Blowing across the open mouth of a bottle causes the air inside the bottle to vibrate. The vibrating air produces sound. The pitch of the sound is determined by how fast the air vibrates. As the air inside the bottle decreases it vibrates faster and produces a higher pitched sound. You could write the relationship […]
Musical Bottles
Using bottles to make music is fun for kids of all ages. The best presentation I’ve heard were seniors who played “Lean on Me” and along with the music from the various bottles, one student added a drum beat by tapping on the lab table. It really was awesome–too long ago for me to have […]
Sound: Blowing a Raspberry
Blowing a Raspberry means to make a sound by sticking out your tongue and blowing. The sound produced is much like the sound made by flatulence (farting). Sounds are made when something vibrates and air blown between your tongue and lips causes both to vibrate as seen in the video.
Sound Projects Using Wind Chimes
Wind chimes are made of objects that make interesting sounds when the wind causes them to they bump into each other. Make your own wind chimes by following these steps. Tie one 12-in (30-cm) piece of piece to each of 4 or more metal objects, such as spoons. Tie the free end of the strings […]