ClassID:

232067

H04R25/453 - CPC Classification

Classification description:

Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception; Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically

Recent Application in this class:
#1
20260149936
2026-05-28

SIGNAL ENHANCEMENT USING A NOISE REDUCTION CONNECTIVITY METHOD

#2
20260149922
2026-05-28

ACOUSTIC FEEDBACK PROCESSING SYSTEM AND METHOD

#3
20260143287
2026-05-21

HEARING DEVICE WITH MOTION SENSOR USED TO DETECT FEEDBACK PATH INSTABILITY

#4
20260143286
2026-05-21

ADJUSTING FEEDBACK CANCELLER ADAPTATION IN RESPONSE TO ENTRAINMENT IN EAR-WORN DEVICES

#5
20260120706
2026-04-30

Voice Data Processing for Hearing Aid

#6
20260107095
2026-04-16

SUB-BAND ACOUSTIC FEEDBACK CANCELLATION WITH FORWARD-PATH DECORRELATION

#7
20260046570
2026-02-12

HEARING AID COMPRISING A LOOP TRANSFER FUNCTION ESTIMATOR AND A METHOD OF TRAINING A LOOP TRANSFER FUNCTION ESTIMATOR

#8
20260046569
2026-02-12

HEARING DEVICE WITH MACHINE LEARNING MODEL TO DETERMINE DIRECTION OF ARRIVAL

#9
20260025622
2026-01-22

ACTIVE NOISE CONTROL FOR SOUND QUALITY IN HEARING DEVICES

#10
20260019757
2026-01-15

ARTIFACT DETECTION AND LOGGING FOR TUNING OF FEEDBACK CANCELLER

#11
20250366738
2025-12-04

HEARING CORRECTION SYSTEM

#12
20250365545
2025-11-27

PREDICTING GAIN MARGIN IN A HEARING DEVICE USING A NEURAL NETWORK

#13
20250344026
2025-11-06

Personalized Acoustic Feedback Management

#14
20250317700
2025-10-09

METHOD, APPARATUS AND SYSTEM FOR NEURAL NETWORK ENABLED HEARING AID

#15
20250317696
2025-10-09

METHOD FOR OPERATING A HEARING DEVICE, AND HEARING DEVICE SYSTEM

#16
20250310702
2025-10-02

Hearing Assistance using Active Noise Reduction

#17
20250308526
2025-10-02

PERSONALIZED SOUND MANAGEMENT AND METHOD

#18
20250294298
2025-09-18

HEARING AID SYSTEM AND A METHOD OF OPERATING A HEARING AID SYSTEM

#19
20250225970
2025-07-10

SIGNAL PROCESSING METHOD AND ACOUSTIC SYSTEM

#20
20250220363
2025-07-03

SIGNAL PROCESSING METHOD AND ACOUSTIC SYSTEM

#21
20250220362
2025-07-03

HEARING AID DEVICE COMPRISING A SENSOR MEMBER

#22
20250211923
2025-06-26

PROXIMITY SENSOR USED FOR FEEDBACK CANCELLATION ADJUSTMENT IN A HEARING DEVICE

#23
20250193592
2025-06-12

ARTIFICIAL INTELLIGENCE (AI) ACOUSTIC FEEDBACK SUPPRESSION

#24
20250184674
2025-06-05

IN-USE FEEDBACK PATH CHARACTERIZATION FOR HEARING DEVICE

#25
20250184672
2025-06-05

HEARING DEVICE COMPRISING AN INPUT TRANSDUCER IN THE EAR

#26
20250168572
2025-05-22

HEARING DEVICE WITH ACTIVE NOISE CANCELLATION

#27
20250133355
2025-04-24

Feedback cancellation in a hearing aid device using tap coherence values

#28
20250064403
2025-02-27

OBSERVER-BASED CANCELLATION SYSTEM FOR IMPLANTABLE HEARING INSTRUMENTS

#29
20250056167
2025-02-13

HEARING AID DEVICE WITH IMPROVED FEEDBACK SUPPRESSION AND A SUPPRESSION METHOD

#30
20250048040
2025-02-06

HEARING DEVICE COMPRISING AN AMPLIFIER SYSTEM FOR MINIMIZING VARIATION IN AN ACOUSTICAL SIGNAL CAUSED BY VARIATION IN GAIN OF AN AMPLIFIER

