The author's solution to this problem is to use a tuneable RF preamplifier which also acts as a low pass filter when tuning the low end of the 88-108 MHz band where most of the exotic channels lie.
作者的解决这个问题是使用可调谐射频前置放大器这也渠道作为一个低通滤波器调谐88-108兆赫时，低端的带异国情调的地方大部分的谎言。
Preamplifier and filter were used for cancellation of respiratory ECG, body interference.
利用前置放大器和滤波器有效滤除掉呼吸，心电，人体等干扰。
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