What are the parts of the sound

　　The components of the audio can be roughly divided into: the audio source (signal source) part, the power amplifier part and the speaker (speaker) part.

　　Sound source: The sound source is the source part of the sound system, and the final sound from the speaker comes from this. Common audio sources include: CD players, LP vinyl record players, digital players, radio tuners and other audio playback devices. These devices convert or demodulate audio signals in storage media or radio stations into audio analog signals through digital-to-analog conversion or demodulation. output.

　　Power amplification: The power amplifier can be divided into pre-stage and post-stage. The pre-stage preprocesses the signal from the audio source, including but not limited to input switching, preliminary amplification, tone adjustment and other functions. The main purpose is to make the output impedance of the audio source and the power amplifier. The input impedance of the rear stage is matched to reduce distortion, but the front stage is not an absolutely necessary link. The post-stage is to amplify the power of the signal output by the pre-stage or the audio source to push the speaker system to make a sound.

　　Speaker (speaker): The speaker of the speaker is an electro-acoustic transducer, and all signal processing parts are ultimately prepared for driving the speaker. The power-amplified audio signal moves the paper cone or diaphragm through electromagnetic, piezoelectric or electrostatic effects to drive the surrounding air to make sound. The speaker is the terminal of the whole sound system.

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