| 摘要 |
PROBLEM TO BE SOLVED: To make an adequate evaluation by verifying the result of a circuit simulator conducted in a process for designing a voice output circuit by actually listening to a reproduced voice. SOLUTION: The voice output circuit is subjected to the circuit simulator based on data which describe design values and operational conditions generated in a circuit designing stage, and a circuit operation is executed on a computer, and then voice data such as pop noises and so on are obtained as the result of the simulation. At the next stage, the simulated voice data (data of format for display on a PC) are converted to voice data (PCM) to be used in a voice reproducing device through a format such as WAV and so on. When the voice reproducing device is installed in a device which mounts a circuit, the same voice reproducing jig is used. The PCM voice data are converted by this jig to analog voice signals with DAC, and the pop noises or the like are evaluated by actually listening to the above voice signals reproduced through a headphone circuit. COPYRIGHT: (C)2004,JPO&NCIPI
|
