-06

Headset kit

#1580
20220007096
2022-01-06

Magnetic earphones holder

#1581
20220006892
2022-01-06

Wirelessly coupled accessory system for an electronic device

#1582
20220006143
2022-01-06

Battery connection system for a wirelessly locatable tag

#1583
20220004837
2022-01-06

Enclosure for a wirelessly locatable tag

#1584
20220004836
2022-01-06

Mounting base for a wirelessly locatable tag

#1585
20220004835
2022-01-06

Audio output system for a wirelessly locatable tag

#1586
20220004834
2022-01-06

Antenna assembly for a wirelessly locatable tag

#1587
20220004725
2022-01-06

Holding accessory for a wirelessly locatable tag

#1588
20220003831
2022-01-06

Biomechanical sensing system using wirelessly locatable tags

#1589
20220000251
2022-01-06

Fastener with a constrained retention ring

#1590
20220000229
2022-01-06

APPARATUS AND METHOD FOR WIRELESS EARPIECE HOLDER WITH ONE-HANDED OPERATION

#1591
20210409888
2021-12-30

Sound field adjustment

#1592
20210409887
2021-12-30

Sound field adjustment

#1593
20210409886
2021-12-30

Sound field adjustment

#1594
20210409883
2021-12-30

Low-latency audio networking

#1595
20210409881
2021-12-30

Wireless radio switching

#1596
20210409861
2021-12-30

Two-way wireless headphones

#1597
20210409860
2021-12-30

Systems, apparatus, and methods for acoustic transparency

#1598
20210409859
2021-12-30

INTEGRATED CAR SEAT EAR BUDS DEVICE

#1599
20210409856
2021-12-30

Point-to-multipoint data transmission method and device

#1600
20210407635
2021-12-30

Automated clinical documentation system and method

#1601
20210405957
2021-12-30

Portable audio device case with power-saving features

#1602
20210405956
2021-12-30

Scanner with host porting audio

#1603
20210400411
2021-12-23

AUDIO OUTPUT APPARATUS FOR WIRELESSLY RECEIVING DATA FROM ELECTRONIC DEVICE AND METHOD OF OPERATING THE SAME

#1604
20210400389
2021-12-23

TWS earphone interaction method and system using residual slots

#1605
20210400388
2021-12-23

Smart routing for audio output devices

#1606
20210400385
2021-12-23

Portable wireless speaker arrangement comprising replaceable casing with integrated battery

#1607
20210400376
2021-12-23

Multiple dispersion standalone stereo loudspeakers

#1608
20210400374
2021-12-23

TWS earphone communication method and system for TWS earphones

#1609
20210400371
2021-12-23

EARBUDS WITH ISOBARIC CHAMBERS TO MANIPULATE BASS RESPONSE

#1610
20210400367
2021-12-23

Method and system for synchronous audio playback of TWS earphones

#1611
20210399754
2021-12-23

Smart speaker

#1612
20210399578
2021-12-23

WIRELESS CHARGER FOR PLAYBACK DEVICES

#1613
20210398542
2021-12-23

Intelligent microphone having deep learning accelerator and random access memory

#1614
20210397405
2021-12-23

Multiple output control based on user input

#1615
20210397217
2021-12-23

Electronic device with sensors and display devices

#1616
20210394872
2021-12-23

Audio system for a vehicle and method of installing the audio system

#1617
20210392741
2021-12-16

Antenna application in wireless earphones

#1618
20210392428
2021-12-16

Magnetic earphones holder

#1619
20210392427
2021-12-16

Systems and methods for live conversation using hearing devices

#1620
20210391739
2021-12-16

Battery charging control for electronic devices

#1621
20210389923
2021-12-16

Display device

#1622
20210385893
2021-12-09

Communication method between multi devices in Bluetooth communication environment and electronic device therefor

#1623
20210385637
2021-12-09

Methods and systems for communicating with device cases

#1624
20210385593
2021-12-09

System and method for hybrid in-person and remote audio/visual conference broadcasting

#1625
20210385578
2021-12-09

SOUND AMPLIFYING FACILITY FOR HEADPHONE

#1626
20210385570
2021-12-09

Loudspeaker device

#1627
20210385568
2021-12-09

Keyless control device and earphone

#1628
20210385567
2021-12-09

Audio output device for obtaining biometric data and method of operating same

#1629
20210385566
2021-12-09

Wireless charging headphone

#1630
20210384649
2021-12-09

Devices, systems, and methods for directional antennas that protect sensitive zones

#1631
20210377672
2021-12-02

Electrostatic headphone with integrated amplifier

#1632
20210377658
2021-12-02

Default playback device designation

#1633
20210377647
2021-12-02

Headphones Workstation Assembly

#1634
20210377646
2021-12-02

SPLIT-TYPE WIRELESS EARPHONES

#1635
20210377645
2021-12-02

Acoustic output apparatus and method thereof

#1636
20210377642
2021-12-02

Method and apparatus for implementing automatic translation by using a plurality of TWS headsets connected in forwarding mode

