Patent ID: 6324289
Filing Date: 2001-11-27
Classification: A61B

Abstract:
A pick-up head for an electronic stethoscope, comprising at least one acousto-electrical transducer for providing at least one electrical signal representing acoustical vibrations, and at least one mechanical member coupled to said transducer for conveying said acoustical vibrations from a body surface to said transducer, wherein a sound influencing bell, which is acoustically decoupled from said at least one mechanical member, is arranged therearound for providing with an edge a delimited listening area on said body surface and for providing with its inside walls a sound-influencing cavity surface surrounding said at least one mechanical member and being adapted to reflect sound toward said at least one mechanical member, being adapted to reflect sound toward said at least one mechanical member, cavity wall angles, wall radii of curvature and wall surface material being decisive parameters regarding reflecting certain sound frequencies, andsaid at least one mechanical member is constituted by a straight, slender peg which is operative to pick-up at its front acoustical vibrations from said body surface through a peg front area that is a substantially smaller area than said delimited listening area, and laterally reflected, acoustical vibrations reflected from said cavity walls.