Abstract: A mattress, adapted to benefit an occupant in the prone position, having a convexity in the head and torso support area, means for producing a rising and falling motion of the convex support surface, and a sound projecting means located within the convexity and connected with a record player. The surface of the convexity may be "laterally ventilating." The means for causing the rising and falling motion may be fluid dynamic devices driven by motorized reciprocating mechanism or it may be fully mechanical. The leg support surfaces are at least in part lower than the convex support surface and may be separated by a narrow elevation positioned to act as a stop or seat to prevent the occupant from slipping from the convexity. The object is to provide an atmosphere of healthful tranquility for the occupant. It is particularly advantageous for use with a young infant or a mental patient.