A resonance box is a type of physics laboratory apparatus used to study sound waves and resonance phenomena. It consists of a hollow box, typically made of wood or metal, with one or more openings on the sides. The box can be used to create standing waves at various frequencies, which can be studied using different techniques such as microphones, wave meters, and oscilloscopes.

The resonance box can also be used to study other properties of sound waves, such as frequency, amplitude, and wavelength. It is commonly used in physics and engineering courses to teach students about the principles of sound waves and resonance.