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The goal of this experiment is to determine the speed of sound in air. To measure the speed of sound, I used two smartphones and an app called Phyphox This app uses the microphone of the smartphone to detect the time between two acoustic events The “acoustic stopwatch” tool on the app is used to measure the time between two sound signals These two signals are produced by hand clapping In this experiment, the speed of sound is determined using the time of flight method This method is based on measuring the time delay between the generation and the detection of a sound signal of finite duration This method is used for many applications in science and technology In medical ultrasound, the speed of sound is used to distinguish between different tissues in the body.


This poster, first place winner for STEM individual projects, was presented at the 35th Semi-Annual Dr. Janet Liou-Mark Honors & Undergraduate Research Poster Presentation, Dec. 2, 2021. Mentor: Prof. Boris Gelman (Physics).

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