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Document Title |
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7613311 |
Digital implementation of a fourth order Linkwitz-Riley network with a low cutoff frequency
A simplified digital implementation of a fourth order Linkwitz-Riley crossover network is provided using approximations and transformations of the classical form. The approximation is particularly...
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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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7577263 |
System for audio signal processing
A sound reproduction system comprising a digital audio signal input ( 1 ), a digital audio signal processor ( 2 , DSP) and a digital audio signal output ( 3 ) wherein the digital signal processor (...
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7545946 |
Method and system for surround sound beam-forming using the overlapping portion of driver frequency ranges
A method and system for surround sound beam-forming using the overlapping portion of driver frequency ranges provides a low cost alternative to present external surround array systems. The...
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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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7460673 |
Point source speaker system
The system of the present invention includes, briefly, a point source speaker system, comprising a processor which produces a left minus right (L−R) audio signal, a right plus left (R+L) and a...
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7418104 |
Speaker system
A speaker system having a first speaker, a second speaker, and a housing having a first mounting surface to which the first speaker is mounted and a second mounting surface to which the second...
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7409067 |
Method and apparatus for adjusting frequency characteristic of signal
In a frequency characteristic adjustment apparatus incorporated in an audio system, a frequency characteristic of an audio signal is made to agree with a target frequency characteristic, thus...
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7409066 |
Method of adjusting filter parameters and an associated playback system
To improve upon a method of adjusting at least one filter parameter such as the mid-frequency of at least one filter unit provided with a playback system for audio signals, this filter unit being...
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7397924 |
Modular loudspeaker
The present invention relates to a modular loudspeaker, primarily intended to be used as a studio monitor and comprising a broadband module for radiating a first frequency range with a lower...
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7392880 |
Dual range horn with acoustic crossover
A new approach has been developed to combine mid-range and high frequency sound into the throat of a horn designed for sound reinforcement. An acoustic low pass filter element is interposed between...
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7321661 |
Current feedback system for improving crossover frequency response
A loudspeaker is provided for receiving an incoming electrical signal and transmitting an acoustical signal. The loudspeaker may include a power amplifier that has an input and an output, where the...
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7315624 |
Stream segregation for stereo signals
Separating a source in a stereo signal having a left channel and a right channel includes transforming the signal into a short-time transform domain; classifying portions of the signals having...
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7302067 |
Audio system for a computer
A computer audio system includes an audio codec and a tone controller. The audio codec is operably coupled to receive audio information, which includes tone control settings, PCM digital audio...
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7242783 |
Audio limiting circuit
An audio limiting circuit capable of satisfying frequency dependent limits and time domain constraints, is disclosed. In one illustrative embodiment, an input node receives an unattenuated input...
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7164770 |
Surround sound speaker system
The present invention uses multivoice coil drivers in conjunction with the small satellite speakers of multichannel surround sound systems to achieve an overall linear response between 100 Hz to...
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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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7116790 |
Loudspeaker
Conventional analog loudspeakers have a limited dynamic range as compared to the available dynamic range of digital recordings. Digital recordings use up to 24 bits and this implies a dynamic range...
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7088827 |
Reconfigurable speaker system
A reconfigurable speaker system for producing sound in response to at least one of right and left channel audio signals generated by an audio source. The speaker system can be configured by the...
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7085389 |
Infinite slope loudspeaker crossover filter
An improvement to inventor's prior art loudspeaker crossover filter invention is described. A substantially flat network input-impedance characteristic across the audible frequency range is...
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7027605 |
Mid-range loudspeaker
A midrange loudspeaker for operation in conjunction with low-frequency and high-frequency loudspeaker modules in a theater sound system, having a reduced depth for deployment in limited space. The...
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7003124 |
System and method for adjusting frequency response characteristics of high-pass crossovers supplying signal to speakers used with subwoofers
A system and method for adjusting the frequency response of a main speaker system used in conjunction with a subwoofer by modifying the input signal in response to user-adjustable settings to...
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6993141 |
System for distributing a signal between loudspeaker drivers
A system for distributing a source voltage from a signal source to a number of drivers or loudspeakers is disclosed. The system includes at least one autotransformer for connection to the signal...
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6983053 |
Method of selecting a frequency band of an output audio signal by a computer
A computing device allows selective output of audio signals within a frequency band. The computing device has a main system having an audio signal generator generating audio signals, a main audio...
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6950524 |
Optimal source distribution
A sound reproduction system has pairs of sound emitters that subtend different angles Θ, the span angle, at the listener position. The pairs of sound emitters are arranged to be excited by...
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6940987 |
Techniques for improving audio clarity and intelligibility at reduced bit rates over a digital network
In accordance with an embodiment of the present invention, a dynamics processor includes a non-linear automatic gain control (AGC) responsive to an input audio signal comprised of a plurality of...
