THE EFFECT OF ULTRASONIC WAVES ON THE CONDUCTIVITY OF SALT SOLUTIONS
THE EFFECT OF ULTRASONIC WAVES ON THE CONDUCTIVITY OF SALT SOLUTIONS
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DOI：
10.1103/physrev.70.329
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发表时间：
1946-01-01
期刊：
影响因子：
--
通讯作者：
ROCK, GD
中科院分区：
文献类型：
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作者：
FOX, FE;HERZFELD, KF;ROCK, GD
绝热压缩由于压力的直接影响和温度的升高而提高盐水溶液的电导率。因此，超声波会周期性地改变溶液的电导率。如果电流丝垂直于波的传播方向通过，波列在适当的条件下会产生一个交变电势，这个电势是可以被检测到的。这使每大气压和电压施加约220微伏的CuSO 4。(At波长短于电流的横向尺寸，则效果减小。）这允许构造一个方便的接收器，指示绝对强度，用于研究水中的超声波场，只要频率不超过1.5兆周。
An adiabatic compression raises the conductivity of an aqueous salt solution because of direct pressure influence and of temperature increase. An ultrasonic wave therefore modifies periodically the conductivity of the solution. If a filament of current passes normal to the wave propagation, the wave train produces under proper conditions an alternating potential, which can be picked up. This gives per atmosphere pressure and volt applied about 220 microvolts in CuS O 4.(At wave-lengths shorter than the cross dimension of the current, the effect decreases.) This permits the construction of a convenient receiver indicating absolute intensity for the investigation of ultrasonic fields in water, provided the frequency is not above 1.5 megacycles.