How do boomwhackers form pitches?
Boomwhackers are made from different peices of wood, plastic, or
other materials. These are cut into different sizes, normally by
length. These lengths determine the piches the boomwhacker makes; a
shorter boomwhacker will make a higher pitch than one that is
longer, which makes a lower pitch. When you hit the boomwhacker,
the acoustics in the longer tubes vibrate longer, making the pitch
deeper. The acoustics in the shorter tubes vibrate for a shorter
time, making the pitch higher.