It is presented a sensor comprising a sensor plate (14), a base piece (15) and a first sensor membrane (7a) and a second sensor membrane (7b), each having a side of positive electrical polarity and a side of negative electrical polarity. Each one of the first sensor membrane and the second sensor membrane is mounted between the sensor plate and the base piece while allowing movement of the sensor plate in relation to the mounting piece. The first sensor membrane and the second sensor membrane are mounted such that their respective sides of positive electrical polarity face each other or face away from each other. A corresponding electronic stethoscope is also presented.
