A dual-sensor stethoscope, or retrofit device for a stethoscope, promotes anti-sepsis and stereoscopy through use of a substantially rigid, generally T-shaped tube for support of dual stethoscope heads. Each head may be rotated away from a body independently for use of a single head or rotated into the same general plane for dual-head stereoscopy. A clinician can create a spatial, three-dimensional (3D) anti-septic barrier and avoid the need to carry multiple stethoscopes. During stereoscopy, the use of a common tube allows the transmission of sound with constructive interference of sound waves. The substantially rigid, generally T-shaped support tube allows a clinician to auscultate with one hand and monitor two locations without transference of pathogens.