#31
20250047254
2025-02-06

AUDIO PROCESSING DEVICE, SYSTEM, USE AND METHOD IN WHICH ONE OF A PLURALITY OF CODING SCHEMES FOR DISTRIBUTING PULSES TO AN ELECTRODE ARRAY IS SELECTED BASED ON CHARACTERISTICS OF INCOMING SOUND

#32
20250030991
2025-01-23

TELECOIL SYSTEM PERIODIC INTERFERENCE CANCELLER

#33
20250030990
2025-01-23

TELECOIL PREDICTED REPEATING SYSTEM INTERFERENCE CANCELLER

#34
20250024209
2025-01-16

HEARING AID DETERMINING TALKERS OF INTEREST

#35
20240373173
2024-11-07

HEARING AID AND INTRA-ORAL DEVICE THEREOF, EXTERNAL DEVICE, CONTROL METHOD AND CONTROL APPARATUS, AND STORAGE MEDIUM

#36
20240348994
2024-10-17

NEURAL NETWORK-DRIVEN FEEDBACK CANCELLATION

#37
20240334133
2024-10-03

Tone Detection in Hearing Device Audio Signals

#38
20240312456
2024-09-19

Personalized Sound Management and Method

#39
20240298121
2024-09-05

HEARING DEVICE WITH MOTION SENSOR USED TO DETECT FEEDBACK PATH INSTABILITY

#40
20240236586
2024-07-11

HOWLING SUPPRESSION METHOD, HEARING AID, AND STORAGE MEDIUM

#41
20240163618
2024-05-16

Eardrum acoustic pressure estimation using feedback canceller

#42
20240163617
2024-05-16

HEARING AID LISTENING TEST PROFILES

#43
20240147169
2024-05-02

A HEARING AID SYSTEM AND A METHOD OF OPERATING A HEARING AID SYSTEM

#44
20240137713
2024-04-25

HOWLING SUPPRESSION METHOD, HEARING AID, AND STORAGE MEDIUM

#45
20240129674
2024-04-18

METHOD, APPARATUS AND SYSTEM FOR NEURAL NETWORK ENABLED HEARING AID

#46
20240121561
2024-04-11

Hearing aid device comprising a sensor member

#47
20240114296
2024-04-04

HEARING AID COMPRISING A SPEAKER UNIT

#48
20240089677
2024-03-14

METHOD AND APPARATUS FOR OWN-VOICE SENSING IN A HEARING ASSISTANCE DEVICE

#49
20240064478
2024-02-22

MEHOD OF REDUCING WIND NOISE IN A HEARING DEVICE

#50
20240064477
2024-02-22

ACTIVE NOISE CONTROL FOR SOUND QUALITY IN HEARING DEVICES

#51
20240064476
2024-02-22

Hearing device comprising an input transducer in the ear

#52
20240048918
2024-02-08

Mobile hearing aid having foldable earphone and howling prevention circuit

#53
20240022864
2024-01-18

DEEP LEARNING-BASED METHOD FOR ACOUSTIC FEEDBACK SUPPRESSION IN CLOSED-LOOP SYSTEM

#54
20240007802
2024-01-04

HEARING AID COMPRISING A COMBINED FEEDBACK AND ACTIVE NOISE CANCELLATION SYSTEM

#55
20240007801
2024-01-04

METHOD OF SUPPRESSING ACOUSTIC FEEDBACK IN A BINAURAL HEARING AID SYSTEM

#56
20230421971
2023-12-28

HEARING AID COMPRISING AN ACTIVE OCCLUSION CANCELLATION SYSTEM

#57
20230388725
2023-11-30

Method, apparatus and system for neural network enabled hearing aid

#58
20230388724
2023-11-30

PREDICTING GAIN MARGIN IN A HEARING DEVICE USING A NEURAL NETWORK

#59
20230370789
2023-11-16

EXECUTION AND INITIALISATION OF PROCESSES FOR A DEVICE

#60
20230362554
2023-11-09

PROSTHESIS STATE AND FEEDBACK PATH BASED PARAMETER MANAGEMENT

#61
20230328463
2023-10-12

Neural network-driven feedback cancellation

#62
20230319492
2023-10-05

ADAPTIVE BINAURAL FILTERING FOR LISTENING SYSTEM USING REMOTE SIGNAL SOURCES AND ON-EAR MICROPHONES

#63
20230319488
2023-10-05

CROSSTALK CANCELLATION AND ADAPTIVE BINAURAL FILTERING FOR LISTENING SYSTEM USING REMOTE SIGNAL SOURCES AND ON-EAR MICROPHONES

