本文描述了一种新型的换能器。这种换能器基于感应原理,它可以探测来自母亲腹壁的胎儿运动和声音。为了探测胎儿独特的呼吸运动产生的极其微弱的声音信号,换能器的顺应性应该和母亲腹壁的顺应性匹配。换能器与母体接触部分是一个膜,膜的张力可以调节,以便与组织和换能器的顺应性匹 This article describes a new type of transducer. Based on the sensing principle, this transducer detects fetal movement and sound from the mother’s abdominal wall. In order to detect the extremely weak sound signal produced by the fetus’s unique respiratory motion, the compliance of the transducer should match the compliance of the mother’s abdominal wall. The transducer is in contact with the parent part of a membrane, the membrane tension can be adjusted to meet with the organization and the transducer