sound – Physics Lens

An Aural Illusion for Teaching Frequency and Pitch of Sound

Written by Seng Kwangon May 20, 2018September 20, 2018

A recent trending phenomenon on the internet is the audio recording of a word, which is interpreted different by two groups of people - those who hear it as "Laurel" vs those who hear "Yanny". To find out which camp you are on, right-click to download this mp3 file and or listen by clicking the

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Measuring Speed of Sound

Written by Seng Kwangon December 25, 2011

Measuring the speed of sound can be done using several methods. The following makes use of the understanding of stationary waves in pipes with one closed end. Such a pipe will have a fundamental mode that looks like this: