The effect of low frequency reverberation on Chinese speech intelligibility in two classrooms

Abstract

The previous study had investigated the students’ speech perceptions in two primary school classrooms with similar reverberation time and found that the speech intelligibility in a classroom was better than that in other one. It is speculated that due to difference in the improvement in low frequency reverberation. In this study, the reverberation time and speech transmission index were obtained and compared from these two classrooms by simulated. The subjective Chinese speech intelligibility was evaluated through simulated binaural room impulse responses. The effect of low frequency reverberation on Chinese speech intelligibility in two classrooms was discussed. The result shows that improving the low frequency characteristic of reverberation time can be helpful to improve the Chinese speech intelligibility in classroom.