音声信号の一部を削除した場合の明りょう度に関する実験的研究

抄録

The intelligibility of intermittently eliminated Japanese speech wave is discussed in this paper. In our experiment, a segment of a Japanese speech wave is intermittently removed by varying the erasing duration and the period. Here, ratios of the erasing duration to period are varied from 10 : 90 to 90 : 10 every 10 percent. Listening tests for evaluating the intermittently eliminated speech wave have been carried out by about 600 males aged from 21 to 25 years. Experimental results show that the intelligibility of the composite tones deteriorates linearly. In the case of the period being short, however, the intelligibility of speech wave is more than 90 % even though ninety percent of the speech wave in one period is removed.