An earpiece assembly has a pair of earpieces, a pair of foldable flex spring members, and a manifold with each foldable flex spring member connecting one of the earpieces to the manifold. A drum assembly has a diaphragm mounted therein and a tube extending therefrom with the diaphragm being particularly adapted to expand and contract in response to pressure changes within a patient when the drum assembly is in proximity to the patient. A stem assembly has a housing, a pressure sensor extending from the housing, a circuit board positioned within the housing, and a light source connected to the circuit board and extending from the housing. The stem assembly connects the manifold to the tube to connect the earpiece assembly to the drum assembly. The pressure sensor measures responses to pressure changes within the drum assembly and communicates with the circuit board, so that the circuit board can activate the light source to produce a flashing light pattern that corresponds to pressure changes within the patient.