#1637
20210376884
2021-12-02

Connected isochronous stream swapping

#1638
20210376883
2021-12-02

BLUETOOTH ATTACHMENT TO IN-FLIGHT ENTERTAINMENT SYSTEMS THAT MAINTAIN EXISTING FUNCTIONALITY

#1639
20210376881
2021-12-02

Wearable Device With Conductive Coil for Wireless Charging and Communicating

#1640
20210375302
2021-12-02

Device to amplify and clarify voice

#1641
20210375268
2021-12-02

Multi-purpose protective face mask

#1642
20210375245
2021-12-02

Integrated karaoke device

#1643
20210375105
2021-12-02

Haptic providing device and method for converting sound signal to haptic signal

#1644
20210373844
2021-12-02

Display device

#1645
20210368562
2021-11-25

Universal audio device pairing assistant

#1646
20210368269
2021-11-25

Stereo headphone and methods for content sharing and for authentication

#1647
20210368264
2021-11-25

Microphone array apparatus for bird detection and identification

#1648
20210368256
2021-11-25

Wireless earbud, charging box and charging system for wireless earbud

#1649
20210368255
2021-11-25

BONE CONDUCTION BLUETOOTH MONO EARSET

#1650
20210368253
2021-11-25

NECK-STRAP TYPE EARPHONE

#1651
20210365236
2021-11-25

Altering communications captured by an incident recording device

#1652
20210360364
2021-11-18

Wearable electronic device corrects an error where a user hears binaural sound

#1653
20210360342
2021-11-18

Host detection and acoustic module detection

#1654
20210357180
2021-11-18

Voice assistant for wireless earpieces

#1655
20210352422
2021-11-11

Sound normalization and frequency remapping using haptic feedback

#1656
20210352421
2021-11-11

Binaural hearing aid system providing a beamforming signal output and comprising an asymmetric valve state

#1657
20210352397
2021-11-11

Wireless earphone and method for controlling a wireless earphone

#1658
20210352396
2021-11-11

Earplug with wireless audio communication

#1659
20210352394
2021-11-11

TWS bone conduction earphone

#1660
20210352170
2021-11-11

Mobile system with wireless earbud

#1661
20210351601
2021-11-11

Wireless sound output device with charging function

#1662
20210349681
2021-11-11

Method and system for adaptive volume control

#1663
20210345985
2021-11-11

Self-auscultation device and method

#1664
20210345044
2021-11-04

Un-tethered wireless audio system

#1665
20210345033
2021-11-04

PORTABLE AUDIO EQUIPMENT

#1666
20210345032
2021-11-04

Wireless headphone system

#1667
20210345031
2021-11-04

Charging case for earbuds and interchangeable, rechargeable batteries

#1668
20210345030
2021-11-04

Cover for microphone-equipped earphone

#1669
20210344101
2021-11-04

A Probe-fed Antenna for Bluetooth Loudspeakers

#1670
20210337610
2021-10-28

Wireless communication method, terminal, audio component, device, and storage medium

#1671
20210337446
2021-10-28

Diversity Bluetooth system and method

#1672
20210337330
2021-10-28

Detecting audio paths between mobile devices and external devices

#1673
20210337322
2021-10-28

Head-wearable hearing instrument with improved co-existence of multiple communication interfaces

