| 摘要 |
PURPOSE: A noise measurement apparatus is provided to simplify configuration of the apparatus and noise measurement procedures, while minimizing signal noise. CONSTITUTION: A noise measurement apparatus comprises a digital audio tape record device, and a computer device connected to the digital audio tape record device and which performs noise analysis. The digital audio tape record device includes a left channel(41) connected to a micro phone and an engine speed sensor, and which receives the noise signal sensed by the micro phone and amplified; a signal converter(42) connected to the left channel, and which receives the noise signal; an amplifier(43) for receiving and amplifying the speed signal detected by the engine speed sensor; and a right channel(44) for receiving the speed signal and the noise signal, in a synchronous and digital manner.
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