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The present study describes the characteristics of visceral injuries of rabbits exposed to a wide-band noise field of 168 dB sound pressure level.The experimental results demonstrated that thesites of the injuries are dependent to a certain extent on the postures of the animals.For animalsin free body posture or in prone posture,the most vulnerable organs are the lungs,which are opento the external environment,and the next are the hollow organs(with empty cavities)such as thestomach and intestines.For animals exposed in supine posture,the heart is usually very seriouslyinjured.Besides,the liver,which is situated near the abdominal wall,will also show some significantinjuries.The characteristics of these visceral injuries reveal that the primary cause of those patho-logical findings is the mechanical effect of the sound waves. 相似文献
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沈 《声学学报:英文版》1983,(2)
Some results from the study of the physiological effects of high level broad-band noise fields(165-173 dB)on guinea-pigs are presented in this paper.The lethal time for guinea-pigs undervarious sound pressure levels was determined.The logarithm of exposure time and the sound pres-sure level had good linear correlation.The experimental results showed that lethal time was decreasedby half if the sound pressure level was increased by 3 dB.These results agreed with the law ofequal energy and showed the death of guinea-pigs depended on the noise-dose,i.e.the noise in-tensity times the exposure duration.The average value of the lethal noise-dose is a constant,about33 J/mm~2. 相似文献
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