#1674
20210337297
2021-10-28

Earphone communication method

#1675
20210337293
2021-10-28

Silent voice input

#1676
20210337290
2021-10-28

Portable Bluetooth speaker device having complex functions

#1677
20210337289
2021-10-28

SOUNDBAR

#1678
20210337287
2021-10-28

Speaker device

#1679
20210335335
2021-10-28

System and method for creating and outputting music

#1680
20210329381
2021-10-21

Audio encoding with compressed ambience

#1681
20210329370
2021-10-21

METHOD FOR PROVIDING SERVICE USING EARSET

#1682
20210329367
2021-10-21

Convertible head wearable audio devices

#1683
20210329365
2021-10-21

Loudspeaker apparatus

#1684
20210329364
2021-10-21

Cable retraction mechanism for headphone devices

#1685
20210327467
2021-10-21

Management of media content playback

#1686
20210326100
2021-10-21

Audio response playback

#1687
20210321197
2021-10-14

Graphical user interface indicator for broadcaster presence

#1688
20210321194
2021-10-14

Modular speakers

#1689
20210321179
2021-10-14

Wireless audio systems

#1690
20210319801
2021-10-14

Shared speech processing network for multiple speech applications

#1691
20210319777
2021-10-14

Face mask for facilitating conversations

#1692
20210315337
2021-10-14

Freely-transformable multipurpose carrier

#1693
20210314702
2021-10-07

Playback device pairing

#1694
20210314699
2021-10-07

Loudspeaker with transmitter

#1695
20210314695
2021-10-07

Sound converting device having near-infrared ray emission function

#1696
20210314694
2021-10-07

Wireless high-fidelity mesh network audio transmission system

#1697
20210314692
2021-10-07

Power management of the modular ear-cup and ear-bud

#1698
20210314691
2021-10-07

Modular ear-cup and ear-bud

#1699
20210314519
2021-10-07

SPORTING EVENT TELEVISION BROADCAST EQUIPMENT AND SYSTEM

#1700
20210306749
2021-09-30

Systems and methods for broadcasting audio

#1701
20210306735
2021-09-30

Adaptive headphone system

#1702
20210306734
2021-09-30

Hearing sensitivity acquisition methods and devices

#1703
20210306731
2021-09-30

Multi-stage body engagement detection

#1704
20210306699
2021-09-30

Audio processing method and electronic device

#1705
20210306103
2021-09-30

Systems and methods including wireless data packet retransmission schemes

#1706
20210305823
2021-09-30

Charging dock for an intelligence loudspeaker box

#1707
20210303254
2021-09-30

WIRELESS SPEAKER SYSTEM

#1708
20210298657
2021-09-30

Wireless Sound Converting System Having Bio-Signal Sensing Function

#1709
20210298098
2021-09-23

True wireless solution for BT stereo audio playback

#1710
20210297778
2021-09-23

Audio interface apparatus and recording system

#1711
20210297777
2021-09-23

Optimized audio forwarding

#1712
20210297764
2021-09-23

Device for charging electronic devices and in-ear headphones

#1713
20210297762
2021-09-23

Amplifier circuit and methods of operation thereof

#1714
20210297524
2021-09-23

Managing iOS-based mobile communication devices by creative use of callkit API protocols

#1715
20210294565
2021-09-23

Changing companion communication device behavior based on status of wearable device

#1716
20210289296
2021-09-16

Audio processing using distributed machine learning model

#1717
20210289282
2021-09-16

Wireless earphone charger, wireless earphone and wireless earphone system

#1718
20210289281
2021-09-16

Acoustic output apparatus

#1719
20210287693
2021-09-16

Audio cancellation for voice recognition

#1720
20210286452
2021-09-16

STYLUS AND TOUCH DEVICE

#1721
20210286451
2021-09-16

Multifunctional stylus and touch device

#1722
20210281991
2021-09-09

Bluetooth communication system, electronic device and Bluetooth chip having low power consumption

#1723
20210281958
2021-09-09

Hearing device system and method for processing audio signals

#1724
20210281943
2021-09-09

Dynamic earbud profile

#1725
20210281941
2021-09-09

Wireless ear buds with proximity sensors

#1726
20210281939
2021-09-09

Bluetooth headset

#1727
20210281937
2021-09-09

Loudspeaker device

#1728
20210278876
2021-09-09

Alternating sampling method for non-echo duplex conversations on a wearable device with multiple speakers and microphones

#1729
20210274305
2021-09-02

Use of local link to support transmission of spatial audio in a virtual environment

#1730
20210274299
2021-09-02

System with speaker, transceiver and related devices and methods

#1731
20210274281
2021-09-02

Acoustic output apparatus

#1732
20210274280
2021-09-02

Acoustic output device and buttons thereof

#1733
20210274278
2021-09-02

Acoustic output apparatus

#1734
20210274276
2021-09-02

Earphone without covering an ear canal

#1735
20210274275
2021-09-02

Ear Bud Case Protective Case and Locating Device

#1736
20210274274
2021-09-02

Magnetic earphones holder

#1737
20210274273
2021-09-02

Portable listening device with sensors

#1738
20210271115
2021-09-02

Microphone noise reduction system and smart glasses using the system

#1739
20210267522
2021-09-02

Wireless earpiece with transcranial stimulation

#1740
20210267376
2021-09-02

HEAD SUPPORT DEVICE

#1741
20210267168
2021-09-02

Music providing system for non-human animal

#1742
20210266852
2021-08-26

SOFTWARE BASED AUDIO TIMING AND SYNCHRONIZATION

#1743
20210266717
2021-08-26

Dual signal wireless audio system and application

#1744
20210266655
2021-08-26

HEADSET CONFIGURATION MANAGEMENT

#1745
20210258691
2021-08-19

Content output device, audio system, and content output method

#1746
20210258689
2021-08-19

Microphone adapter for wireless audio systems

#1747
20210258673
2021-08-19

Ear-hook earphone with detachable microphone support

#1748
20210258649
2021-08-19

Media preference database

#1749
20210258035
2021-08-19

Full duplex transceiver amplifier assembly, communication system including same, and associated method

