Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 3 - Circuits for transducers
Patents for H04R 3 - Circuits for transducers (18,190)
03/2005
03/24/2005WO2005027570A1 High efficiency audio transducer
03/24/2005WO2005027569A1 High efficiency audio reproduction
03/24/2005WO2005027568A1 Audio frequency range adaptation
03/24/2005WO2005027514A1 Digital loudspeaker
03/24/2005WO2005011108A3 Low-power high-psrr current-mode microphone pre-amplifier system and method
03/24/2005WO2005009072A3 Microphone comprising integral multi-level quantizer and single-bit conversion means
03/24/2005WO2004095878A3 Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation
03/24/2005US20050063558 Method for noise reduction and microphonearray for performing noise reduction
03/24/2005US20050063555 Electroacoustical transducing
03/24/2005US20050063553 Microphone apparatus, noise reduction method and recording apparatus
03/24/2005US20050061770 MEMS digital-to-acoustic transducer with error cancellation
03/24/2005DE10340228A1 Audio system with bi-directional signal transfer between audio transmitters and receivers to permit checking of signal quality and changing of selected channel
03/23/2005EP1517581A2 A method for optimal microphone array design under uniform acoustic coupling constraints
03/23/2005EP1517580A2 Electroacoustical transducing
03/23/2005EP1516514A1 Method of digital equalisation of a sound from loudspeakers in rooms and use of the method
03/23/2005CN2688006Y Mixing console
03/23/2005CN1599510A Electroacoustical transducing
03/23/2005CN1598955A Sound system
03/23/2005CN1598890A Vehicular audio apparatus, and tone generating method and program therefor
03/22/2005US6870938 Semiconductor electret capacitor microphone
03/17/2005WO2005024789A1 Acoustic processing system, acoustic processing device, acoustic processing method, acoustic processing program, and storage medium
03/17/2005US20050058311 Stereo headphone
03/17/2005US20050058309 Loudspeaker with single or dual channel input selector and lockout
03/17/2005US20050058305 Vehicular audio apparatus, and tone generating method and program therefor
03/17/2005US20050058300 Communication apparatus
03/17/2005US20050058278 Method and System for Suppressing Echoes and Noises in Environments Under Variable Acoustic and Highly Fedback Conditions
03/17/2005DE10330009A1 Loudspeaker-amplifier combination with adaptive tone control, varies amplifier power in terms of impedance/frequency characteristic curve
03/16/2005EP0976200A4 Vehicular loudspeaker system
03/16/2005CN2686262Y External sound pickup equipment for vehicle
03/16/2005CN1596432A Systems and methods for controlling a phased array focused ultrasound system
03/16/2005CN1596031A Audio player having wireless earphone communicating with handset
03/16/2005CN1596030A Digital audio precompensation
03/16/2005CN1193644C System and method for dual microphone signal noise reduction using spectral subtraction
03/15/2005US6868158 Echo processing apparatus
03/15/2005US6868045 Voice control system with a microphone array
03/15/2005CA2296414C Method for electronically selecting the dependency of an output signal from the spatial angle of acoustic signal impingement and hearing aid apparatus
03/10/2005WO2005022951A2 Audio input system
03/10/2005WO2005022950A1 Speaker device
03/10/2005WO2005022947A2 Parametric tranducer having an emitter film
03/10/2005WO2004082324A3 Transducer asembly with modifiable buffer circuit and method for adjusting thereof
03/10/2005US20050055388 Blind signal separation system and method, blind signal separation program and recording medium thereof
03/10/2005US20050055117 Digital mixer
03/10/2005US20050053247 Audio speaker crossover having two or more filter housings
03/10/2005US20050053246 Automatic sound field correction apparatus and computer program therefor
03/10/2005US20050053245 5.1 Channel signal output mixer circuit for earphone
03/10/2005CA2536390A1 Parametric tranducer having an emitter film
03/09/2005EP1513372A2 A Method of Manufacturing a Loudspeaker Distortion Compensator
03/09/2005EP1269576B1 Method for providing the transmission characteristics of a microphone arrangement and microphone arrangement
03/09/2005CN2684505Y 数字混音器 Digital Mixer
03/09/2005CN2684321Y Acoustic signal processing apparatus
03/09/2005CN1593072A Method and apparatus for determining a nonlinear response function for a loudspeaker
