2. • The Ruben’s tube, also known as the standing wave
flame tube, or simply flame tube, is a physics
experiment demonstrating a standing wave.
• It shows the relationship between sound waves and sound
pressure.
Editor's Notes
What is rubens tube?What does it do?
So basically this is Based on Bernoulli's principle, the gas flow is proportional to the square root of the pressure difference between the inside and outside of the tube.