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1997年元旦和春节期间,由北京市政府组织、中国科学院声学研究所负责技术实施,完成了一项使用调制气流扬声器技术播放新年钟声的任务,产生了很好的社会影响。该项活动中所使用的气流扬声器技术的特点,讨论了针对永乐大钟的钟声播放要求,所设计实现的气流扬声器的技术参数;对钟声在城市环境中的传播和衰减进行了计算,并与实际的测量结果进行了比较,讨论了气象条件与城市环境等复杂因素对钟声远距离传播的影响。
During New Year ’s Day and Spring Festival in 1997, the Beijing Municipal Government and the Institute of Acoustics, Chinese Academy of Sciences, were responsible for the implementation of the technology and completed the task of using the modulated airflow speaker technology to play the New Year bells. This has had a very good social impact. The characteristics of air-flow speaker technology used in this activity are discussed, and the technical parameters of the air-flow loudspeaker designed and implemented in response to the bell broadcast of Yongle Bell are discussed. The propagation and attenuation of bells in urban environment are calculated, Compared with the actual measurement results, the influence of the complicated factors such as meteorological conditions and urban environment on the long-distance transmission of bells and bells is discussed.