Bernoulli'S Principle - Thin Metal Sheets

Purpose

To demonstrate Bernoulli's principle and a model of the vocal cords.

Equipment

Mounted aluminum sheets, as photographed.

Images

f5-03

Description

Blow down between the thin sheets. The sheets pull together due to the low pressure caused by the high velocity of the airstream, according to Bernoulli's principle. When the sheets close, air pressure builds up, opening them and restarting the periodic cycle. This is suggested by many knowledgable persons as a model of how the vocal folds function.◙