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What Is Sound?
How Do You Change Sounds?
air molecules move bang bells bounce brain CD player change the pitch column of air cookie sheet create sounds distance drum or tambourine ear canal eardrum Edison electric current EXPERIMENT STEPS family of musical feet 340 meters finger follow the steps frequency glass vibrate guitar hear sounds heard hertz higher human voice humans can hear larynx loud Marin Mersenne microphone molecules move back molecules moving fastest moving air musical instruments vibrate noise number of sound objects underwater outer ear partly of sound pattern of pits phonograph pits and flats plastic Pluck or strum produces sound radio or CD recording rice or sugar ripples SCIENCE ANSWERS EXPERIMENT sends out sound siren Sound Travel Sound waves hitting speed of sound strike your ears sugar grains throat travel through air troughs tube Ultrasound vibrating string vocal cords voice sound wave's arrival wavelength crest waves pass wind instruments wooden spoon yogurt container vibrate