| 摘要 |
PROBLEM TO BE SOLVED: To increase a convergence rate. SOLUTION: A sum of square of each component of impulse response vector h1<(k)> , h2<(k)> between speakers 121 , 122 and a microphone 161 is found (321 , 322 ), its square root is found (331 , 332 ),μ1 =2a/(a+b),μ2 =2b/(a+b) are calculated (351 , 352 ), sum of square within a selection of time of received phone signal x1 (k), x2 (k) is found (27). h exponent 1<(k+1)> =h exponent 1<(k)> +(μ1 e(k)/(XT(k)X(k)) X1 (k), h exponent 2<(k+1)> =h exponent 2<(k)> +(μ2<e(k)> /(XT(k)X(k))X2<(k)> are calculated at estimating units 191 , 192 respectively to define pseudo reverberating paths 181 , 182 , through which x1<(k)> , x2<(k)> are passed to derive pseudo reverberating signal y exponent 1<(k)> , y exponent 2<(k)> , and y exponent 1<(k)> and y exponent 2<(k)> are subtracted from an output (k) of the microphone 16 to drive e(k).
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