Let me add my paltry understanding. An audio signal is an electrical signal that replicates a sound wave. The electrical voltage varies in the same way as the sound pressure (wave) that it represents varies. Both in strength and frequency. The varying ac voltage is created by various mechanical to electrical transducers - initially a microphone. Later in the stream, perhaps a phono cartridge. To “transmit” the audio signal, a wire is most often used. The actual transfer mechanism is a transfer of electrical charge within the wire. This is called elecrical current. The speed is irrelevant, since it can transverse your room in a tiny fraction of a second.
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- 153 posts total
- 153 posts total