ClassID:

232124

H04R2203/00 - CPC Classification

Classification description:

Details of circuits for transducers, loudspeakers or microphones covered by but not provided for in any of its subgroups

Sub-classes:
Recent Application in this class:
#1
20230163735
2023-05-25

METHOD AND SYSTEM FOR INCREASING EFFICIENCY IN AUDIO AMPLIFIERS

#2
20220337243
2022-10-20

Microphone with slew rate controlled buffer

#3
20220004272
2022-01-06

Audio device with flexible circuit for capacitive interface

#4
20200314534
2020-10-01

Sound reproducing apparatus, sound reproducing method, and computer readable storage medium

#5
20190394592
2019-12-26

Always-on detection systems

#6
20190230458
2019-07-25

Always-on detection systems

#7
20190090042
2019-03-21

Condenser microphone circuit

#8
20190052966
2019-02-14

HEADPHONE

#9
20180109902
2018-04-19

Method and system for enhancing sound effect when using virtual reality glasses

#10
20170188167
2017-06-29

Notifying a user to improve voice quality

#11
20170085986
2017-03-23

Protection of a speaker from thermal damage

#12
20160345092
2016-11-24

Audio capture apparatus

#13
20160198269
2016-07-07

Headphone

#14
20160192050
2016-06-30

Smart flexible interactive earplug

#15
20160173980
2016-06-16

Solid state relay circuit arrangement for audio signals and switching system

#16
20160057533
2016-02-25

Electromechanical system with predictive back-EMF protection

#17
20150139437
2015-05-21

Signal processing circuit and associated signal processing method applied to headset

#18
20150063590
2015-03-05

Sound source separating apparatus, sound source separating program, sound pickup apparatus, and sound pickup program

#19
20140348335
2014-11-27

Audio measurement amplifier

#20
20130145611
2013-06-13

Method for manufacturing an ultrasound imaging transducer assembly

#21
20120213390
2012-08-23

Condenser microphone

#22
20110317853
2011-12-29

Heyser spiral low frequency correction of FIR filters

#23
20110088248
2011-04-21

Method for manufacturing an ultrasound imaging transducer assembly

#24
20100327698
2010-12-30

Diagnostic ultrasound transducer

#25
20090034370
2009-02-05

Diagnostic ultrasound transducer