聴覚による異常診断訓練システム : ―4ストロークディーゼル機関の音響合成―

概要

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The fact, that the crew find 50-90% of troubles of the marine diesel engine in the MO ship, implies the human sense of hearing plays a crucial role in the diagnosis of the engine. And the hearing ability to diagnose is improved by experience in hearing the abnormal sounds. But now the crew have little opportunity for hearing abnormal sounds.<BR>It is proposed the training system for the improvement in the hearing ability using artificial sythetic sounds in place of original sounds which is very difficult to collect. In this paper, the normal and abnormal sounds of a four-stroke diesel engine are sythesized by means of the frequency modulation synthesis and the addition synthesis.<BR>The synthetic sounds simulate the original sounds exactly, as the result of the comparison of the synthetic and original sounds by hearing and observation of the waveforms.