语言用厅堂在自然发声条件下听闻极限距离的确定

Determination of limiting audibility range in lecturing hall having natural speech acoustics

为了使具有听音要求的房间具备良好的声学条件,通过对语言清晰度、听众接收到的声压级、听众的听闻阈、演讲者的口语声可懂度等值线、听闻者的辨别阈、室内的声学条件、房间体型、室内背景噪声等参数的极优取值,可得出室内听闻极限距离等于20.32 m.

In order to achieve good indoor acoustic condition within a lecturing hall where definite audibility is required, some parameters, such as speech articulation, sound-level available to the audience, threshold of hearing by the audience, understandability isoline of orator＇s speech, discriminatin threshold of the audience,indoor acoustic condition, hall configuration, indoor background noise, etc are optimized so that the indoor limiting audibility range can be determined as being 20. 32m.