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7352870 Active sound muffler and active sound muffling method  
An active sound muffler for reducing a sound to be reduced as emitted from a sound source located at one of the opposite sides of a sound insulating wall and diffracted and transmitted to the other...
7302066 Method for eliminating an unwanted signal from a mixture via time-frequency masking  
A method is presented for eliminating an unwanted signal (e.g., background music, interference, etc.) from a mixture of a desired signal and the unwanted signal via time-frequency masking. Given a...
7260163 Noise blanker using an adaptive all-pole predictor and method therefor  
A noise blanker ( 40, 106 ) monitors and removes noise from a sampled signal by adaptive filtering ( 98, 150 ) the sampled signal to generate trained adaptive filter prediction coefficients. The...
7231037 Active audio compressing in telecommunication  
An output reducing system for a telephone system, e.g., implemented in a headset, includes an input line and an output line, wherein the input line transmits an incoming signal to an output...
7194094 Sound masking system  
A sound masking system according to the invention is disclosed in which one or more sound masking loudspeaker assemblies are coupled to one or more electronic sound masking signal generators. The...
7181022 Audio watermarking to convey auxiliary information, and media embodying same  
Methods of processing audio to convey auxiliary information therein without audible evidence of data alteration. Various arrangements are disclosed. One receives plural bit auxiliary data in which...
7181021 Apparatus for acoustically improving an environment  
The invention provides an apparatus and related method for acoustically improving an environment. In an embodiment of the present invention, an electronic sound screening system includes a portion...
7106868 Active noise control for vehicle door noise  
An active noise control system ( 100 ) and method modifies a noise made when a vehicle closure, such as a door, hood, or trunk, closes by detecting the closure's velocity and selecting a delay time...
7088828 Methods and apparatus for providing privacy for a user of an audio electronic device  
The invention is directed to techniques for suppressing the voice of a user of an audio electronic device, such as a mobile phone, from being heard by an unintended listener. In one arrangement,...
7039478 Method and system for authoring a soundscape for a media application  
A method and system are provided for allowing a sound designer to design and implement interactive soundscapes based on existing waveform audio files, MIDI files, or audio streams. This is...
6950526 Sound masking and paging system  
The new speaker system includes masking capabilities, as well as optional paging capabilities and has a speaker mounted so as to be upwardly directed on a support plate or rack within a ceiling...
6823176 Audio artifact noise masking  
A system and method of masking an objectionable artifact in a mobile telephone. The process starts by referring to the design characteristics of the mobile phone to determine the expected level and...
6816599 Ear level device for synthesizing music  
The present invention relates to an ear level electronic device comprising a housing that is adapted to be worn behind the ear, in the ear, or in the ear canal, and to enclose a music synthesizer...
6798887 Key click masker and method for masking key clicks  
A key click masker and method for disguising key clicks protect sensitive information by randomly varying key click echo generated by a computer system. The key click masker and method disguise the...
6758304 Tuned Helmholtz resonator using cavity forcing  
A Helmholtz resonator includes a chamber at least partially defining a cavity. The chamber has a neck which defines a passage that is in fluid communication with the cavity. The chamber and the...
6690800 Method and apparatus for communication operator privacy  
Disclosed is a device for use with communications equipment to provide privacy for the operator and reduce acoustic noise from the operator's voice in the area. The device uses active acoustic...
6611196 System and method for providing audio augmentation of a physical environment  
A system and method are provided for implementing the transmission of information to users—via peripheral, or background, auditory cues—in response to the physical action of the users in a...
6608549 Virtual interface for configuring an audio augmentation system  
A virtual interface is provided which allows a user to navigate through a representation of a physical target area, such as an office, school or home environment. Using the virtual interface, a...
6594365 Acoustic system identification using acoustic masking  
A system for identifying a model of an acoustic system in the presence of an external noise signal is disclosed. The system includes an acoustic actuator for generating controlled sound within the...
6584138 Coding process for inserting an inaudible data signal into an audio signal, decoding process, coder and decoder  
In a coding method and a coder for introducing a non-audible data signal into an audio signal, the audio signal is first transformed to a spectral range and the masking threshold of the audio...
6577745 Watermark detection  
An input image is distorted so that it has less correlation to a watermark and the distorted image is subtracted from the input image to provide a preprocessed image. If the correlation between the...
6539095 Audio watermarking to convey auxiliary control information, and media embodying same  
Methods of processing audio to convey auxiliary control information therein without audible evidence of data alteration. Various arrangements are disclosed. One receives plural bit auxiliary data...
6466752 Method of improving sound quality and image formation apparatus  
A method of improving the quality of sounds produced from a device provided with a mechanical drive mechanism and the like is provided. In this method, by using either one of or both of units for...
6351222 Method and apparatus for receiving an input by an entertainment device  
A method and apparatus for processing acoustic and/or gesture input commands by an entertainment device begins by detecting an acoustic initiation command and/or a gesture initiation command. The...
6259792 Waveform playback device for active noise cancellation  
A noise environment is sampled via microphone. A processor generates a cancellation signal to offset the effects of the noise to a listener. The cancellation signal is converted into a sample...
