Method for performance measurement and optimization of sound systems using a sliding band integration curve
First Claim
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1. A method for using microphones and a signal measuring system to measure and optimize a sound system in a listening room, said method comprising the steps of:
- (a) measuring the direct sound electro-acoustic response (“
direct sound response”
) of a loudspeaker;
(b) measuring the sound power electro-acoustic response (“
sound power response”
) of a loudspeaker;
(c) determining the average direct sound level;
(d) determining the average sound power level;
(e) determining a compensation value by calculating the difference between the average direct sound level and the average sound power level;
(f) calculating a compensated direct sound response by subtracting the compensation value from the measured direct sound;
(g) determining a weighted sound power response and weighted compensated direct sound response by weighting the sound power and the compensated direct sound response over a range of frequencies following a set of weighting values that represent auditory sensitivities to direct sound and sound power sounds;
(h) combining the weighted sound power response and the weighted compensated direct sound response additively to calculate a weighted combined response; and
(i) visually representing the weighted combined response.
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Abstract
A method for performance measurement and optimization of sound systems using electroacoustic measurements and a sliding band integration curve. Nearfield and spatially and temporally averaged broadband farfield responses are measured, averaged over a distinct set of frequencies, level matched, and weighted using a frequency-dependent ratio. The two curves are then combined to produce a third curve. The results indicate system performance in a listening space that matches human sensory response and provides means to optimize the sound system for the listening space.
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Citations
24 Claims
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1. A method for using microphones and a signal measuring system to measure and optimize a sound system in a listening room, said method comprising the steps of:
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(a) measuring the direct sound electro-acoustic response (“
direct sound response”
) of a loudspeaker;(b) measuring the sound power electro-acoustic response (“
sound power response”
) of a loudspeaker;(c) determining the average direct sound level; (d) determining the average sound power level; (e) determining a compensation value by calculating the difference between the average direct sound level and the average sound power level; (f) calculating a compensated direct sound response by subtracting the compensation value from the measured direct sound; (g) determining a weighted sound power response and weighted compensated direct sound response by weighting the sound power and the compensated direct sound response over a range of frequencies following a set of weighting values that represent auditory sensitivities to direct sound and sound power sounds; (h) combining the weighted sound power response and the weighted compensated direct sound response additively to calculate a weighted combined response; and (i) visually representing the weighted combined response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of measuring and optimizing sound system performance for loudspeakers in a given listening room, comprising the steps of:
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(a) taking at least one electro-acoustic broadband sound measurement in the nearfield of the loudspeakers; (b) taking a spatially and temporally averaged broadband farfield response measurement from multiple locations in the listening room in the region around the listening position; (c) collecting and using data storage means for storing the measurement data from steps (a) and (b); and (d) calculating the weighted sound power response by weighting the sound power and the compensated direct sound response over a range of frequencies following a set of weighting values that represent auditory sensitivities to direct sound and sound power sounds. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification