Michelsen A, Heller K G, Stumpner A, Rohrseitz K
Centre for Sound Communication, Odense University, Denmark.
J Comp Physiol A. 1994 Aug;175(2):145-51. doi: 10.1007/BF00215110.
A method is described for measuring the gain (i.e., the change of amplitude and phase angle) for sounds that propagate to the internal surface of the tympana in ears working as pressure difference receivers. The gain of the acoustic trachea has been measured in two similarly sized and closely related species of bushcrickets, in which the acoustic spiracles and tracheae differ markedly in size. The amplitude part of the gain is much larger in the species with the larger acoustic spiracle, whereas the phase part is very similar in the two species. The method is compared with other methods, which in the past have been used for estimating the gain of sound pathways inside animal bodies.
本文描述了一种测量增益（即振幅和相位角的变化）的方法，该方法用于测量在作为压差接收器的耳朵中传播到鼓膜内表面的声音的增益。在两种体型相似且亲缘关系密切的螽斯物种中测量了声气管的增益，这两种螽斯的声气门和气管在大小上有显著差异。在声气门较大的物种中，增益的振幅部分要大得多，而相位部分在这两个物种中非常相似。将该方法与过去用于估计动物体内声音传播路径增益的其他方法进行了比较。
