From the course: Digital Audio Foundations
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Getting sound back to the acoustic domain
From the course: Digital Audio Foundations
Getting sound back to the acoustic domain
- We're almost done with our tour through the analog signal path. The last step is to bring the sound back into the acoustic domain so people can hear it. To do this, we need another transducer, a loudspeaker. Most loudspeakers work exactly like a dynamic microphone in reverse. The signal runs through a large coil of wire, creating magnetism that pushes and pulls a paper cone. That's why speaker level is such high voltage. We need that much electricity to produce enough magnetism to move the mass of the speaker. Speakers come in all kinds of shapes and sizes, and there's a lot of science behind what makes a speaker well or poorly suited for a particular purpose. The physical properties of the transducer determine the tone of the sound that it makes. As one example, large speakers are better suited to playing back low bass sounds, and small speakers are better suited for playing back high sounds just like large musical instruments are better for playing low sounds and small instruments…
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