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心音图心音图(phonocardiogram, PCG)是记录心音、心杂音的一种检查技术。记录心音图的仪器称为心音图仪,主要由四部分组成:微音器(传感器)、频率滤过器、放大器及记录器。先由微音器将心音或杂音的声能转变为电能,再由频率滤波器将某些频率削弱,而让某些频率无阻碍地通过,当所需频率输出
Phonocardiogram (phonocardiogram, PCG) is a recording of heart sounds, heart murmur, a check. Instrument recording phonocardiogram called phonogram instrument, mainly composed of four parts: the microphone (sensor), frequency filter, amplifier and recorder. The first microphone by the heart sound or murmur of the sound energy into electrical energy, and then by the frequency filter will be some of the weakening of the frequency, and let some of the unimpeded passage of frequency, when the desired frequency output