H04R19/01 - CPC Classification Index

ClassID:

232031 ⎘

H04R19/01 - CPC Classification

Classification description:

Electrostatic transducers characterised by the use of electrets

Sub-classes:

H04R19/013 » {for loudspeakers} 79
H04R19/016 » {for microphones} 336

Recent Application in this class:

20230047408

2023-02-16

Acoustic microphone arrays

20220417669

2022-12-29

GRAPHENE TRANSDUCERS

20220274826

2022-09-01

Micro-electromechanical transducer

20210349140

2021-11-11

Sensing arrangement

20210249195

2021-08-12

Electret sheet

20210185451

2021-06-17

Electret

20210099103

2021-04-01

Actuator

20210017015

2021-01-21

Micro-electromechanical transducer

20200204926

2020-06-25

ULTRA-LOW DISTORTION MICROPHONE BUFFER

#10

20190306638

2019-10-03

Low-cost hearing aid platforms and methods of use

#11

20190272845

2019-09-05

System and method for monitoring dietary activity

#12

20190165695

2019-05-30

Semiconductor device

#13

20190043672

2019-02-07

Electret sheet

#14

20180375482

2018-12-27

ADAPTIVE-SNR ULTRA-LOW-POWER ULTRA-LOW-NOISE MICROPHONE

#15

20180348877

2018-12-06

Gesture recognition apparatus and components thereof

#16

20180206043

2018-07-19

AN ULTRA-LOW-POWER ULTRA-LOW-NOISE MICROPHONE

#17

20180186622

2018-07-05

Micro-electromechanical transducer

#18

20170366891

2017-12-21

APPARATUS FOR CONTROLLING AN EARPHONE OR A MEDIA PLAYER IN COMMUNICATION WITH THE EARPHONE, AND CONTROLLING METHOD THEREOF

#19

20170318395

2017-11-02

Micro-electro-mechanical system microphone with dual backplates

#20

20160345083

2016-11-24

Compact electroacoustic transducer and loudspeaker system and method of use thereof

#21

20160218688

2016-07-28

Preamplifier circuit for a microelectromechanical capacitive acoustic transducer

#22

20160210051

2016-07-21

Low power voice trigger for acoustic apparatus and method

#23

20150125008

2015-05-07

Frequency dependent switch

#24

20150098592

2015-04-09

Electrodynamic acoustic transducer, condenser microphone and condenser headphones

#25

20150071468

2015-03-12

Electrostatic electroacoustic transducer and fabricating methods for the same

#26

20150063608

2015-03-05

Capacitive MEMS element including a pressure-sensitive diaphragm

#27

20140307897

2014-10-16

Electrostatic speaker

#28

20140037113

2014-02-06

Preamplifier circuit for a microelectromechanical capacitive acoustic transducer

#29

20120275621

2012-11-01

Surface-mounted microphone arrays on flexible printed circuit boards

#30

20120230522

2012-09-13

Electroacoustic sound transducer

#31

20120230517

2012-09-13

Electronic device

#32

20120002826

2012-01-05

ELECTRET ELECTROACOUSTIC TRANSDUCER

#33

20110263788

2011-10-27

Process for producing electret, and electrostatic induction conversion device

#34

20110263785

2011-10-27

Process for producing electret, and electrostatic induction conversion device

#35

20110255721

2011-10-20

Flat speaker unit and speaker device therewith

#36

20110216923

2011-09-08

STRUCTURE OF FLEXIBLE SPEAKER

#37

20100329487

2010-12-30

Preamplifier circuit for a microelectromechanical capacitive acoustic transducer

#38

20100008525

2010-01-14

Acoustic actuator plate structure

#39

20090267168

2009-10-29

Electret capacitor type composite sensor

#40

20090129621

2009-05-21

Portable electronic apparatus with microphones

#41

20090060234

2009-03-05

Speaker structure

#42

20090060230

2009-03-05

ELECTROMECHANICAL TRANSDUCER AND A PRODUCTION METHOD

#43

20090058228

2009-03-05

Ultrasonic transducer, method of manufacturing ultrasonic transducer, ultrasonic diagnostic apparatus, and ultrasonic microscope

#44

20090017295

2009-01-15

Fluorinated cyclic olefin electret film

#45

20090016551

2009-01-15

Electrostatic electroacoustic transducers

#46

20080048521

2008-02-28

Electric power generator

#47

20080008347

2008-01-10

Acoustic Transducer

#48

20070116305

2007-05-24

Electro-acoustic transducer

#49

20060188728

2006-08-24

Material for heat-resistant electret and heat-resistant electret

#50

20060188112

2006-08-24

Condenser microphone and method for manufacturing the same

#51

20060109998

2006-05-25

System and method for RF immunity of electret condenser microphone

#52

20060066934

2006-03-30

Double-electret mems actuator

#53

20050002536

2005-01-06

Ultrasonic transducer