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Teacher Developed Classroom Tested

From infrasonic (below human hearing) to ultrasonic (above human hearing) and the symphony of frequencies we humans can hear in between, this wonderful chart brings all the “colors” of the sound spectrum into your classroom.
Explains why you can’t hum the sound of an ocean wave or the rhythm of a rainstorm but can hum along with your vacuum cleaner or power drill (although I’m not sure why you would want to), how animals sort the sound of members of their own species from the cacophony of nature, and more.
Also traces the creation of a vibration and shows how it is captured by the ear and decoded and processed by the brain into sound. An excellent resource tool. Measures: 86 cm x 55 cm.

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