| 摘要 |
PURPOSE:To enlarge a range to cancel noise by providing first and second load adders and an adaptive processor to control an internal coefficient so that a function outputted form the second load adder can be decreased, and to execute an output while convolving the output of the first load adder and the internal coefficient. CONSTITUTION:The noise is inputted from an acoustoelectric converter group 11 and a load adder 13 calculates a sum while weighting respective input signals. Next, a sound mixing the noise is inputted from an acoustoelectric converter group 12 and a load adder 14 calculates the sum while weighting the respective input signals. An adaptive processor 15 controls the internal coefficient so as to decrease the function outputted, from the load adder 14 and convolves the output of the load adder 13 and the internal coefficient. An acoustoelectric converter group 16 loudly speaks the output of the adaptive processor 15 at plural places. Thus, the adaptive processor is made immune to the noise not related to the noise to be canceled, and the range to cancel the noise can be enlarged, further. |
