Patent ID: 7864631
Filing Date: 2011-01-04
Classification: H04R,H04S

Abstract:
1. A method of determining the distance (d 12 ) between two loudspeakers (L 1 , L 2 ), the method comprising: providing a test signal (N), wherein the test signal (N) comprises white noise in which all frequencies of the white noise are equally represented; combining the test signal (N) with a sound signal (S) to give a combined signal (S issuing the combined signal (S detecting the combined signal (S processing the detected combined signal (Z) to obtain an acoustic impulse response (IR), wherein processing the detected combined signal (Z) comprises accumulating the received combined signal to increase a ratio of the test signal contribution to the host signal by sampling and storing the detected combined signal in a buffer with the same length as a period of repetition of a test sequence of the test signal; and using the acoustic impulse response (IR) to determine the distance (d