#64
20230283968
2023-09-07

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

#65
20230254649
2023-08-10

METHOD OF DETECTING A SUDDEN CHANGE IN A FEEDBACK/ECHO PATH OF A HEARING AID

#66
20230254648
2023-08-10

Hearables and hearing aids with proximity-based adaptation

#67
20230239634
2023-07-27

Apparatus and method for reverberation mitigation in a hearing device

#68
20230232169
2023-07-20

Method, apparatus and system for neural network hearing aid

#69
20230197080
2023-06-22

Personalized sound management and method

#70
20230143347
2023-05-11

Hearing device with feedback instability detector that changes an adaptive filter

#71
20230121895
2023-04-20

Hearing device comprising a feedback control system

#72
20230116563
2023-04-13

ARTIFACT DETECTION AND LOGGING FOR TUNING OF FEEDBACK CANCELLER

#73
20230073936
2023-03-09

Hearing aid device comprising a sensor member

#74
20230051386
2023-02-16

Detection of feedback path change

#75
20230048848
2023-02-16

Feedback control using a correlation measure

#76
20230044509
2023-02-09

HEARING DEVICE COMPRISING A FEEDBACK CONTROL SYSTEM

#77
20230035448
2023-02-02

Hearing device comprising a microphone adapted to be located at or in the ear canal of a user

#78
20230020280
2023-01-19

Eardrum acoustic pressure estimation using feedback canceller

#79
20220394371
2022-12-08

Ear-worn electronic system employing in-ear device and battery charging using at-ear device battery charger

#80
20220369045
2022-11-17

Audio feedback reduction system for hearing assistance devices, audio feedback reduction method and non-transitory machine-readable storage medium

#81
20220360911
2022-11-10

Mitigating acoustic feedback in hearing aids with frequency warping by all-pass networks

#82
20220353624
2022-11-03

Ear-worn electronic system employing cooperative operation between in-ear device and at-ear device

#83
20220353623
2022-11-03

Hearing device comprising an input transducer in the ear

#84
20220345832
2022-10-27

Detection of feedback path change

#85
20220322019
2022-10-06

Method and system of fitting a hearing device

#86
20220312129
2022-09-29

Feedback elimination in a hearing aid

#87
20220295191
2022-09-15

Hearing aid determining talkers of interest

#88
20220286790
2022-09-08

Hearing device comprising a delayless adaptive filter

#89
20220279289
2022-09-01

Prosthesis state and feedback path based parameter management

#90
20220272463
2022-08-25

Method for providing occluded sound effect and electronic device

#91
20220264232
2022-08-18

Hearing aid comprising an open loop gain estimator

#92
20220264231
2022-08-18

Hearing aid comprising a feedback control system

#93
20220262361
2022-08-18

Personalized sound management and method

#94
20220232331
2022-07-21

Hearing device comprising a recurrent neural network and a method of processing an audio signal

#95
20220210581
2022-06-30

Hearing aid comprising a feedback control system

#96
20220201405
2022-06-23

HEARING DEVICE WITH ACTIVE FEEDBACK CONTROL

#97
20220174430
2022-06-02

Hearing Assistance using Active Noise Reduction

#98
20220149800
2022-05-12

Audio processing device, system, use and method in which one of a plurality of coding schemes for distributing pulses to an electrode array is selected based on characteristics of incoming sound

#99
20220148558
2022-05-12

FEEDBACK CANCELLATION DIVERGENCE PREVENTION

#100
20220132256
2022-04-28

Distortion compensation for bone anchored hearing device

#101
20220046363
2022-02-10

Feedback control using a correlation measure

#102
20220044077
2022-02-10

Machine learning model capability assessment

#103
20220014857
2022-01-13

Hearing aid device comprising a sensor member

#104
20220007115
2022-01-06

HEARING SYSTEM HAVING IMPROVED HIGH FREQUENCY RESPONSE

#105
20210385587
2021-12-09

Hearing assistance device

#106
20210377673
2021-12-02

Method of determining a status of an acoustic feedback path of a head wearable hearing device and a head wearable hearing device

#107
20210368280
2021-11-25

METHOD FOR OPERATING A HEARING AID AND HEARING AID

#108
20210337321
2021-10-28

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

#109
20210274293
2021-09-02

Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management

#110
20210258702
2021-08-19

Method of testing microphone performance of a hearing aid system and a hearing aid system

#111
20210243534
2021-08-05

Acoustic feedback event monitoring system for hearing assistance devices

#112
20210211812
2021-07-08

Personal hearing device, external acoustic processing device and associated computer program product

#113
20210201907
2021-07-01

Personalized sound management and method

#114
20210195345
2021-06-24

Neural network-driven feedback cancellation

#115
20210185454
2021-06-17

Method of determining a status of an acoustic feedback path of a head wearable hearing device and a head wearable hearing device

#116
20210152947
2021-05-20

Systems and methods for adjusting a gain limit of a hearing device

#117
20210144494
2021-05-13

Accoustic feedback path modeling for hearing assistance device

#118
20210120347
2021-04-22

Method and apparatus for own-voice sensing in a hearing assistance device

#119
20210092532
2021-03-25

Intra ear canal hearing aid

#120
20210092531
2021-03-25

Method of adaptive mixing of uncorrelated or correlated noisy signals, and a hearing device

#121
20210067885
2021-03-04

Hearing device comprising a beamformer filtering unit for reducing feedback

#122
20210021940
2021-01-21

Hearing device comprising a feedback reduction system

#123
20200345243
2020-11-05

Apparatus, systems and methods for monitoring and evaluating cardiopulmonary functioning

#124
20200336847
2020-10-22

Hearing assistance device with brain computer interface

#125
20200322736
2020-10-08

Hearing device comprising a microphone adapted to be located at or in the ear canal of a user

#126
20200280809
2020-09-03

Sound level control for hearing assistive devices

#127
20200275219
2020-08-27

Hearing aid having an adaptive classifier

#128
20200275217
2020-08-27

Hearing device comprising a loop gain limiter

#129
20200245080
2020-07-30

Hearing assistance using active noise reduction

#130
20200236474
2020-07-23

Execution and initialisation of processes for a device

#131
20200236472
2020-07-23

Observer-based cancellation system for implantable hearing instruments

#132
20200213778
2020-07-02

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

#133
20200204935
2020-06-25

Magnet positioning in an external device

#134
20200204930
2020-06-25

Hearing device with sound impulse suppression and related method

#135
20200204929
2020-06-25

Hearing device with active feedback control

#136
20200204136
2020-06-25

Audio processing device, system, use and method in which one of a plurality of coding schemes for distributing pulses to an electrode array is selected based on characteristics of incoming sound

#137
20200154215
2020-05-14

Configuration of feedback cancelation for hearing aids

#138
20200120433
2020-04-16

Method for operating a hearing instrument and a hearing system containing a hearing instrument

#139
20200120429
2020-04-16

Terminal, and operation method for terminal

#140
20200107138
2020-04-02

Method of estimating a feedback path of a hearing aid and a hearing aid

#141
20200084553
2020-03-12

Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management

#142
20200077204
2020-03-05

Hearing aid device comprising a sensor member

#143
20200066276
2020-02-27

Personalized sound management and method

#144
20200045481
2020-02-06

Hearing aid having an adaptive classifier

#145
20200037083
2020-01-30

HEARING AID AND HEARING AID DUAL USE DONGLE

#146
20200037082
2020-01-30

HEARING SYSTEM HAVING IMPROVED HIGH FREQUENCY RESPONSE

#147
20200021922
2020-01-16

HEARING AID AND HEARING AID DUAL USE DONGLE

#148
20200007994
2020-01-02

BINAURAL HEARING AID AND METHOD OF REDUCING NOISE GENERATED BY TOUCHING HEARING AID

#149
20190394586
2019-12-26

Hearing device comprising an acoustic event detector

#150
20190394576
2019-12-26

Hearing device comprising a feedback reduction system

#151
20190373379
2019-12-05

Method for reducing the occurrence of acoustic feedback in a hearing device and hearing device

#152
20190357777
2019-11-28

Apparatus, systems and methods for obtaining cleaner physiological information signals

#153
20190356990
2019-11-21

Method of operating a hearing device and hearing device

#154
20190327570
2019-10-24

Hearing assistance device with brain computer interface

#155
20190320268
2019-10-17

SYSTEMS, DEVICES AND METHODS FOR EXECUTING A DIGITAL AUDIOGRAM

#156
20190297433
2019-09-26

Hearing device comprising a feedback detection unit

#157
20190297432
2019-09-26

Hearing assistive device with increased dynamic input range

#158
20190253817
2019-08-15

Method of fitting a hearing device to a user's needs, a programming device, and a hearing system

#159
20190253813
2019-08-15

Hearing device comprising a beamformer filtering unit for reducing feedback

#160
20190239006
2019-08-01

Hearing aid including a vibrator touching a pinna

#161
20190230448
2019-07-25

Non-occluding feedback-resistant hearing device

#162
20190222699
2019-07-18

Adaptive filter unit for being used as an echo canceller

#163
20190215618
2019-07-11

Prosthesis state and feedback path based parameter management

#164
20190208340
2019-07-04

Hearing aid having an adaptive classifier

#165
20190208334
2019-07-04

Hearing device comprising a microphone adapted to be located at or in the ear canal of a user

#166
20190208333
2019-07-04

Parametrically formulated noise and audio systems, devices, and methods thereof

#167
20190198037
2019-06-27

Method of managing adaptive feedback cancellation in hearing devices and hearing devices configured to carry out such method

#168
20190191253
2019-06-20

Audio systems, devices, and methods

#169
20190181823
2019-06-13

Audio processing device, system, and method in which frequency bands of an input audio signal are bundled and allocated to channels for processing

#170
20190158964
2019-05-23

Integrated personal amplifier system with howling control

#171
20190158963
2019-05-23

Method of operating a hearing device and a hearing device

#172
20190132686
2019-05-02

Feedback detector and a hearing device comprising a feedback detector

#173
20190082274
2019-03-14

Wireless body worn personal device with loss detection functionality

#174
20190075405
2019-03-07

Method for operating a hearing device, hearing device and binaural hearing device system

#175
20190069097
2019-02-28

Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management

#176
20190069096
2019-02-28

Hearing aid device including a self-checking unit for determine status of one or more features of the hearing aid device based on feedback response

#177
20190045308
2019-02-07

Binaural hearing systems and methods for preserving an interaural level difference between signals generated for each ear of a user

#178
20190037321
2019-01-31

HEARING AID DEVICE AND METHOD FOR FEEDBACK REDUCTION

#179
20190028820
2019-01-24

Magnet positioning in an external device

#180
20190028818
2019-01-24

Feedback canceller and hearing aid

#181
20190020959
2019-01-17

Hearing aid having a classifier for classifying auditory environments and sharing settings

#182
20180376258
2018-12-27

Hearing device with suppression of comb filtering effect

#183
20180361151
2018-12-20

Interference suppression in tissue-stimulating prostheses

#184
20180359572
2018-12-13

Microphone system and a hearing device comprising a microphone system

#185
20180317025
2018-11-01

A SENSOR COMPRISING TWO PARALLEL ACOUSTICAL FILTER ELEMENTS, AN ASSEMBLY COMPRISING A SENSOR AND THE FILTER, A HEARABLE AND A METHOD

#186
20180262846
2018-09-13

HEARING SYSTEM HAVING IMPROVED HIGH FREQUENCY RESPONSE

#187
20180255407
2018-09-06

Method for frequency distortion of an audio signal, method for suppressing an acoustic feedback in an acoustic system and hearing aid

