Matches 101 - 150 out of 266 < 1 2 3 4 5 6 >
Match Document Document Title
6252969 Howling detection and prevention circuit and a loudspeaker system employing the same  
A howling detection and prevention circuit which receives an output of a microphone as its input signal and detects howling therein includes a computing section which divides frequency of the input...
6195438 Method and apparatus for leveling and equalizing the audio output of an audio or audio-visual system  
A microcomputer for automatically controlling the sound in an audio or audio-visual system. Incoming audio signals from multiple channels are combined and fed to a pair of detector-rectifier...
6141425 Sound quality adjustment circuit  
A sound quality adjustment circuit including a status variable type active band-pass filter having an amplification circuit fed with an input signal and an integration circuit, and a controller for...
6118880 Method and system for dynamically maintaining audio balance in a stereo audio system  
A method and system for dynamically maintaining audio output balance in a stereo audio system are disclosed. The stereo audio system includes a small hand-held radio frequency remote control and a...
6115476 Active digital audio/video signal modification to correct for playback system deficiencies  
A method and apparatus for monitoring an output signal from and modifying an input signal to an audio/video system is disclosed. In one embodiment, the system response of said audio/video system is...
6111957 Apparatus and method for adjusting audio equipment in acoustic environments  
The signal in each channel of a stereo is modulated at an inaudible frequency by a replica of the original signal. The modulated signal is broadcast into a room by a loudspeaker and is picked up by...
6087736 Communication system for vehicle  
A communication system for a vehicle, provided with a balanced cable connecting respective nodes and a comparator for obtaining a receive signal by differentially amplifying a signal from the...
6072879 Sound field control unit and sound field control device  
A sound field control unit includes a microphone collecting sound about a self-unit, a collected sound signal input-output terminal for outputting a collected sound signal of the self-unit to...
6011853 Equalization of speech signal in mobile phone  
The invention relates to equalization in a digital phone, advantageously a mobile phone. According to the invention, the equalization (4) of a reproduced sound is changed according to the operating...
5987065 Adaptive equalizer  
An equalizer comprising a pair of high pass filters for receiving an input signal, each filter having gain, a first of the filters having gain which is substantially flat within its passband, a...
5987145 Digital audio equalizer  
A digital multi-bandpass audio equalizer which is comprised of an analog multiplexer (10), a two-channel analog-to-digital converter (12), a digital-to-analog converter (22), and a digital signal...
5983087 Distributed digital signal processing for vehicle audio systems  
A radio with a tuner and other program sources uses a digital signal processor (DSP) to enhance the audio signal and to generate a stream of digital data including audio data and control data...
5974156 Circuit arrangement for influencing the frequency response of a digital audio signal  
A digital circuit arrangement for influencing the frequency response of a digital audio signal as a function of frequency and/or amplitude, in which the input signal of the digital circuit...
5953431 Acoustic replay device  
To avoid degradation of the acoustic signal radiated from the opening of the ducted horn of a ducted horn type speaker, under influence of the ducted horn, below the characteristic of the speaker...
5946402 Signal processing device for processing sound quality, and recording apparatus, reproducing apparatus and mixing apparatus provided with the signal processing device applied thereto  
In controlling a sound quality of a one-bit digital signal, a signal processing device takes the operating steps of separating the digital signal into two bands, an audible band and a higher band...
5910990 Apparatus and method for automatic equalization of personal multi-channel audio system  
An apparatus for automatically equalizing a personal multi-channel audio system, and a method therefor, are disclosed. White noises which are generated by a transfer characteristic measuring...
5892830 Stereo enhancement system  
A stereo enhancement system processes the difference signal component generated from a pair of left and right input signals to create a broadened stereo image reproduced through a pair of speakers...
5892833 Gain and equalization system and method  
A multi-band digital gain and equalizer system for receiving and processing an audio signal includes an analog-to-digital converter for converting the audio signal to a digital signal X, a...
5881103 Electronic device with equalized audio accessory and method for same  
An electronic device (110) provides equalization and/or compensation for a coupled audio accessory device (120). The audio accessory device (120) has a memory (220) that contains equalizer...
5832438 Apparatus and method for audio computing  
A computer for handling audio signals includes, within one box, programmable digital processing circuitry, read/write memory, digital-to-analog circuitry, one or more speakers, and an equalization...
5805715 Method and apparatus for compensating multi-resolution linear distortion  
A distortion compensation apparatus heightens resolution of a low frequency domain among the audible frequency band, and relatively lowers the resolution in the higher frequency domain. By...
5802164 Systems and methods for controlling telephone sound enhancement on a per call basis  
In a communications system containing signal enhancement circuitry capable of selectively enhancing portions of a plurality of signals carried on a corresponding plurality of channels through the...
5790671 Method for automatically adjusting audio response for improved intelligibility  
Intelligibility of received speech in a radio receiver is improved by automatically adjusting audio response in accordance with ambient noise levels. When high ambient noise is present, the...
5768398 Signal amplification system with automatic equalizer  
A signal amplification system wherein a signal coming from a microphone is applied to a loudspeaker via a signal processing system. The signal processing system includes an estimator for estimating...
5761313 Circuit for improving the stereo image separation of a stereo signal  
By using special frequency response manipulation in the difference channel of a stereo signal, the stereo image will appear to extend beyond the actual placement of the loudspeakers. This is...
