Dynamic equalizer
First Claim
1. A method for equalization of sound in accordance with room and transducer characteristics from a source in a listening environment having multiple sound producing transducers, at least one sound detection transducer, and a listening position, comprising the steps of generating a chirp tone which includes multiple frequencies, and broadcasting the chirp tone into the listening environment from at least one transducer, and monitoring the broadcast chirp tone at the sound detection transducer and at the listening position,for producing a received chirp tone, comparing said received chirp tone to said chirp tone to determine amplitude and timing differences, programming an equalizer with said differences to equalize a signal passed through the equalizer in accordance with room and transducer characteristics, and directing the signal from said source through said programmed equalizer to said transducer.
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Accused Products
Abstract
A dynamic equalization system 12 for use in audio reproduction systems. The apparatus includes a chirp tone generator 38 which produces a tone having multiple frequencies. The chirp tone is broadcast into the listening space 10 from a transducer 14. The broadcast chirp tone is monitored by a second transducer 22 at the listening position to produce a received chirp tone. The received tone and the original tone are compared in a coefficient computer 44 connected to a programmable equalizer 42. The equalizer 42 uses the signal from the coefficient computer to compensate for irregularities 47 in listening space 10 and transducer 14 to produce a substantially undistorted listening experience from source 28 in listening space 10. The first step of the method of the invention is generation of a chirp tone. The chirp tone includes multiple frequencies. The chirp tone is broadcast into the listening space from a transducer placed at the selected transducer position. The broadcast chirp tone is next monitored by a transducer at the listening position to produce a received chirp tone. The received tone is then compared to the generated chirp tone and differences noted. The differences are used to program an equalizer for correction of sound. The process is done for each position where a transducer is located. Finally, sound from a program source is routed through the equalizer to the transducers for a corrected sound.
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Citations
21 Claims
- 1. A method for equalization of sound in accordance with room and transducer characteristics from a source in a listening environment having multiple sound producing transducers, at least one sound detection transducer, and a listening position, comprising the steps of generating a chirp tone which includes multiple frequencies, and broadcasting the chirp tone into the listening environment from at least one transducer, and monitoring the broadcast chirp tone at the sound detection transducer and at the listening position,for producing a received chirp tone, comparing said received chirp tone to said chirp tone to determine amplitude and timing differences, programming an equalizer with said differences to equalize a signal passed through the equalizer in accordance with room and transducer characteristics, and directing the signal from said source through said programmed equalizer to said transducer.
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4. A dynamic equalizer for use in audio systems in a listening environment and transducers comprising;
- a chirp tone generator for producing a tone including multiple frequencies, an output for propagating chirp tones generated by said chirp tone generator into the listening environment, and a coefficient computer having at least two inputs with one input connected to said chirp tone generator and one input connected to the listening environment for programming a programmable equalizer, and a programmable equalizer connected to said coefficient computer for equalizing audio signals in accordance with the listening environment and transducer.
- View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. An audio reproduction system connectable to a source of audio information for reproducing sound in a listening environment comprising a plurality of sound producing transducers for converting electrical energy into sound, and an amplifier connected to said transducers for increasing the strength of the signal from said source, and a dynamic equalizer connected between said source and said amplifier comprising;
- a chirp tone generator for producing a tone including multiple frequencies, an output for propagating chirp tones generated by said chirp tone generator into the listening environment, and a coefficient computer having at least two inputs with one input connected to said chirp tone generator and one input connected to the listening environment for programming a programmable equalizer, and a programmable equalizer connected to said coefficient computer for equalizing audio signals in accordance with the listening environment and transducer.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
Specification