Pickup diaphragm

A pickup diaphragm, detachably installed in sleeve on a stethoscope head, comprising:

• a pickup part, used for picking up an audio and including a non-planar surface which is concave toward the stethoscope head, wherein the non-planar surface is a tapered surface;
• a suspension edge, including a deformable surface, in which a joint surface is respectively configured on the inner and outer sides of the deformable surface, and the joint surface on the inner side is fixedly connected to the periphery of the non-planar surface wherein the pickup part and the suspension edge are configured to have different materials and shapes so that the non-planar surface deforms during an audio pickup process;
• and
• an outer edge, including a ring groove, in which one side of the ring groove is set as a connection end while the other side thereof is set as an opening end, the inner side of the connection end is fixedly connected to the joint surface located on the outer side, and the stethoscope head is inserted through the opening end, such that the ring groove is placed in sleeve on the outside of the stethoscope head.