#1750
20210257981
2021-08-19

Audio monitoring system

#1751
20210257980
2021-08-19

Playback device group volume control

#1752
20210255823
2021-08-19

Electronic device and method for controlling audio output thereof

#1753
20210250710
2021-08-12

Hearing aid

#1754
20210250709
2021-08-12

Hearing aid

#1755
20210250679
2021-08-12

Throat headset system

#1756
20210250677
2021-08-12

Interactive control method and device of an earphone case, earphone case and storage medium

#1757
20210250676
2021-08-12

Ear wearable device

#1758
20210250674
2021-08-12

Audio output device and method to detect wearing thereof

#1759
20210250673
2021-08-12

Wireless blue-tooth earphone

#1760
20210250668
2021-08-12

Wooden or other dielectric capacitive touch interface and loudspeaker having same

#1761
20210250339
2021-08-12

SECURING COMMUNICATIONS VIA COMPUTING DEVICES

#1762
20210249892
2021-08-12

Dynamic adjustment of charging voltage supplied from a first device to a second device

#1763
20210249886
2021-08-12

Power receiving device and method for controlling a charging current

#1764
20210249758
2021-08-12

Spatial antenna diversity techniques

#1765
20210249030
2021-08-12

Method for improving sound quality and electronic device using same

#1766
20210248989
2021-08-12

APPARATUS AND METHOD FOR MOUNTING A SOUND MASKING DEVICE IN A HOTEL ROOM

#1767
20210247952
2021-08-12

Apparatus and method for converting audio output

#1768
20210247950
2021-08-12

Electronic device and method for controlling buffer

#1769
20210246696
2021-08-12

Pivot assembly and electronic device including the pivot assembly

#1770
20210243822
2021-08-05

SYSTEMS AND METHODS FOR WIRELESS SPEAKER COMMUNICATION

#1771
20210243518
2021-08-05

Acoustic output device and components thereof

#1772
20210243242
2021-08-05

Schemes capable of synchronizing native clocks and audio codec clocks of audio playing for bluetooth wireless devices

#1773
20210242564
2021-08-05

System and method for integration of an antenna element and front-end module co-located into a speaker chamber

#1774
20210241784
2021-08-05

Sound inspection system and sound inspection method

#1775
20210240436
2021-08-05

Portable streaming audio player

#1776
20210237659
2021-08-05

Modular removable speaker system

#1777
20210235195
2021-07-29

Vibration diaphragm, vibration assembly, sound generator and sound generator module

#1778
20210235193
2021-07-29

Audio play and acquisition method and apparatus, device, and readable storage medium

#1779
20210235183
2021-07-29

Method and system for upgrading program of TWS headset, and TWS headset

#1780
20210235181
2021-07-29

Acoustic output apparatus

#1781
20210235178
2021-07-29

SLIDING RAIL STRUCTURE OF MOBILE POWER SUPPLY

#1782
20210235177
2021-07-29

Wireless sound-emitting device and system for remotely controlling a sound-emitting device

#1783
20210235176
2021-07-29

Electronic device

#1784
20210227485
2021-07-22

Synchronization of content between networked devices

#1785
20210227370
2021-07-22

Wireless bluetooth communication mechanism capable of effectively reducing number of audio packet retransmission

#1786
20210227317
2021-07-22

System for reducing vibrations in loudspeaker

#1787
20210227314
2021-07-22

Noise-reducing earphone with adjustable voice

#1788
20210227312
2021-07-22

Headphone systems and methods for emulating the audio performance of multiple distinct headphone models

#1789
20210227306
2021-07-22

Audio glasses

#1790
20210226599
2021-07-22

Headset communication system

#1791
20210224371
2021-07-22

Digital signature using phonometry and compiled biometric data system and method

#1792
20210224028
2021-07-22

Audio output device and method for controlling output speed of audio data thereof

#1793
20210224024
2021-07-22

BLUETOOTH AUDIO SYSTEM WITH LOW LATENCY, AND AUDIO SOURCE AND AUDIO SINK THEREOF

#1794
20210223577
2021-07-22

Acoustic output device

#1795
20210219914
2021-07-22

Monitoring Earphone Intended for Autism Spectrum Disorder

#1796
20210219754
2021-07-22

Waterproof lid with bluetooth speaker integration

#1797
20210219089
2021-07-15

Spatial repositioning of multiple audio streams

#1798
20210219082
2021-07-15

Orientation-based playback device microphone selection

#1799
20210219081
2021-07-15

Calibration method for hearing protection devices

#1800
20210219057
2021-07-15

True wireless multichannel-speakers device and multiple sound source voicing method thereof