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7317800 |
Apparatus and method for processing an audio signal to compensate for the frequency response of loudspeakers
A circuit for processing an input audio signal received at an input of the circuit provides a processed audio signal at a circuit output. The circuit includes first and second conductive paths...
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7289637 |
Method for automatically adjusting the filter parameters of a digital equalizer and reproduction device for audio signals for implementing such a method
A method is proposed for automatically adjusting the filter parameters—center frequency, quality and amplification or attenuation—of at least one digital equalizer which is a component of a...
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7286674 |
Method for designing a modal equalizer for a low frequency audible range especially for closely positioned modes
The present invention relates to a method for designing a modal equalizer ( 5 ) for a low frequency audible range, typically for frequencies below 200 Hz for a predetermined space ( 1 ) (listening...
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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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7277550 |
Enhancing audio signals by nonlinear spectral operations
A system and method are disclosed for enhancing audio signals by nonlinear spectral operations. Successive portions of the audio signal are processed using a subband filter bank. A nonlinear...
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7274795 |
System for and method of audio signal processing for presentation in a high-noise environment
The present invention relates to novel systems, methods, and circuits useful for achieving quality sound presentation in high-noise environments. Specifically, the present invention provides...
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7274793 |
Excursion limiter
An excursion limiter ( 10 ) broadly comprises a voltage controlled filter ( 40 ) to suppress an audio signal according to a selected threshold at a selected frequency using a control voltage. The...
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7266205 |
Linearized filter band equipment and processes
A method for use with equipment having filters, the method characterized by multiplying a matrix having a specified cut-boost setting of a filter of a graphic equalizer by a correction matrix to...
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7263407 |
Method and apparatus for processing digital audio signal
A digital audio signal has a sequence of samples. Extreme values in an audio waveform represented by the digital audio signal are detected. The extreme values include a maximum value and a minimum...
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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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7248702 |
Sound enhancement system
A system for enhancing sound quality comprising a filter that square roots the instantaneous amplitude of frequencies in an input signal for generating artificial harmonics corresponding to said...
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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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7236839 |
Audio decoder with expanded band information
An audio processing unit that provides a high-sound-quality reproduction even when a band property of an input encoded signal drops at or below a Nyquist frequency. The audio processing unit has a...
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7227961 |
Auditory sense training method and sound processing method for auditory sense training
An auditory sense training device 1 to be used in an auditory sense training method for training auditory sense by listening to a sound formed by processing an original sound comprises a band...
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7215787 |
Digital audio precompensation
The invention concerns digital audio precompensation, and particularly the design of digital precompensation filters. The invention proposes an audio precompensation filter design scheme that uses...
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7206419 |
Guitar preamlifier system with controllable distortion
A musical instrument preamplifier system is provided which comprises a filtering means for splitting an input signal into two or more separate frequency bands comprising a similar phase response...
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7205910 |
Signal encoding apparatus and signal encoding method, and signal decoding apparatus and signal decoding method
A signal encoding apparatus ( 10 ) limits an inputted time series signal to a low frequency band signal having a certain cut-off frequency or less to include the low frequency band signal into code...
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7197149 |
Cellular phone
A cellular phone is provided with a melody sound reproducing unit comprising: a speaker for providing specified output in a range between a first frequency and a second frequency; a signal...
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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...
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7171009 |
Method of correcting sound field in an audio system
In correcting the sound field, the 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...
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7171010 |
Dynamic bass boost apparatus and method
Audio processing methods and apparatus are provided for at least partially compensating for the Fletcher-Munson effect. An audio processor includes a variable filter receiving an input signal and...
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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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7162046 |
Microphone-tailored equalizing system
A method and system is described to improve the reproduction of sound of an acoustic musical instrument. According to one embodiment, a first microphone is placed at a proximate location to the...
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7145944 |
Equalizer containing a plurality of interference correcting equalizer sections
An equalizer includes at least two first mutually interfering equalizer sections, and at least two second interference-correcting equalizer sections, arranged in series. Each of the second...
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7146015 |
Frequency threshold audio activity detector
This invention is a circuit that actuates a loudspeaker at input frequencies above a predetermined threshold and mutes the loudspeaker at input frequencies below the threshold. The circuit includes...
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7143649 |
Sound characteristic measuring device, automatic sound field correcting device, sound characteristic measuring method and automatic sound field correcting method
In order to measure a sound characteristic in a sound space, measurement sound is outputted to the sound space. Measurement sound data of a predetermined time period, which is prepared in advance,...
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7146010 |
Two methods and two devices for processing an input audio stereo signal, and an audio stereo signal reproduction system
The present invention relates to methods and devices for processing one or the other of two types of common input audio stereo signals so that the output signals will reproduce normally wide stereo...
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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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7136493 |
Sub-harmonic generator and stereo expansion processor
A sub-harmonic generator includes: an input filter operable to receive an input signal containing frequencies from among a first range and to produce a first intermediate signal containing...
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7123728 |
Speaker equalization tool
A computer readable medium containing program instructions for controlling a parametric equalizer is provided. Generally, a computer readable code is provided for displaying a composite...
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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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7116787 |
Perceptual synthesis of auditory scenes
An auditory scene is synthesized by applying two or more different sets of one or more spatial parameters (e.g., an inter-ear level difference (ILD), inter-ear time difference (ITD), and/or...
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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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7113606 |
Adjustable harmonic distortion detector and method for using the same
There is provided an adjustable harmonic distortion detector that includes a clock signal source, means for the detection of a first period of evaluation, and means for the detection of a second...
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7113607 |
Low frequency feedback controlled audio system
The present invention provides a feedback-controlled audio system. A single internal pressure-sensitive detector is used as the sensor. The primary radiator is mounted facing inward to minimize...
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7110556 |
Multichannel audio signal processing device
An audio signal processing device includes a signal supply for supplying coded audio signal over more than one input channel and, per input channel, over separate frequency sub-bands domain...
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7096081 |
Method of implementing a variable number of filter sections for digital signal processing
A DSP-based equalization system which uses a jump and lookup table stored in volatile memory to execute a variable number of equalization structures stored in nonvolatile memory for the...
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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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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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7079659 |
Sound generating apparatus and method, sound generating space and sound, each provided for significantly increasing cerebral blood flows of persons
In a sound generating apparatus, a sound generating space, a sound, and a method for generating a sound, a sound is generated which has a frequency within a first frequency range beyond a...
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7079660 |
Bass compensation device and a sound system using the device
The bass compensation device of the present invention includes a high frequency removing circuit for removing a high frequency component of an input sound signal; an absolute value circuit for...
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7068799 |
Sound field correcting method in audio system
In correcting the sound field, the 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...
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7058187 |
Automatic sound field correcting system and a sound field correcting method
A filter coefficient of a graphic equalizer GEQ is corrected based on detection results of reproduced sounds generated by supplying a noise to all frequency band loudspeakers 6 FL to 6 RR and a...
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7058183 |
Sound correction system, recording medium on which a sound correction program is recorded, sound correction method and sound correction apparatus
The object of this invention is to obtain the optimum music level by separately and independently performing the sound correction for the high-frequency range and low-frequency range according to...
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7054455 |
Audio system
An audio system includes a circuit ( 12 ) for processing an audio signal, which circuit ( 12 ) having an input ( 20 ) for receiving the audio signal and an output ( 26 ) for supplying an output...
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7050591 |
Acoustic output processing apparatus
Acoustic outputs from an audio system and various acoustic output devices are produced from a speaker, and a sound which a user desires to hear clearly is automatically selected and corrected with...
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7046813 |
Auditory sense training method and sound processing method for auditory sense training
An auditory sense training device 1 to be used in an auditory sense training method for training auditory sense by listening to a sound formed by processing an original sound comprises a band...
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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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7043031 |
Acoustic correction apparatus
An acoustic correction apparatus processes a pair of left and right input signals to compensate for spatial distortion as a function of frequency when the input signals are reproduced through...
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7039194 |
Audio effects synthesizer with or without analyzer
The method is provided for simulating an audio effect processor. At least two impulse responses are stored representing the audio processor for input signals having different characteristics. The...
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