摘要
由9 000多人参加的大型学术年会在一个13 000m2的展览中心召开。该展览中心是一间无任何建筑声学装修,混响时间长达10s的特大展厅。在如此恶劣的建声条件下,如何进行扩声,是本文主要论述的问题。本文论述采用60台基于DSP的可控指向性声柱,通过精准的声场覆盖设计和调控,不添加任何吸声措施的条件下,让全场能清楚听到演讲者的声音,现场实测语言传输指数STI-PA达到0.52(0.5以上即为及格),使整场大会顺利进行。
A large-scale annual academic conference attended by more than 9 000 people was held in an exhibition center of more than 13 000 square meters.The Exhibition Center is a large exhibition hall with no architectural acoustic decoration and reverberation time of up to 10 seconds.Under such harsh construction conditions,how to carry out sound reinforcement is the main issue discussed in this paper.This paper discusses the use of 60 controllable directional speakers based on DSP,through accurate soundfield coverage design and regulation,without adding any absorption measures,so that the whole audience can clearly hear the speaker’s voice,the field measured language transmission index STI-PA reaches 0.52(above 0.5 is pass),so that the whole conference can proceed smoothly.
作者
童华炜
罗文轩
杨宏臻
TONG Huawei;LUO Wenxuan;YANG Hongzhen(Guangzhou Grander Technology Co.,Ltd.,Guangzhou 511400,China)
出处
《电声技术》
2019年第5期19-24,共6页
Audio Engineering
关键词
DSP
可控指向性
STI-PA
长混响
扩声设计
DSP
controllable directional
STI-PA
long reverberation
sound reinforcement design