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6931139 |
Computer audio system
A computer audio system includes an audio codec and a tone controller. The audio codec is operably coupled to receive audio information, which includes tone control settings, PCM digital audio...
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6854005 |
Crossover filter system and method
A filter system including a low pass filter having a response which rolls off towards a crossover frequency and a high pass filter having a complementary response which rolls off towards the...
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6834113 |
Loudspeaker system
A loudspeaker system, which has the ability to create a homogeneous sound over large distances, comprising at least one line-source of acoustical radiation, each comprising three or more...
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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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6775385 |
Loudspeaker frequency distribution and adjusting circuit
An audio frequency distribution and adjusting circuit includes a variable resistor network having a first variable resistance and a second variable resistance coupled in series between a first...
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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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6691073 |
Adaptive state space signal separation, discrimination and recovery
This invention unifies a set of statistical signal processing, neuromorphic systems, and microelectronic implementation techniques for blind separation and recovery of mixed signals. A set of...
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6687379 |
System and method for adjusting the low-frequency response of a crossover that supplies signal to subwoofers in response to main-speaker low-frequency characteristics
A system and method for adjusting a subwoofer sonic output in response to known main speaker characteristics in order to produce a desirable blending of sound from the combined subwoofer-main...
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6674866 |
Audio reproduction apparatus
An audio reproduction apparatus includes a primary audio amplifier having an output side for outputting audio signals, and a plurality of auxiliary audio amplifiers coupled electrically in series...
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6674864 |
Adaptive speaker compensation system for a multimedia computer system
An adaptive speaker compensation system and method, such as for use in a multimedia computer, stores speaker response filter coefficients for each speaker and adaptively compensates received audio...
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6633648 |
Loudspeaker array for enlarged sweet spot
The invention is a method of creating an enlarged listening sweet spot for multiloudspeaker audio reproduction. The method employs a plurality of audio drivers displaced generally in a horizontal...
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6606388 |
Method and system for enhancing audio signals
A technique for enhancing audio signals generated from compressed digital audio files is described. The technique uses a Bass Maximizer module, a Harmonic Exciter module and a Quasi Stereo module....
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6438237 |
3D woofer drive circuit
A 3D woofer drive circuit achieves miniaturization of a 3D sound system and reduces the cost thereof. The drive circuit includes two resistors arranged to synthesize an L-channel sound signal with...
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6381334 |
Series-configured crossover network for electro-acoustic loudspeakers
A crossover network for partitioning by frequency an electrical audio signal from an amplifier into a plurality of frequency bands, namely a high frequency band, and a low frequency band, and...
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6363157 |
Multiple element electroacoustic transducing
A loudspeaker system includes an enclosure supporting first and second loudspeaker driver assemblies and having an internal volume. At least the first loudspeaker driver assembly is constructed and...
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6359994 |
Portable computer expansion base with enhancement speaker
An expansion base with a rearward-emitting expansion speaker for emitting low frequency audio and providing surround sound capability. The frequency response of the expansion speaker includes...
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6310959 |
Tuned order crossover network for electro-acoustic loudspeakers
A crossover network for partitioning by frequency and electrical audio signal from an amplifier into a plurality of frequency bands for presentation to respective drivers or transducers. Such a...
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6281749 |
Sound enhancement system
The present invention provides an audio enhancement apparatus and method which spectrally shapes the differential information in a pair of audio signals so as to create an immersive,...
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6115475 |
Capacitor-less crossover network for electro-acoustic loudspeakers
A crossover network for partitioning by frequency an electrical audio signal from an amplifier into a plurality of frequency bands, namely a high frequency band, and a low frequency band, and...
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6081602 |
Arrayable two-way loudspeaker system and method
An arrayable loudspeaker system having a horn-loaded high frequency compression driver and a low frequency cone driver radiates acoustic energy from a focal point in a polar radiation pattern...
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5937072 |
Audio crossover circuit
An audio crossover circuit for use with audio speakers is disclosed. The audio crossover circuit includes a pair of inductors that are series connected and inductively coupled and a pair of...
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5930374 |
Phase coherent crossover
The present invention phase coherent crossover incorporates a method and apparatus for providing phase coherent crossover (PCC) signals. The PCC method and apparatus involve the utilizing of an...
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5917922 |
Method of operating a single loud speaker drive system
A method of operating a single speaker driver circuit having, a low frequency input coil connected between an audio circuit output and the input of the speaker, a low frequency return coil,...
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5887068 |
Multi-driver in-phase bipolar array loudspeaker
This loudspeaker system overcomes the disadvantages of prior art bipolar loudspeaker systems in which the front and rear-mounted driver(s) are connected with the same electrical phase. It...
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