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BIRD WARBLERS
National Standard: B3
“...Sound is produced by vibrating ... The pitch of the sound can be varied by changing the rate of vibration ...” 1
Suggested Use
Vibration produces sound. As you blow air through this device, use a pipette to slowly add water. The sound will change until the vibration produces a sound like a warbling bird! (Be sure to disinfect the mouthpiece before each use.) Related concepts: wavelength, pitch, frequency, etc.
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