When receiving radio stations or small signals from radios, radio cassette recorders, and walkie-talkies, there are often serious noise disturbances that can't be heard. Even if you can barely listen, the ears will feel very uncomfortable after a long period of noise stimulation. . The anti-interference receiving add-on described here can significantly reduce the noise and make the received signal clearer. The device is simple and practical, easy to manufacture, and low in cost, and is mainly used as an anti-interference receiving language signal such as a radio. It is suitable for remote cities and towns and towns with weak signals and large interference.
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