听声原理 principle of hearing
发声原理 vocalism principle
水声原理 hydroacoustic theory
超声原理及应用 Principle of Acoustic surface wave
噪声原理及分析 Principle & Analysis of Noise
声学原理 acoustical principle ; Baisc Principle of Acoustics
电声互易原理 [物] electroacoustic reciprocity principle ; [物] electroacoustic reciprocity theorem
常用声学原理 standard acoustical principle
超声波原理 Ultrasonic principle
超声声速测定原理 ultrasonic velocity measurement principle
声音粒子，即声子，和光的粒子(光子)或者其他基本粒子，都受海森堡的不定性原理影响。
And particles of sound, known as phonons, are just as susceptible to Heisenberg's uncertainty principle as particles of light (photons) -or, indeed, any other fundamental particle.
他们都采用同样的基本原理：一个32,768 Hz石英晶体摆动装置，同时还有电子和机械部件将振动转化成钟表的滴答声。
They all use the same basic mechanism: a 32, 768hz quartz-crystal oscillator, along with the electronic and mechanical parts that convert its oscillations to clock ticks.
苹果公司一定不会承认在新款iphone中植入了“声龙听写”软件Dragon Dictation(一款曾经的免费软件)，但这确实让人怀疑；因为这两块软件的工作原理和表现几乎一样的出色。
Apple won't admit that it's using a version of Dragon Dictation, the free iPhone app, but there doesn't seem to be much doubt; it works and behaves identically.
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