超声波学。手持探头式多普勒胎儿心音检测器。性能要求和测量及报告方法。
Ultrasonics. hand - held probe doppler foetal heartbeat detectors. performance requirements and methods of measurement and reporting.
1970年以来，医生们常规听取胎儿心音，尽管没有确凿证据表明这有什么好处。
Since the 1970s, doctors have routinely listened to fetal heartbeats despite no real evidence that it did any good.
采用小波分析方法对胎儿心音信号进行处理是一种尝试，得到的结果基本上令人满意。
Adopt wavelet transform to analysis and process the signal of heartbeat sound is a kind of trail, and the result that get is basic to ascend to give satisfaction.
文中对胎儿心音信号的获得，心音信号的处理进行了详细的介绍，并给出了详细的电路结构。
About how to obtain and process the signal of fetal heartbeat, I had gave the detail introduction, at the same time, I gave a detailed electric circuit construction.
胎儿心音换能器是分娩监护系统中的关键部件，目前使用的胎心音换能器的主要问题是抗干扰能力差。
The fetal heart sound transducer is a Key component of the delivery monitor. The main problem with traditional transducers is their low anti-interference ability.
胎儿心音换能器是分娩监护系统中的关键部件，目前使用的胎心音换能器的主要问题是抗干扰能力差。
The fetal heart sound transducer is a Key component of the delivery monitor. The main problem with traditional transducers is their low anti-interference ability.
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