Physics Lab Equipment

LEMI-53 Apparatus of Sound Speed Measurement & Ultrasonic Ranging

LEMI-53 Apparatus of Sound Speed Measurement & Ultrasonic Ranging

Features

  • High performance ultrasonic sensor

  • Simple structure, stable and reliable

  • Multiple experiments



Introduction

The propagation speed of sound waves is an important physical quantity. The measurement of sound speed is widely applicable in ultrasonic ranging, positioning, measurement of liquid flow rate, material's elastic modulus and changes of gas temperature. Ultrasonic emission and reception is also one of the important means of anti-theft, monitoring and medical diagnosis.


This experimental apparatus of sound speed measurement and ultrasonic ranging is specially designed for educational training in teaching labs. It can measure the speed and the wavelength of a sound wave propagating in the air, and perform an experiment on ultrasonic ranging, so that students can better understand the basic principles and experimental methods of wave physics. 


LEMI-53 apparatus has the following features: 

1. A compact high efficient ultrasonic sensor is used. It has a metal housing shield of strong anti-interference ability with strong reflection and reception signal;

2. The apparatus is simple in structure, easy in operation and reliable in data reading. 


Using this apparatus, the following experiments can be conducted:

1. Measure the speed of sound wave propagating in the air by the method of resonant interference.

2. Measure the speed of sound wave propagating in the air by the method of phase comparison.

3. Measure the speed of sound wave propagating in the air by the method of time difference.

4. Measure the distance of a barrier board by the method of reflection.


The instruction manual contains experimental configurations, principles, step-by-step instructions, and examples of experiment results. Please click Experiment Theory and Contents to find more information about this apparatus.


Parts and Specifications


DescriptionSpecifications
Sine wave signal generator:Frequency range: 30 ~ 50 kHz; resolution: 1 Hz
Ultrasonic transducerPiezo-ceramic chip; oscillation frequency: 40.1 ± 0.4 kHz
Vernier caliperRange: 0 ~ 200 mm; accuracy: 0.02 mm
Experimental platformBase board size 380 mm (L) × 160 mm (W) 
Measurement accuracySound velocity in air, error < 2% 


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Example of experimental results

(Click to enlarge)

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