The Use of Sound Waves to Demonstrate
Radar and Stealth Technology - Physics Fair

Created For:

Grade 11 Physics


Since radar is based on the concepts of echo and Doppler shift, which is understood in the domain of sound, we can use sound waves to demonstrate and examine radar characteristics. This project includes an experiment to compare the ability of variously shaped and textured objects to absorb and reflect sound waves. This is accomplished by using a computer to transmit and receive an audio frequency tone in order to measure the amount of sound that an object reflects back. The results are used to further explain the concepts of radar and stealth technology.

Skills Applied:

Sound Radar Device – includes a speaker to transmit sound waves and microphone to receive them back.



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