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汉语拼音：shēng sù

旧称音速。声波在介质中传播的速度。它同介质的性质和状态（如温度）有关。如在0℃的空气中声速约为每秒330米，在水中约为每秒1 440米。

1. 声波传播的速度。在不同的介质中声波的速度也有不同。如在0℃时，空气中声速每秒为331.36米，水中声速每秒约为1440米，钢铁中声速每秒约为5000米。也称音速。

• Chuck Yeager broke the barrier when he flew faster than the speed of sound in a rocket plane named after his wife.

  查克•叶格打破这一障碍，当他在一艘以他妻子命名的火箭发射器中飞行超过声速的时候。

• The results of experiment show that this correction method can adapt to a variety of rules of changes in the speed of sound of liquid media.

  实验结果表明，这种校正方法能适应各种不同规律液体媒介的声速变化。

• In this method the flight trajectory error and error ratio have been used as the input of controller.

  方法以高超声速飞行器飞行轨迹线偏差和线偏差变化率作为模糊控制器输入，采用模糊推理设计飞行控制系统。

• Variable bend tail concept may be one of the possible approaches for satisfying the maneuvering requirement of hypersonic reentry vehicle.

  可变弯尾飞行器的气动方案是高超声速机动的潜在可行方案。

• In this way, the system ensures that the air temperature measurement used in the speed of sound calculation is truly representative.

  这样，系统保证以声速估算的气温测量才是真实且具代表性的。

• In this work, an experimental study of the density and ultrasonic velocity in the ternary mixture (water-ethanol-saccharose) is presented.

  在这项工作中，实验研究的密度和声速三元混合物（水，乙醇，蔗糖）提出。

• These normally exceed sonic velocity with the consequence that the loom are noisy and consume considerable amount of energy.

  通常使用的气流速度超过声速，其结果是织机噪声的提高和能耗的增加。

• All the classic aerodynamic heating calculating methods developed by the scholars are analyzed systematically and classified.

  特别是对发展的各种高超声速气动热计算方法进行了系统的分析和总结。

• Every rock property, e. g. , permeability, compressibility, and acoustic velocities, has its own effective stress coefficient.

  每项岩石特性，比如渗透性、压缩性和声速等，均有其自己的有效应力系数。