抄録
In this research, we evaluate about masking effect on representative types of maskers such a noise type and a voice-compounded type. Each masker's features, and their applicable situations are examined in this paper. In the preceding studies of sound masking, various maskers have been proposed. For example, meaningless steady noise like spectrum limited pink noise, meaningless unsteady noise like environment noise has been proposed. However, few researches compare these masking effects. Therefore, this research aims to compare and investigate these maskers. This report examines masking effect by recognition rate while word pronouncing voice is masked.