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在10℃—50℃温度范围内和0.8MHz—5MHz频段,测量了有代表性的十几种国产塑料的声学特性。结果表明:在所用温度和频率条件下,声速与温度之间,衰减系数与频率之间,均呈良好的直线关系。
In the temperature range of 10 ℃ -50 ℃ and 0.8MHz-5MHz frequency band, the acoustic properties of a dozen domestic representative plastics were measured. The results show that there is a good linear relationship between the speed of sound and the temperature, the attenuation coefficient and the frequency under the conditions of temperature and frequency used.