摘要
障板的反射系数一般是指声波垂直入射时的反射声波与入射声波的幅值比,不能全面反映障板的使用效果。在实际应用中,障板的实际增益受到障板自身的声特性、换能器到障板的距离、声波入射角度、声波频率等众多因素的影响,反射系数很高的反声障板,实际增益却可能为负。本文使用相对灵敏度级(Relative Sensitivity Level)来衡量反声障板的"真实"增益,论述了相对灵敏度级的计算方法,对影响反声障板增益的因素进行了研究。
The reflection coefficient of a baffle, which is the amplitude ratio of reflect wave to vertically incident wave, can not completely represent the effect of the baffle. The ＂real＂ gain of a baffle is determined by several factors, such as acoustic characteristics of baffle, distance between transducer and baffle, incident angle of acoustic wave, frequencies of acoustic wave, etc. For example, the real gain of a baffle, which has a high reflection coefficient, may be negative. In this paper the Relative Sensitivity Level （Relative Sensitivity Level） is used to represent the ＂real＂ gain of a baffle. The calculation method of RsL and the factors which influence the gain of reflection baffle are studied.
出处
《应用声学》
CSCD
北大核心
2011年第3期187-192,共6页
Journal of Applied Acoustics
基金
国家高技术研究发展专项经费资助
关键词
反声障板
相对灵敏度
反射系数
障板增益
Reflection baffle, Relative Sensitivity Level, Reflection coefficient, Gain of baffle
