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Document Title |
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7606377 |
Method and system for surround sound beam-forming using vertically displaced drivers
A method and system for surround sound beam-forming using vertically displaced drivers provides a low cost alternative to present external surround array systems. A pair of vertically displaced...
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7593533 |
Sound system and method of sound reproduction
A sound reproduction system comprises a left and right speakers located in close proximity, and a sound processor which provides audio signals to the pair of speakers. The sound processor...
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7587131 |
Audio clocking in video applications
A method of operating an electronic video device such as a DVD player, wherein video clock signals and audio clock signals are derived from a system clock signal using two phase-lock loops, and...
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7587056 |
Small array microphone apparatus and noise suppression methods thereof
The small array microphone apparatus comprises first and second omni-directional microphones, a microphone calibration unit and a directional microphone forming unit. The first and second...
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7577260 |
Method and apparatus to direct sound
The invention relates to sonic steerable antennae and their use to achieve a variety of effects. The invention comprises a method and apparatus for taking an input signal, replicating it a number...
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7561707 |
Hearing aid system
The user ( 2 ) of a binaural hearing aid or communication system ( 1 A, 1 B) is to be provided with an easier assignment or identification of acoustic signals generated in the system for keeping a...
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7542815 |
Extraction of left/center/right information from two-channel stereo sources
A digital audio signal processing system and method transforms two-channel stereo time-domain data into the frequency domain. Vector operations are performed upon the frequency-domain data by which...
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7529376 |
Directional speaker control system
In a directional speaker control system for realizing good sound localization by correcting the directivity of a directional speaker, adapted to an audio surround system in which a desired sound is...
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7477752 |
Loudspeaker system
A loudspeaker system with three loudspeakers (LF, LR, LB), includes a first and a second amplifier (BF, BR), each of which amplifies a channel of an audio signal. The outputs of the amplifiers...
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7472048 |
Direct digital drive audio system and method
A direct digital drive audio system and method system and method are presented. The direct digital drive system and method utilizes a digital signal to directly drive the speakers. In one exemplary...
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7454030 |
Subwoofer with cascaded linear array of drivers
A single folded, expanding horn loudspeaker reproduces low frequency audible sound at high power output levels. A compact enclosure houses a plurality of identical transducers, characterized by...
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7409068 |
Low-noise directional microphone system
A low-noise directional microphone system includes a front microphone, a rear microphone, a low-noise phase-shifting circuit and a summation circuit. The front microphone generates a front...
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7369666 |
Audio reproducing system
High and low frequency components C n1 , C n2 are generated by causing a center channel audio signal Cn to pass through a high-pass filter HPF and a low-pass filter LPF, and the high frequency...
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7366312 |
Artificial stereophonic circuit and artificial stereophonic device
An artificial stereophonic circuit which includes a monophonic signal input terminal, a signal output terminal of one of an L channel and an R channel which are connected to the signal input...
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7298854 |
Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing
Apparatus, methods and articles of manufacture are disclosed for modifying electromagnetic waves by reducing noise in those waves. A transfer function for a plurality of segments is derived through...
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7277551 |
Sound reproducing apparatus and sound reproducing method
A sound reproducing apparatus includes a low-frequency sound reproducing unit for reproducing and outputting a low-frequency sound having a frequency of a predetermined frequency or less; a...
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7254239 |
Sound system and method of sound reproduction
A sound reproduction system comprises a left and right speakers located in close proximity, and a sound processor which provides audio signals to the pair of speakers. The sound processor...
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7251333 |
Method and apparatus for creating a virtual third channel in a two-channel amplifier
A method and apparatus for creating a third signal channel from an input signal received in each of a first and second channel involves inverting a predetermined frequency range of signals in the...
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7242782 |
Audio signal processing circuit
An audio signal processing circuit for an audio reproduction apparatus at least having sound source located substantially at left and right sides to a listener, is provided. The audio signal...
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7177431 |
Dynamic decorrelator for audio signals
A system and method are described for rendering a left rear surround input signal at a left rear virtual speaker location and rendering a right rear surround input signal at a right rear virtual...
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7171005 |
P.A. system installation method
The invention concerns a method for transmitting in an area ( 100 ) information items in the form of sound waves representing a signal X(t), through a loudspeaker enclosure ( 2 ), said method...
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7139402 |
Sound reproduction device
A sound reproduction device of the present invention includes: a first loudspeaker; a second loudspeaker; a first loudspeaker drive section for driving the first and second loudspeakers, the first...
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7123724 |
Sound system
The invention is directed to a sound system with four loudspeakers and at least one signal processing device connected to the input of two loudspeakers and controlled by two input signals. The...
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7113604 |
Apparatus and method for matching the response of microphones in magnitude and phase
An apparatus is provided for matching the response of a pair of microphones. The two microphones provide a first and second output, respectively, in response to an audible input. The microphone...
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7092541 |
Surround sound loudspeaker system
A single loudspeaker has a substantially single-point source of sound energy derived from multiple drivers to provide a surround sound effect. The surround sound is effective for listeners close to...
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7088833 |
Multiple-speaker
The invention relates to a loudspeaker combination comprised of at least two loudspeakers, of which one is preceded by a low-pass frequency filter, the other by a phase shifter in the form of an...
