SOUND TUNING METHOD
First Claim
1. A method for automated tuning of a sound system, the sound system comprising delay lines, equalizing filters, and at least two loudspeakers, the method comprising the steps of:
- reproducing a useful sound signal through the loudspeakers;
measuring sound pressure values at least one location;
providing a target transfer function for tuning the delay lines and the equalizing filters of the sound system, the target transfer function representing a desired transfer characteristics of the sound system;
adjusting the delay of the delay lines; and
adjusting amplitude responses of the equalizing filters such, that the actual transfer characteristics of the sound system approximates the target function.
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Accused Products
Abstract
The invention relates to a method for automated tuning of a sound system, the sound system comprising delay lines, equalizing filters, and at least two loudspeakers, the method comprising the steps of reproducing a useful sound signal through the loudspeakers, measuring sound pressure values at least one location, providing a target transfer function for tuning the delay lines and the equalizing filters of the sound system, the target transfer function representing a desired transfer characteristics of the sound system, adjusting the delay of the delay lines, and adjusting amplitude responses of the equalizing filters such, that the actual transfer characteristics of the sound system approximates the target function.
51 Citations
32 Claims
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1. A method for automated tuning of a sound system, the sound system comprising delay lines, equalizing filters, and at least two loudspeakers, the method comprising the steps of:
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reproducing a useful sound signal through the loudspeakers; measuring sound pressure values at least one location; providing a target transfer function for tuning the delay lines and the equalizing filters of the sound system, the target transfer function representing a desired transfer characteristics of the sound system; adjusting the delay of the delay lines; and adjusting amplitude responses of the equalizing filters such, that the actual transfer characteristics of the sound system approximates the target function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for automated tuning of a sound system, the sound system comprising:
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a signal source for providing a useful sound signal; a plurality of cross-over filters that each receive the useful signal and provide an associated cross-over filter output signal; a plurality of adaptive filters, each uniquely associated with one of the plurality of cross-over filters to receive the associated one of the cross-over filter output signals, where each of the plurality of adaptive filters provides an associated one of a plurality of adaptively filtered signals; a plurality of loudspeakers, each uniquely associated with one of the plurality of adaptive filters to receive the associated one of the adaptively filtered signals, and where each of the loudspeakers provides an audio output indicative of its associated one of the adaptively filtered signals; a microphone for measuring a sound pressure level located at a first positions and providing a microphone signal representing the useful sound signal; a control unit for optimizing filter coefficients of the adaptive filters such, that the actual transfer characteristics defined by the useful sound signal and the microphone signal approximates a target function which represents a desired transfer characteristics of the sound system. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification