DH法计算孔径分布程序的编制和应用

Analysis of the Sonograms of Andrias davidianus

根据Ｄｏｌｉｍｏｒｅ－Ｈｅａｌ的计算公式，采用ＢＡＳＩＣ语言，编制了在ＩＢＭ机上进行计算固体表面孔径分布的计算机程序．利用本程序计算的数据与原始文献有很好的重复性和可靠性．

The natural and evoked calls by electrical stimulation of the midbrain in Andrias davidianus were recorded with the tape recorder. Recordings were examined using a kay sonagraph set (Model 662B) in the narrow-band filter mode. The results showed that there are difference between natural and evoked calls in call period,frequency,sound energy and harmonics.Natural call sound similar “? ぁ? call period is about 0.6 s, freqency is in 1.5～8.5kHz, foundamental freqency is in 1～2 kHz, energy release respectively. Evoked call sound similar “gá—gá”, call period is about 0.8～1.0 s, frequency is in 200Hz～12kHz, foudamental freqency is below 1 kHz, and energy release concentracally. Compared with the natural call,evoked call has longer call period, wider freqency range, higher foudamental freqency, and concentrical energy release. The results suggest that midbrain of Andrias davidianus play a predorminant role in vocal control related to motion. As demonstrated in our previous work in frog, lizard, bird, the role of the midbrain in animal vocalization is similar in evolutionary process.