03/09/2005CN1592598A A method and apparatus for performing real-time storage of ultrasound video image information
03/09/2005CN1592491A Method and apparatus for compensating for nonlinear distortion of speaker system
03/09/2005CN1592303A Methods and systems for application instance level workload distribution affinities
03/09/2005CN1592143A Reproduction system
03/09/2005CN1592106A Adapting device capable of converting picture element clock pulse into character clock pulse
03/09/2005CN1591572A Voice matching system for audio transducers
03/08/2005US6865274 Loudspeaker production system having frequency band selective audio power control
03/08/2005CA2460260A1 Blind signal separation system and method, blind signal separation program and recording medium thereof
03/03/2005WO2005020633A1 Method for processing audio-signals
03/03/2005US20050050202 Methods, systems and computer program products for application instance level workload distribution affinities
03/03/2005US20050047611 Audio input system
03/03/2005US20050047610 Voice matching system for audio transducers
03/03/2005US20050047609 Device and method for carrying out multichannel acoustic echo cancellation with a variable number of channels
03/03/2005US20050047606 Method and apparatus for compensating for nonlinear distortion of speaker system
03/03/2005US20050046752 Reproduction system
03/03/2005US20050046600 Robust system for transmitting and receiving map data
03/03/2005US20050045453 Signal adjusting apparatus
03/03/2005DE10325446B3 Verfahren zum Detektieren eines Fehlers bei einem Piezoaktor und Ansteuerschaltung für einen Piezoaktor, sowie Piezoaktorsystem A method for detecting a fault in a drive circuit for a piezoelectric actuator and piezoelectric actuator, and Piezoaktorsystem
03/03/2005DE10156816B4 Mehrfachfunktions-Signalgeber Multi-function signal generator
03/02/2005EP1511358A2 Automatic sound field correction apparatus and computer program therefor
03/02/2005EP1511350A2 Voice matching system for audio transducers
03/02/2005EP1509337A1 Electronic control circuit and acoustic-signal emitting device for vehicles
03/02/2005CN2682490Y Horn with mobile play function
03/02/2005CN1589556A Digital implementation of multi-channel demodulators
03/02/2005CN1589465A Audio-based method and apparatus for controlling operation of an electric appliance
03/02/2005CN1589066A Method and relative device for producing echo effect
03/02/2005CN1589065A System capable of eliminating heat effect of speaker
03/01/2005US6862636 Multi-mode speaker operating from either digital or analog sources
03/01/2005US6862356 Audio device
03/01/2005US6861964 Robust system for transmitting and receiving map data
02/2005
02/24/2005WO2005018277A1 Device and method for operating voice-assisted systems in motor vehicles
02/24/2005WO2005017877A2 Device and method for the generation, storage or processing of an audio representation of an audio scene
02/24/2005US20050041822 Signal adjusting apparatus
02/24/2005US20050041530 Signal processing device for acoustic transducer array
02/24/2005DE19854373B4 Verfahren zur Steuerung der Empfindlichkeit eines Mikrofons Method for controlling the sensitivity of a microphone
02/23/2005EP1509065A1 Method for processing audio-signals
02/23/2005EP1508785A1 Signal adjusting apparatus
02/23/2005EP1508784A1 Signal adjusting apparatus
02/23/2005CN2681501Y A handset with reverberation function
02/23/2005CN1585564A Method for setting loudspeaker array by second residual sequence and apparatus thereof
02/23/2005CN1190995C Signal excitation type electric loudspealcer system
02/23/2005CN1190775C Multi-device audio-video system with common echo canceling means
02/22/2005US6859538 Plug and play compatible speakers
02/22/2005US6859096 Class D amplifier
02/22/2005US6857312 Systems and methods for sensing an acoustic signal using microelectromechanical systems technology
02/17/2005WO2005015956A1 Voice reproducing method and reproducer using line array speaker unit
02/17/2005WO2005015946A1 Speaker system for video receiver and method for installing speaker
02/17/2005WO2005015246A1 Capacitance determining circuit and capacitance determining method
02/17/2005US20050036645 High back EMF, high pressure subwoofer having small volume cabinet, low frequency cutoff and pressure resistant surround
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