H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems

More topics under "H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems" (141,872)
H04R 1 - Details of transducers (42,173)
H04R 11 - Transducers of moving-armature or moving-core type (1,828)
H04R 13 - Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet (404)
H04R 15 - Magnetostrictive transducers (423)
H04R 17 - Piezo-electric transducers; Electrostrictive transducers (7,213)
H04R 19 - Electrostatic transducers (5,387)
H04R 21 - Variable-resistance transducers (174)
H04R 23 - Transducers other than those covered by groups (1,562)
H04R 25 - Deaf-aid sets (22,418)
H04R 27 - Public address systems (2,454)
H04R 29 - Monitoring arrangements; Testing arrangements (4,957)
H04R 3 - Circuits for transducers (18,190)
H04R 31 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor (5,050)
H04R 5 - Stereophonic arrangements (11,598)
H04R 7 - Diaphragms for electromechanical transducers; Cones (6,555)
H04R 9 - Transducers of moving-coil, moving-strip, or moving-wire type (11,486)

Patents for H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems (314)
03/2005
03/17/2005	US20050058309 Loudspeaker with single or dual channel input selector and lockout
03/10/2005	WO2005022948A2 Tool-less frame fastening system having angled speaker assembly, snap-in and lock baffle, and post extension and angling system
03/10/2005	WO2005022947A2 Parametric tranducer having an emitter film
03/10/2005	CA2536390A1 Parametric tranducer having an emitter film
03/03/2005	WO2005020626A2 Ear warmer having a curved ear portion
03/03/2005	US20050047850 Audio device post extension and angling system
03/03/2005	CA2805540A1 Ear warmer having a curved ear portion
03/03/2005	CA2535445A1 Ear warmer having a curved ear portion
02/2005
02/17/2005	US20050034218 Ear warmer having a curved ear portion
02/10/2005	WO2005013639A2 Buffer management system, digital audio receiver, headphones, loudspeaker, method of buffer management
02/03/2005	WO2005011325A2 Passive acoustic radiating
01/2005
01/27/2005	WO2005009078A1 An audio stereo processing method, device and system
01/27/2005	US20050018868 Passive acoustic radiating
01/27/2005	CA2531290A1 An audio stereo processing method, device and system
01/05/2005	CN1182908C Method for making drying more effective
11/2004
11/11/2004	WO2004098230A2 Compositions for acoustic-damping coatings
10/2004
10/28/2004	US20040211934 Compositions for acoustic-damping coatings
10/15/2004	CA2434814A1 Battery charger having attached base
09/2004
09/23/2004	WO2004082321A2 Multi-channel digital feedback reducer system
09/22/2004	CN1531836A Supplemental audio contents system with wireless communication for cinema and related methods
09/16/2004	WO2004080113A2 Device having matched accoustical impedance and method
09/16/2004	US20040179387 Multi-channel digital feedback reducer system
09/09/2004	US20040174772 Acoustical source and transducer having, and method for, optimally matched acoustical impedance
09/02/2004	US20040170086 Membrane-less microphone and/or speaker capable of functioning in a very wide range of frequencies and with much less distortions
08/2004
08/18/2004	CN2634768Y Earphone and speaker switching circuit based no integrated circuit in portable information device
07/2004
07/14/2004	CN2626114Y Charger having additive bench
06/2004
06/09/2004	EP1240805B1 Method and arrangement for recording and playing back sounds
04/2004
04/22/2004	WO1990005910A3 Wholly microfabricated biosensors and process for the manufacture and use thereof
04/21/2004	EP1410679A2 Supplemental audio content system with wireless communication for a cinema and related methods
04/21/2004	EP1410516A2 Auricular connection device for the reduction of electric waves from cellular devices or alike
03/2004
03/24/2004	CN1143264C Scalable mixing for speech streaming
02/2004
02/03/2004	CA2273858C Power supply for microphone
09/2003
09/24/2003	CN2575916Y Digital distributing frame for communication
09/12/2003	WO2003003788A3 Supplemental audio content system with wireless communication for a cinema and related methods
08/2003
08/06/2003	CN1435074A Method and arrangement for recording and playing back sounds
07/2003
07/24/2003	US20030138106 Method and arrangement for recording and playing back sounds
05/2003
05/15/2003	WO2001099468A9 Auricular connection device for the reduction of electric waves from cellular devices or alike
01/2003
01/09/2003	WO2003003788A2 Supplemental audio content system with wireless communication for a cinema and related methods
01/09/2003	CA2452292A1 Supplemental audio content system with wireless communication for a cinema and related methods
01/02/2003	US20030002689 Supplemental audio content system with wireless communication for a cinema and related methods
10/2002
10/29/2002	US6473515 Cap and center pole apparatus and method of coupling
