1、 Because of ultrasonic attenuation in organism is proportional to frequency, 2 MHz ultrasonic distance and receiving sensitivity.
超声波在生物体中的衰减与频率成正比, 使用2MHz超声换能器由于衰减大致使穿透深度小、接收灵敏度低、仪器综合灵敏度难以提高.
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2、 The clock frequency is 1 MHz. The device samples sensor - read data during the write operation.
时钟频率为1兆赫. 在写操作的过程中,设备从传感器独处的数据总取样.
来源:互联网
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