Sound detecting device for pelvic floor muscle exercise

A sound detecting device for pelvic floor muscle exercise includes: a main body, having a base seat; a sound collecting chamber, having an opening; an elastic sound receiving membrane, disposed in the main body and located at the opening; a support ring, disposed at a top end of the main body, arranged at a periphery of the elastic sound receiving membrane and corresponding to an outer periphery of the opening; a microphone, disposed at a bottom end of the sound collecting chamber; and an electric circuit board, disposed on the base seat, used for providing a wave filtering function and an amplifying function, connected to the microphone, and connected to at least one smart device installed with an application program (APP) through a Bluetooth device. As such, low frequencies generated when the pelvic floor muscle is relaxed or contacted can be amplified and precisely collected.