09/2002
09/26/2002	WO2001099468A3 Auricular connection device for the reduction of electric waves from cellular devices or alike
09/25/2002	CN1371588A Electric signal processing for electroacoustic transducer
09/18/2002	EP1240805A2 Method and arrangement for recording and playing back sounds
09/18/2002	CN1370386A Voice-to-remaining audio (VRA) interactive hearing aid & auxiliary equipment
07/2002
07/30/2002	US6427015 Power supply for microphone
05/2002
05/09/2002	US20020054978 Cloth with a stabilizing support structure
04/2002
04/24/2002	EP1198972A1 Electric signal processing for electroacoustic transducer
03/2002
03/27/2002	EP1190597A1 Voice-to-remaining audio (vra) interactive hearing aid & auxiliary equipment
03/05/2002	US6351895 Method for making drying more effective
02/2002
02/28/2002	WO2001047319A3 Method and arrangement for recording and playing back sounds
02/27/2002	EP0442969B1 Wholly microfabricated biosensors and process for the manufacture and use thereof
12/2001
12/27/2001	WO2001099468A2 Auricular connection device for the reduction of electric waves from cellular devices or alike
09/2001
09/12/2001	CN2447996Y Bone-conduction telephone
09/11/2001	US6289106 Cap and center pole apparatus and method of coupling
08/2001
08/30/2001	US20010017929 Cap and center pole apparatus and method of coupling
06/2001
06/28/2001	WO2001047319A2 Method and arrangement for recording and playing back sounds
05/2001
05/16/2001	EP0943225B1 Power supply for microphone
05/08/2001	US6230130 Scalable mixing for speech streaming
02/2001
02/01/2001	WO2001008446A1 Electric signal processing for electroacoustic transducer
01/2001
01/23/2001	CA2221178C Wholly microfabricated biosensors and process for the manufacture and use thereof
12/2000
12/28/2000	WO2000059262A3 Cap and center pole apparatus and method of coupling
12/21/2000	CA2374879A1 Voice-to-remaining audio (vra) interactive hearing aid & auxiliary equipment
11/2000
11/08/2000	CN1272938A Scalable mixing for speech streaming
10/2000
10/05/2000	WO2000059262A2 Cap and center pole apparatus and method of coupling
04/2000
04/26/2000	EP0995191A2 Scalable mixing for speech streaming
04/13/2000	WO1999060815A8 Scalable mixing for speech streaming
02/2000
02/17/2000	WO1999060815A3 Scalable mixing for speech streaming
12/1999
12/15/1999	EP0963774A2 Method for drying of filter cakes
12/15/1999	CN1238228A Method for making drying more effective
11/1999
11/25/1999	WO1999060815A2 Scalable mixing for speech streaming
09/1999
09/22/1999	EP0943225A1 Power supply for microphone
08/1999
08/31/1999	CA2002848C Wholly microfabricated biosensors and process for the manufacture and use thereof
01/1999
01/12/1999	CA2143227C Noise-canceling differential microphone assembly
11/1998
11/17/1998	US5837454 Process for the manufacture of wholly microfabricated biosensors
11/17/1998	US5837446 Process for the manufacture of wholly microfabricated biosensors
09/1998
09/03/1998	WO1998030062A3 Method for converting electric signals into sound waves and device for realising the same
07/1998
07/09/1998	WO1998030062A2 Method for converting electric signals into sound waves and device for realising the same
06/1998
06/24/1998	EP0580579B1 Noise control apparatus
06/18/1998	WO1998026631A1 Power supply for microphone
05/1998
05/06/1998	EP0627087B1 Hydrophone arrangement
10/1996
10/30/1996	EP0627087A4 Hydrophone arrangement.
09/1996
09/10/1996	US5554339 Process for the manufacture of wholly microfabricated biosensors
08/1996
08/28/1996	EP0556300B1 Contact transducer assembly for hearing devices
05/1996
05/28/1996	US5521885 Hydrophone arrangement
12/1995
12/20/1995	CN1113627A Noise-canceling differential microphone assembly
12/05/1995	US5473684 Noise-canceling differential microphone assembly
11/1995
11/14/1995	US5466575 Process for the manufacture of wholly microfabricated biosensors
10/1995
10/25/1995	EP0679044A2 Noise-canceling differential microphone assembly
12/1994
12/07/1994	EP0627087A1 Hydrophone arrangement
10/1994
10/04/1994	US5353263 Soft sonar suspension system
06/1994
06/15/1994	EP0580579A4 Improvements in and relating to transmission line loudspeakers
02/1994
02/02/1994	EP0580579A1 Improvements in and relating to transmission line loudspeakers
12/1993
12/22/1993	EP0556300A4 Contact transducer assembly for hearing devices
09/1993
09/02/1993	WO1993017356A1 Hydrophone arrangement
09/02/1993	CA2130430A1 Hydrophone arrangement
08/1993
08/25/1993	EP0556300A1 Contact transducer assembly for hearing devices.
05/1993
05/12/1993	EP0442969A4 Wholly microfabricated biosensors and process for the manufacture and use thereof
04/1993
04/06/1993	US5200051 Wholly microfabricated biosensors and process for the manufacture and use thereof
03/1993
03/16/1993	US5195142 Piezoelectric transducer

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