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一、基本原理磁带录音机是一种以磁带为载音体记录和重放声音的机器。首先,声音通过传声器被变换成电信号,电信号经电路放大和频率校正,送到录音磁头,录音磁头把得到的电信号变换成磁信号,磁信号使运动着的磁带磁化。于是就以磁带剩磁的形式把信号保存下来,这就是录音。重放时,录音磁带以录音时的同样速度运动。通过磁带与放音磁头的接触作用,放音磁头把分布在磁带上的剩磁信号变换成电信号,电信号经放大和频率特性校正,再通过功率放大送给扬声器,扬声器把得到的电信号变换成声音,称放音。可见,一台完整的录音机,录音时要进行:“声→电→磁”的变换。放音时则进行:“磁→电→声”的变换。
First, the basic principle Tape recorder is a tape as a recording and playback of sound recording machine. First of all, the sound is converted into electrical signals by the microphone. The electrical signals are amplified by the circuit and corrected in frequency and sent to the recording head. The recording head converts the electrical signals obtained to magnetic signals. The magnetic signals magnetize the moving magnetic tape. So to tape residual signal in the form of preservation, and this is recording. During playback, the tape moves at the same speed as when recording. Through the contact of the magnetic tape with the playback head, the playback head transforms the residual magnetic signal distributed on the magnetic tape into an electrical signal, which is amplified and corrected by the frequency characteristics and then sent to the loudspeaker through power amplification. The loudspeaker sends the obtained electrical signal Transform into sound, called the sound. Visible, a complete tape recorder, recording to be carried out: “sound → electricity → magnetic” change. When playback is carried out: “magnetic → electric → sound” transformation.