Method for performance measurement and optimization of sound systems using a sliding band integration curve
OwnerAnthony Grimaniinventor
Life of this patent
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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.
Claims24
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.
The method of claim 7, wherein the time windowing of the signal from the microphone proximate the listening position is wide enough to allow direct sound and some reflections.
A method of measuring and optimizing sound system performance for loudspeakers in a given listening room, comprising the steps of:
- (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.
Dependencies are inferred from the claim text.