5745583 Audio playback system  
An audio playback system wherein upon selection of a music genre there is made an automatic setting to an optimum frequency characteristic and at the same time a constant sound volume...
5745586 Sound quality control system  
A sound quality control system according to the present invention precisely and swiftly realizes a sound quality that is desired by a listener, by controlling sound quality based on quantitative...
5745585 Dynamic equalization method and device  
Equalization method for the amplification of audiofrequency signals that uses a first component for the correction of the response curve for the stationary mode, at least a second component for...
5740260 Midi to analog sound processor interface  
An apparatus for automatically recalling audio parameter setup is disclosed. A processor is coupled between a MIDI interface and one or more analog level controlled audio processor channels. The...
5737428 Circuit for providing visual indication of feedback  
A compound differential circuit detects the highest relative signal of a plurality of input signals. Peak detector circuits including a sensing diode and a capacitor, are employed to produce a...
5734730 Apparatus for adjusting a frequency characteristic of an audio signal according to biorhythm principles  
An apparatus adjusts the frequency characteristic of an audio signal output corresponding to changes in an individual's biorhythms. The apparatus is composed of a key input unit for receiving...
5727074 Method and apparatus for digital filtering of audio signals  
The present invention provides an efficient audio equalization system in terms of the number of coefficients and taps of a digital filter. The processing efficiency of the system allows it to...
5692051 Electronic equalization for recessed loudspeaker mounting  
An equalizing circuit, for compensating frequency response perturbations in a loudspeaker caused by a recessed mounting of the loudspeaker, includes an input for receiving an audio signal, a...
5680468 Methods of and systems for speaker equalization in automotive vehicles having convertible tops  
Automobiles having convertible tops and audio systems are provided with a first audio equalization mode for closed car conditions and a second audio equalization mode for open car conditions. The...
5680450 Apparatus and method for canceling acoustic echoes including non-linear distortions in loudspeaker telephones  
An echo canceling loudspeaker telephone includes a loudspeaker which produces a sound pressure wave in response to an input signal which is applied to an audio input thereof. This sound pressure...
5648988 Communication system including a digital roll-off filter  
A transversal type digital roll-off filter receiving a signal n-time sampled from analog signal carrying a pulse train of symbol rate T, includes a transversal type delay line including a plurality...
5633938 Audio track mixing processor  
An audio track mixing processor comprising phonic conversion circuitry for receiving a primary audio track of an input audio mix in stereo and transmitting a detector activation signal in mono; a...
5629985 Apparatus and methods for auditory conditioning  
In one mode of operation, a signal representation of sound is provided to an audio filter that has transmission characteristics that are controlled by a microprocessor. The output of the audio...
5617478 Sound reproduction system and a sound reproduction method  
A sound reproduction system for automatically conducting a tone control for an audio signal according to the present invention includes: an input terminal for inputting an audio signal; a judgment...
5596650 Equalizing circuit for a loudspeaker system  
The invention provides an equalizing circuit for a loudspeaker system. The circuit includes an output amplifier connected to the circuit output, and a feedback amplifier connected to the circuit...
5581626 Automatically switched equalization circuit  
A circuit in which, when loudspeakers are being used by themselves, the equalization to the loudspeakers is optimized for full range operation and only the intended filters for full range operation...
5581621 Automatic adjustment system and automatic adjustment method for audio devices  
A system for automatically adjusting an audio system with a programmable parametric equalizer includes an audio analysis unit that can be connected to the audio unit. The parametric equalizer...
5574792 Volume and tone control circuit for acoustic reproduction sets  
The invention is a volume and tone control circuit for audio sets which will not distort a signal when the volume is adjusted to maximum regardless of the tone. The circuit has a volume control in...
5572443 Acoustic characteristic correction device  
An acoustic characteristic correction device includes a section for setting a desired characteristic of a response characteristic in a reproduction system including a sound field, a section for...
5566237 Time zone equalizer  
An audio selection circuit (10) having time selectable equalization, comprising a plurality of inputs (24, 26) for coupling the audio selection circuit to a plurality of audio signal sources, a...
5550923 Directional ear device with adaptive bandwidth and gain control  
An ear device protects a user from damaging sound levels while permitting the user to hear and understand conversation in a noisy environment. The device includes an enclosure system for at least...
5541866 Device for correcting frequency characteristic of sound field  
A transmission frequency characteristic compensating apparatus capable of obtaining a combination of parameter values allowing a synthetic characteristic not to exceed a predetermined level. The...
5537614 Signal level display unit  
A signal level display unit which makes adjustment for correcting of deviation unnecessary and enables cost reduction. An input analog audio signal 26 is divided into seven signals having different...
5537668 Audio signal reproducing device  
In a reproducing device, e.g., in the portable tape player, the sound leakage from earphones is effectively avoided by directly detecting the signal level of medium to high frequency sounds at the...
5533120 Acoustic feedback cancellation for equalized amplifying systems  
A speaker amplification system incorporates an adaptable notch filter that can dynamically adapt to the frequency of feedback oscillations caused by acoustic feedback frequency in order to remove...
Matches 101 - 150 out of 266 < 1 2 3 4 5 6 >