Matches 101 - 150 out of 430 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
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...
7024006 Complementary-pair equalizer  
A method and apparatus are described which reduce the presence of an unwanted signal. According to one embodiment, a first signal is provided from a desired location that includes an unwanted...
7024002 Method and apparatus for spatially enhancing the stereo image in sound reproduction and reinforcement systems  
Sound reproduction and reinforcement systems and methods are presented herein for spatially enhancing stereo images typically used such performances as those involving music. The embodiments seek...
7024007 Electric signal processing of electroacoustic transducer  
It is usual to utilize electric current filters for electroacoustic transducers, the filters are in general frequency mixers. Audio electric signals have a pulse response quality and excellent...
7024003 Wireless speaker system suitable for hard-wired audio system  
A wireless speaker system used in conjunction with a hard-wired audio system is provided. The wireless speaker system includes a wireless transmitter module including an input connected to a wired...
7016509 System and method for varying low audio frequencies inversely with audio signal level  
The present invention relates to an auto loudness circuit for performing loudness compensation automatically depending on the signal level. When the signal level decreases, loudness compensation is...
7013013 Surround device  
There is provided a surround device which processes stereo signals decoded by a decoder of a multi-channel surround method comprises boost means which boosts middle and low frequency components of...
7006641 Driving circuit, electro-mechanical-acoustic transducer, and portable terminal apparatus  
A circuit of the present invention is a driving circuit for driving a vibrator having a mechanical vibration system which resonates at a resonance frequency. The driving circuit outputs to the...
7003120 Method of modifying harmonic content of a complex waveform  
A method of manipulating a complex waveform by considering the harmonic and partial frequencies as moving targets over time in both amplitude and frequency and adjusting the moving targets by...
7003358 Audio signal processors  
An audio signal processor which modifies audio signal components outside the conventional audio frequency band. The processor includes a Delta Sigma Modulator (DSM) that receives a non-interpolated...
6999590 Stereo sound circuit device for providing three-dimensional surrounding effect  
A stereo sound circuit device for providing three-dimensional surrounding effect has a difference circuit for acquiring difference signal of a left channel sound and a right channel sound. The...
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...
6961435 Infra bass  
To improve the aural sensation from an input signal of an audio reproduction system a bandwidth extension device can be used. The bandwidth extension device includes a first and a second signal...
RE38822 Circuit, audio system and method for processing signals, and a harmonics generator  
A circuit, audio system and method are presented for processing an audio signal, in which a frequency band is selected, harmonics are generated from the selected signal by a harmonics generator,...
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...
6947567 Audio boost circuit  
An audio boost circuit having an input buffer responsive to a program input signal for providing a buffered program signal, An all pass phase inverter having an input coupled to receive the...
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...
6928172 Automatic sound field correcting system  
In correcting the sound field, loudspeakers 6 FL to 6 WF are sounded by the noise. The attenuation factors of the inter-band attenuators ATF 11 to ATF ki for adjusting gains of the band-pass...
6925426 Process for high fidelity sound recording and reproduction of musical sound  
A local performance simulation system simulates an ensemble sound pattern. The simulation system includes a signal generation system for simultaneously generating contact recording signals based on...
6909787 Method and related apparatus for stereo vocal cancellation  
Method and related apparatus for canceling vocal portions containing in two signals of two stereo channels and providing two corresponding output signals. The method includes: generating a mono...
6898470 Digital tone controls and systems using the same  
Digital tone controls 500 include a first path 502 including a digital filter 504 and a scaler 505 for controlling a level of a low frequency component of a received digital audio signal. A...
6885752 Hearing aid device incorporating signal processing techniques  
A hearing compensation system for the hearing impaired comprises a plurality of bandpass filters having an input connected to an input transducer and each bandpass filter having an output connected...
6882731 Multi-channel audio converter  
A method and audio converter for generating further audio signals (u, u l , u r , u c , u s ) from initial audio signal (x, x l , x r ), wherein optionally an information signal (in means 23 ) is...
6873708 Method and apparatus to simulate rotational sound  
Since the prior-art is based upon analog circuitry, it uses sinusoidal frequency and/or amplitude modulation to simulate a rotating speaker at a reasonable cost. This invention uses a process based...
