The amplified sound emerging from the loudspeaker will emit the audio waves in all directions. The sound heard by the person and the actual frequency of a person on the hill will be different. Person Shouting from the Valley TopĬonsider a person standing on the top of the hill and talking in a loud voice with a person standing down the hill. Read more on Does Sound Frequency Change With Medium: Why Not. Music Concert in Auditorium Image Credit: Pixabay If you hear a sound of a whistle from a train approaching a station, the frequency of the sound decreases as the train pass by you. Due to this, the frequency of a sound wave will frequently differ. Resonance from PipeĪ sound wave produced at one end of the pipe will set up the vibration in the air molecules inside a volume of a pipe producing a region of contraction and rarefaction. Read more on 10+ Example of Potential Energy to Sound Energy: Detailed Explanations. The variation in the frequency of the waves from the heavenly body can be used to determine the velocity of the body and the distance at which it is present. Astronomyĭoppler Effect has also made it possible to calculate the distance of the comet or asteroids approaching the Earth. RADARs are used as navigators for ships and airplanes during bad weather conditions. There are different software used to read the distance and the location of the obstacles from the source. RADAR technique used by sailors Image Credit: Pixabay
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