What is the frequency range of the ultrasonic sound waves used by the – McqOptions

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1.	What is the frequency range of the ultrasonic sound waves used by the ultrasonic sensors?
A.	20000Hz to 25000Hz
B.	25KHz to 50KHz
C.	25Hz to 55Hz
D.	25Hz to 50Hz
Answer» C. 25Hz to 55Hz

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