A resonance apparatus is used in the demonstration of standing waves. It can be used to observe the resonance phenomena, the speed of sound in air by exploiting standing waves, resonance effects in longitudinal waves, and resonance points for a certain frequency and their relation with the standing wavelength. Partially fill the resonance tube with water and then sound a tuning fork of known frequency at the open upper end of the Resonance Tube. The water level can be adjusted until the air in the tube resonates at the same frequency as the tuning fork which increases the volume of the sound. Our Deluxe Resonance Apparatus has a resonance tube, a funnel, and a connecting length of tubing attached to a sturdy base with clearly written graduations on the board behind the tube.