收录机在播放录音时往往会出现噪声,其原因:一是机器本身电路问题;二是磁带质量问题。本文要谈谈常见的由机器电路问题产生的噪声的消除办法及自已录制音带时怎样减小噪声的问题。一、由机器电路问题产生的噪声的消除办法 (1)“嗡嗡”的交流声交流声主要是在收录机电源部分产生。电源电路主要包括降压、整流、滤波三部分。降压部分的变压器漏磁感应是产生交流声的最大根源。判断变压器的优劣,一种简单的办法是接通电源后,靠近收录机能否听到嗡嗡声,听到嗡嗡声说明此电源变压器存在漏磁现象,应换上优质变压器。 Tape recorders often play when recording noise, the reason: First, the circuit itself, the machine itself; the second is the tape quality problems. This article addresses the common ways to eliminate noise caused by machine circuit problems and how to reduce noise when recording your own audio tapes. First, the noise generated by the machine circuit problems Elimination (1) “buzzing ” hum sound is mainly generated in the power supply part of the tape recorder. Power circuit includes buck, rectifier, filter three parts. Transformer leakage inductance part of the step-down is the largest source of hum. Judging the pros and cons of the transformer, a simple way is to turn on the power, close to the tape recorder can hear the buzzing sound, hum humming this power transformer leakage magnetic phenomenon, should be replaced by high-quality transformers.