| 白鱀豚额隆声衰减和声速的测量 |
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| 引用本文： | 华明龙,钱振德,周开亚,王雨初,唐天雪.白鱀豚额隆声衰减和声速的测量[J].兽类学报,1987,7(2):85. |
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| 作者姓名： | 华明龙 钱振德 周开亚 王雨初 唐天雪 |
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| 作者单位： | 1. 南京工学院无线电工程系;2. 南京师范大学生物系;3. 上海第六人民医院超声波室 |
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| 摘 要： | 本文用水浴法测试了白鱀豚额隆切片标本沿体轴方向的声压衰减系数和声速。实验表明额隆内有若干点声衰减为负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。再将这些点连接起来看、恰巧和从左、右鼻栓到头前部的水之间的声传输相一致、这两条途径看起来有点像小声道似的。
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| 关 键 词： | 白鱀豚 额隆 超声衰减 声速 |
THE MEASUREMENT OF ULTRASONIC ATTENUATION AND SOUND VELOCITY IN THE MELON OF THE BAIJI (Lipotes vexillifer) |
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| HUA Minglong,QIAN Zhende,ZHOU Kyaia,WANG Yuchu,TANG Tianxue.THE MEASUREMENT OF ULTRASONIC ATTENUATION AND SOUND VELOCITY IN THE MELON OF THE BAIJI (Lipotes vexillifer)[J].Acta Theriologica Sinica,1987,7(2):85. |
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| Authors: | HUA Minglong QIAN Zhende ZHOU Kyaia WANG Yuchu TANG Tianxue |
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| Institution: | 1. Department of Radio Engineering, Nanjing Institute of Technology;2. Department oj Biology, Nanjing Normal University;3. Sixth People's Hospital, Shanghai |
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| Abstract: | This paper describes the measurement of ultrasonic attenuation and sound velocity in the melon slices of the Baiji (Lipotes vexillifer) . The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero. It meant that the sound pressure increased instead of decreased when the sound wave propagated along these points. Connecting these points from one to another,we found two sound paths looked like two small sound channels and happened to coincide with the direction from the nasal plugs of the dolphin to the water in front of the head. |
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| Keywords: | Baiji Lipotes vexillifer melon Ultrasonic attenuation Sound velocity |
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