Who says you can’t un-ring a bell? As a team of acoustical engineers and a biomedical engineering student demonstrate, “destructive interference” can can silence even a huge temple bell – leaving a sleeping baby undisturbed.

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Filed under: Special Features | Comments Off on Unring A Bell? Acoustic Engineers Can!

Tags: acoustic engineering, bell, Contest, fun with technology, sound, sound wave, STEM education, unring a bell

Pairs of students in grades 3 – 5 investigate sound frequencies and acoustic engineering by creating four different instruments – a shoebox guitar, water-glass xylophone, straw panpipe, and soda bottle organ.

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Filed under: Class Activities, Grades K-5, Grades K-5, Lesson Plans | Comments Off on Simple Musical Instruments

Tags: acoustic engineering, build, Class Activities, Design, frequency, Grades K-5, guitar, hands-on activities, instrument, Music engineering, noise, sound, waves, xylophone