ClassID:

232008

H04R9/18 - CPC Classification

Classification description:

Transducers of moving-coil, moving-strip, or moving-wire type Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Recent Application in this class:
#1
20240244384
2024-07-18

DUAL ACTUATOR BONE CONDUCTION HEARING PROSTHESIS

#2
20230384147
2023-11-30

VIBRATION SENSORS

#3
20230262396
2023-08-17

AUDIO-TACTILE TRANSDUCER DEVICE BASED ON DIELECTRIC ELECTRO-ACTIVE ELASTOMERS

#4
20220232327
2022-07-21

Magnetic potential transducer and electronic apparatus using same

#5
20220150642
2022-05-12

Vibration actuator for rigid structures for high-performance bass playback in automobiles

#6
20220078559
2022-03-10

Speaker and terminal device

#7
20220078558
2022-03-10

Speaker and terminal device

#8
20210258694
2021-08-19

Vibration speaker for vehicle and control method thereof

#9
20200413201
2020-12-31

Sound generator

#10
20200342154
2020-10-29

Method and electronic circuit for improving a driving force function of an electrodynamic acoustic transducer

#11
20190028799
2019-01-24

Signal processing method of audio sensing device, and audio sensing system

#12
20180319333
2018-11-08

Motor vehicle sound generator system

#13
20180213320
2018-07-26

Methods and systems for optimizing acoustic transducer performance

#14
20180170255
2018-06-21

Notification device and notification method

#15
20180047376
2018-02-15

System for providing vibrations remotely from a vibrating transducer

#16
20170311077
2017-10-26

Audio signal correction and calibration for a room environment

#17
20170245042
2017-08-24

Speakers and headphones related to vibrations in an audio system, and methods for operating same

#18
20170195796
2017-07-06

Microspeaker with improved high frequency extension

#19
20160316295
2016-10-27

Audio signal correction and calibration for a room environment

#20
20160234588
2016-08-11

Speakers and headphones related to vibrations in an audio system, and methods for operating same

#21
20150172805
2015-06-18

Apparatus and methods related to a tactile vibrator for a speaker system

#22
20150003658
2015-01-01

Speaker device

#23
20140161281
2014-06-12

Audio signal correction and calibration for a room environment

#24
20130064391
2013-03-14

Acoustic beam forming array using feedback-controlled microphones for tuning and self-matching of frequency response

#25
20080056527
2008-03-06

High power low frequency transducers and method of assembly