电话在日常生活中已非常普及,其种类和功能也数不胜数。但就一些如自动留言、在线录音、在线放音等功能而言,在普通话机上并不多见。普通录音电话录音时是用话筒拾取话机发出的声音,放音时将播放器的声音直接送给话机的送话器。这种录放方法虽然操作简便,但由于环境噪声的影响及话机本身质量的制约,其录放效果很差。本文所介绍的多 Telephones have become very popular in everyday life, and their types and functions are numerous. However, some functions such as automatic message, online recording, online playback and so on, are rare on the ordinary phone. Ordinary recording telephone recording is the voice picked up by the microphone to pick up the phone, the player’s voice playback directly to the phone’s microphone. Although this recording and playback method is simple and convenient, its recording and playback effects are very poor due to the influence of environmental noise and the quality of the telephone itself. This article describes more