6188771 Personal sound masking system  
A personal sound masking system for use in an individual workspace provides an optimized acoustic background environment by delivering a sound masking signal that is specifically matched to the...
6164408 Plenum mounted, flat panel masking loudspeaker system and method for mounting a masking loudspeaker in a ceiling plenum  
A plenum mounted, flat metal panel diaphragm masking loudspeaker includes a flat, stamped sheet metal frame which has a deployed state and an undeployed, flat state well suited to storage or...
6119805 Hearing protector adaptable to chair  
In order to reduce the risk of hearing damage to musicians, for example, there is suggested according to the invention a device which comprises, firstly, a floor stand portion with a foot and a...
6047074 Programmable hearing aid operable in a mode for tinnitus therapy  
A digital hearing aid is employable for tinnitus therapy, as well as for retraining tinnitus therapy, in combination with correction of other hearing impairments of a user of the hearing aid. For...
5960037 Encoding of a plurality of information signals  
The apparatus for encoding a plurality of digital information signals, having at least a first input unit for receiving a first digital information signal and a second input unit for receiving a...
5930557 Noise masking system and method in image forming apparatus  
A noise masking system in an image forming apparatus such as a laser beam printer or a copying machine having a drive mechanism acting as a noise generation source during operation, the noise...
5912821 Vibration/noise control system including adaptive digital filters for simulating dynamic characteristics of a vibration/noise source having a rotating member  
A control system for controlling vibrations and noises generated by a vibration/noise source having at least a rotating member includes a first filter which generates a control signal for...
5872853 Noise abatement device  
A device and method for minimizing noise particularly adjacent a source such as a highway. A plurality of transducers (10) are oriented in a specific alignment and driven in a sequence which sends...
5834647 Active device for attenuating the sound intensity  
A device for attenuating noises generated by moving sources includes a set of arranged electroacoustic sources which emit an opposite antinoise wave in response to an incident wave as sensed and...
5784300 Methods, apparatus and systems for real time identification and control modes of oscillation  
A system for real time identification of modes of oscillation includes a sensor, an observer, a controller and an actuator. The sensor senses a controlled system such as a combustor, and generates...
5781640 Adaptive noise transformation system  
A system for suppressing the effects of undesirable noise from an annoying noise source contains a plurality of transformation sounds which, when combined with the noise form a sound that is...
5774559 Method and apparatus for determining perceived roughness of powertrain sounds  
A powertrain roughness model is based on a structure comprising an auditory filterbank for spectral decomposition of the powertrain sound signals into a set of critical bandwidth channels, a model...
5754973 Methods and apparatus for replacing missing signal information with synthesized information and recording medium therefor  
A signal processing method is provided which detects a signal dropout portion in the input signal and which modifies the detected signal dropout portion with a signal derived from the portion in...
5687285 Noise reducing method, noise reducing apparatus and telephone set  
A noise reducing method and device for reducing the noise contained in an input speech signal collects the speech signal with a microphone 11 and converts the speech signal into a digital input...
RE35574 Communication device apparatus and method utilizing pseudonoise signal for acoustical echo cancellation  
A communication device, an apparatus, and a method for acoustic echo cancellation which makes use of a pseudonoise signal. An audio mixer adds the pseudonoise signal to an input signal received...
5625745 Noise imaging protection for multi-channel audio signals  
Techniques for encoding audio signals are disclosed wherein a left channel signal masking threshold and a right channel signal masking threshold may be advantageously adjusted. A given time block...
5559893 Method and device for active noise reduction in a local area  
A method for active noise reduction based on destructive interference of sound waves in order to reduce the energy in a sound field employs two omnidirectional microphones (M1, M2) provided in...
5455779 Noise reduction apparatus  
When noise is caused by the mechanical vibration propagated from the engine, the microprocessor calculates from the vibration frequency of the engine the secondary sound signal which is in...
5386689 Active gas turbine (jet) engine noise suppression  
A method and a system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines has several actuators to generate sound, several sensors to measure the...
5386472 Active noise control system  
A active noise control system having a digital signal processor programmed to function as adaptive digital filter with an output saturation control is described. The programmed adaptive filter has...
5360469 Apparatus for air filtration and sound masking  
An apparatus for enhancing the environmental quality of work and living spaces which combines a high efficiency particulate air filter and an optional gas element and electric blower and a...
5295192 Electronic noise attenuation method and apparatus for use in effecting such method  
A method for electrically attenuating a noise in an area for a sound wave to be propagatable in a three dimensional direction by making up a drive signal from the information on the noise and...
5293578 Noise reducing device  
A noise reducing device including a noise silencing device having a delay unit for delaying a phase of the noise wave, an amplifying unit for adjusting a gain of the delayed noise wave, a...
5245666 Personal subliminal messaging system  
A personal subliminal messaging system includes a wide range linear subliminal modulator (43), a digital audio recording or play device (46), a microphone (51) to pick up the sound at the ear, and...
5243661 Microphone apparatus  
A microphone apparatus having a microphone for producing a desired audio signal, includes an adaptive signal processing section which is supplied with a reference signal based on a vibration...
Matches 1 - 50 out of 90 1 2 >