#188
20180255405
2018-09-06

Method for distorting the frequency of an audio signal and hearing apparatus operating according to this method

#189
20180228381
2018-08-16

Earpiece monitor

#190
20180227677
2018-08-09

Binaural hearing assistance operation

#191
20180220906
2018-08-09

Physiological monitoring apparatus and networks

#192
20180220904
2018-08-09

Apparatus, systems and methods for obtaining cleaner physiological information signals

#193
20180220902
2018-08-09

Wearable apparatus

#194
20180213336
2018-07-26

Method for operating a binaural hearing aid system and a binaural hearing aid system

#195
20180199141
2018-07-12

Method and hearing aid for the frequency distortion of an audio signal

#196
20180192209
2018-07-05

Binaural hearing systems and methods for preserving an interaural level difference to a distinct degree for each ear of a user

#197
20180184916
2018-07-05

Physiological monitoring apparatus

#198
20180184219
2018-06-28

Active occlusion cancellation

#199
20180184217
2018-06-28

Method for operating a hearing aid and hearing aid

#200
20180184216
2018-06-28

Hearing device with sound impulse suppression and related method

#201
20180176695
2018-06-21

Integrated circuit component for a hearing assistive device

#202
20180167747
2018-06-14

Method of reducing noise in an audio processing device

#203
20180160239
2018-06-07

Sound level control for hearing assistive devices

#204
20180160238
2018-06-07

Method and apparatus for own-voice sensing in a hearing assistance device

#205
20180160237
2018-06-07

Configuration of feedback cancelation for hearing aids

#206
20180139546
2018-05-17

Hearing apparatus with a facility for reducing a microphone noise and method for reducing microphone noise

#207
20180124524
2018-05-03

Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier

#208
20180115839
2018-04-26

Hearing assistance using active noise reduction

#209
20180109886
2018-04-19

Method of operating a hearing aid system and a hearing aid system

#210
20180109882
2018-04-19

Method of operating a hearing aid system and a hearing aid system

#211
20180103329
2018-04-12

Binaural hearing system and method

#212
20180077502
2018-03-15

Hearing aid device comprising a sensor member

#213
20180070186
2018-03-08

Hearing aid having an adaptive classifier

#214
20180070185
2018-03-08

Hearing device

#215
20180063654
2018-03-01

Hearing device comprising a feedback detection unit

#216
20180063652
2018-03-01

Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management

#217
20180063651
2018-03-01

Method and apparatus for robust acoustic feedback cancellation

#218
20180041846
2018-02-08

Method for feedback suppression

#219
20180041845
2018-02-08

Hearing device comprising a feedback cancellation system based on signal energy relocation

#220
20180027341
2018-01-25

Acoustic feedback event monitoring system for hearing assistance devices

#221
20180020295
2018-01-18

PERSONAL LISTENING DEVICE, IN PARTICULAR A HEARING AID

#222
20180007476
2018-01-04

Method for detecting tonal signals, a method for operating a hearing device based on detecting tonal signals and a hearing device with a feedback canceller using a tonal signal detector

#223
20170339496
2017-11-23

Methods for hearing-assist systems in various venues

#224
20170339495
2017-11-23

Configurable hearing aid comprising a beamformer filtering unit and a gain unit

#225
20170332181
2017-11-16

Binaural hearing aid system with feedback suppression

#226
20170332180
2017-11-16

Feedback reduction for high frequencies

#227
20170325032
2017-11-09

Sound collection equipment and method for detecting the operation status of sound collection equipment

#228
20170311095
2017-10-26

NEURAL NETWORK-DRIVEN FEEDBACK CANCELLATION

#229
20170311091
2017-10-26

Tonality-driven feedback canceler adaptation

#230
20170289706
2017-10-05

Algorithm and wearing option interaction with a vibratory prosthesis

#231
20170289705
2017-10-05

Execution and initialisation of processes for a device

#232
20170208398
2017-07-20

Systems, devices, components and methods for reducing feedback between microphones and transducers in bone conduction magnetic hearing devices

#233
20170201838
2017-07-13

Interface device, a cellular phone protection shell and an arrangement thereof

#234
20170201836
2017-07-13

Integrated personal amplifier system with howling control

#235
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