Resonance is the tendency for a system or object to vibrate at a specific frequency or frequencies when excited (like a bow and violin string,) with the resonant frequency being determined by the physical parameters of the object or system. For example, when music is played at a loud volume in a space, certain features of the room may resonate to a greater extent than other aspects of the room. For instance, this in turn may cause bass buildup that would need to be removed by acoustic treatment.