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7043032 |
Tone-control circuit and method for conditioning respective frequency bands of an audio signal
An audio tone-control circuit includes 4 th -order low-pass, 4 th -order band-pass, and 4 th -order high-pass filter circuits. The 4 th -order low-pass filter circuit has a first phase response and...
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7039201 |
Audio signal phase detection system and method
A low cost, reliable and accurate audio frequency phase detection system and method includes an audio signal source generating an audio frequency test signal and a phase detector detecting phase...
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6968564 |
Multi-band spectral audio encoding
An encoder includes a sampler that samples an audio signal and that generates from the samples a plurality of short blocks of sampled audio. Each of the short blocks has a duration less than a...
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6876748 |
Digital signal processing for symmetrical stereophonic imaging in automobiles
A digital signal processing technique is provided for symmetrical stereophonic image enhancement in an automotive listening environment. The process introduces a rapid rate-of-change of phase shift...
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6850623 |
Parametric loudspeaker with improved phase characteristics
A parametric loudspeaker which uses multiple piezoelectric bimorph transducers. These multiple piezoelectric bimorphs have a resonant frequency which varies from unit to unit. The phase response at...
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6804361 |
Sound signal playback machine and method thereof
In a sound signal playback machine and method thereof, predetermined high frequency components are extracted from sound signals S L to S C of a main channel by high frequency pass filters 21 to...
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6788789 |
Phase conversion surround circuitry
A phase-conversion surround circuitry gives surround effects to right- and left-channel audio signals. An audio difference signal between the right- and left-channel audio signals is delayed at a...
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6772024 |
Method, apparatus and storage medium for adjusting the phase of sound from multiple speaker units
In a method for adjusting the phase of a sound signal from multiple speaker units connected to a computer (e.g. a PC), a microphone is installed at a user's listening position, a reference sound is...
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6771784 |
Sub woofer system
A sub woofer system is constituted of a real time digital signal processing part 5 that includes an A/D converter 5 a , a low pass filter block 5 b , a delay block 5 c , and a D/A converter...
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6683962 |
Method and system for driving speakers with a 90 degree phase shift
A method and system for providing enhanced coupling of a stereophonic pair of full-range loudspeakers or subwoofers to all room modes of a laterally symmetric listening room wherein the preferred...
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6675141 |
Apparatus for converting reproducing speed and method of converting reproducing speed
A method and apparatus for converting the reproducing speed of an acoustic signal where, of the acoustic signals held in a data recording section 1 , the input acoustic signal s 1 (sampled for...
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6654468 |
Apparatus and method for matching the response of microphones in magnitude and phase
An apparatus is provided for matching the response of a pair of microphones. The two microphones provide a first and second output, respectively, in response to an audible input. The microphone...
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6650758 |
Adaptive dual port loudspeaker implementation for reducing lateral transmission
This invention describes a loudspeaker implementation which can adaptively reduce the transmission of an acoustic signal to listeners other than the intended listener. The invention uses a dipole...
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6631193 |
Audio system enhancement using psycho acoustic matrix
A method of processing left and right audio signals is disclosed which reproduces the illusion of a center channel while achieving a perception by the listener of a wider speaker separation. This...
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6590983 |
Apparatus and method for synthesizing pseudo-stereophonic outputs from a monophonic input
A sound enhancement system (synthesizer) disclosed. The enhancement system synthesizes pseudo-stereophonic left and right output channels output from a monophonic input channel. The monophonic...
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6535610 |
Directional microphone utilizing spaced apart omni-directional microphones
A sound processing apparatus includes a plurality of microphones spaced apart from each other, each microphone producing electrical signals representative of sound signals incident thereon. The...
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6501717 |
Apparatus and method for processing digital audio signals of plural channels to derive combined signals with overflow prevented
Level detectors detect levels of digital audio signals of individual channels. A controller predicts whether or not an overflow will take place corresponding to detected signals. When the...
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6486750 |
Electrical signal phase compensator
An electrical signal phase compensator includes at least two conductors and a ground wire. In a two conductor system, the length of the first conductor is substantially longer than the second...
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6370253 |
Sound reproducing device
A signal produced by a speaker is removed from a totaled sound of noise around the speaker and the signal from the speaker, thereby extracting correctly the noise around. This structure allows an...
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6339368 |
Circuit for automatically driving mechanical device at its resonance frequency
A circuit for automatically driving a mechanical device at its resonance frequency is provided. To do so, the circuit detects non-resonance driving conditions of the mechanical device being coupled...
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6278785 |
Echo cancelling process with improved phase control
An echo is cancelled from a composite signal by providing a coarse phase adjustment, a fine phase adjustment, an amplitude correction, and then subtracting the phase shifted signal from the...
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6263083 |
Directional tone color loudspeaker
The present invention simulates complex radiation patterns or directivity patterns of musical instruments, resulting in a surprising realism. The invention employs a plurality of sound sources...
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6246772 |
Wireless headphone/speakers sound field control circuit
A wireless headphone/speakers sound field control system, which includes a wireless signal receiver, a left speaker connected to the wireless signal receiver through a left differential amplifier...
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6137378 |
Electrical signal phase compensator having three parallel conductors of differing lengths
An electrical signal phase compensator includes at least two conductors and a ground wire. In a two conductor system, the length of the first conductor is substantially longer than the second...
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