To measure the speed of ultrasound, the time base is used to trigger an ultrasonic transmitter.The transmitter sends out a short pulse of ultrasound and the receiver detects the pulse.The receiver signal is applied to the Y-input of the oscilloscope.Calculation:The horizontal distance from the transmitter to the receiver is measured.The travel time of the pulse from the transmitter to the receiver is determined.E.g. time = 0.2 mscm-1pulse distance from start = 3.5cmtime = 0.2 x 3.5 = 0.7ms
| speed | = | distance from transmitter to receiver time |