| 摘要 |
PURPOSE:To reduce memory capacity and to simplify the constitution of a post-processing circuit, by converting sound collection input to digital data which is, in turn, squared, cumulated and added while receiving the cumulated and added data in memory. CONSTITUTION:The first impulse from a sound source 3 is collected by a microphone 4-1 and the collected impulse response is amplified by an amplifying circuit 6 to be supplied to an analogue/digital converter circuit 7. The signal converted by the analogue/digital converter circuit 7 is squared by a square circuit 8 and inputted to an accumulator 9 to be successively cumulated in the timing of a signal C-1. This cumulated value is successively inputted to a register 10 in the timing of a signal C-3 and the content of the register 10 is successively added to the content of a register 12 in the timing of the signal C-3 by an adder circuit 11. This added result is stored in a random access memory 14 and inputted to a register 13. |