6865274 Loudspeaker production system having frequency band selective audio power control  
A loudspeaker protection system includes a filter arrangement for defining one or more frequency bands of an audio signal, controllable amplifier/attenuator combinations coupled to the filter...
6845165 Acoustic effect apparatus and method and program recorded medium therefor  
A high pass filter 32 having a cut-off frequency of 200 Hz and a cut-off response of +12 dB/OCT and a low pass filter 33 having a cut-off frequency of 400 Hz and a cut-off response steeper than...
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...
6829360 Method and apparatus for expanding band of audio signal  
A low-pass filter of over-sampling type oversamples an input digital audio signal T 1 and filters and removes the low frequency components of the produced aliasing noise. A spectrum analyzer...
6804651 Method and device for determining a measure of quality of an audio signal  
Initially, voice signal components ( 4 ) are extracted from the audio signal ( 1 ) in a procedure for determining a measure of quality ( 2 ) of an audio signal ( 1 ). Based on this signal, a...
6792115 Apparatus for generating harmonics in an audio signal  
An apparatus for generating harmonics in an audio signal with an adder stage, which can add signals from a first signal line and a second signal line, such that an audio signal with harmonics can...
6792119 Audio system  
An audio system includes a circuit ( 12 ) for processing an audio signal, the circuit ( 12 ) having an input ( 20 ) for receiving the audio signal and an output ( 26 ) for supplying an output...
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...
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...
6760451 Compensating filters  
A prefilter ( 5 ) for an audio system comprising a loudspeaker ( 1 ) in a room ( 2 ), which corrects both amplitude and phase errors due to the loudspeaker ( 1 ) by a linear phase correction filter...
6754336 Telephone apparatus with hearing assistance  
A telephone apparatus is disclosed which comprises: a receiving portion for receiving a telephone signal and generating a voice signal from the received telephone signal; a frequency conversion...
6731759 Audio signal reproduction device  
An acoustic signal reproduction device includes a reproduction speaker and a signal processing section for generating an acoustic signal for causing a listener to recognize a reference speaker. The...
6731760 Adjusting a loudspeaker to its acoustic environment: the ABC system  
A method and corresponding apparatus for controlling the performance of a loudspeaker in a room includes the steps of, in a first acoustic environment, which may be regarded as a reference,...
6711265 Centralizing of a spatially expanded stereophonic audio image  
In a stereophonic system having sum and difference signals with expanded spatial imaging, localization of center audio materials more towards the center is accomplished by equalization of the (L+R)...
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...
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...
6678381 Ultra-directional speaker  
The ultra-directional speaker of the present invention comprises: an audio generator for generating an audio signal; an ultrasonic generator for generating an ultrasonic signal; a frequency...
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...
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...
6665408 Dynamic bass control circuit with variable cut-off frequency  
A circuit for providing a variable amount of bass control on an input signal dependent on a signal level of the input signal includes a high-pass filter, a variable impedance shunt connected to the...
6661900 Digital graphic equalizer control system and method  
A digital graphic equalizer uses a predetermined number of equalizing bands each having a different center frequency, and the center frequencies span a predetermined audio bandwidth. For each...
6655212 Sound field measuring apparatus and method  
A sound field measuring apparatus has: an exponential pulse generator 11 which outputs a pulse signal to speakers 4 a , 4 b , . . . ; a microphone 6 which is disposed in an acoustic space 5 ...
6631195 Speaker attenuation for practicing a musical instrument  
Speaker attenuation for practicing a musical instrument is a filter means connected between an amplifier and a speaker for providing greater treble attenuation than bass attenuation to compensate...
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...
6625287 Enhancing automatic noise reduction using negative output resistance  
An Automatic Noise Reduction system wherein the Q of the frequency response is reduced using a negative output resistance to substantially eliminate the coil resistance of a speaker in a headset....
6611602 Adaptive removal of resonance-induced noise  
Noise is removed from the digitized output of a sensor, subject to undesired resonance, even when the resonant frequency is unknown or drifts, with sufficiently low phase delay for the sensor to be...
Matches 101 - 150 out of 430 < 1 2 3 4 5 6 7 8 9 >