From the course: Digital Audio Foundations
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Getting sound into the analog domain
From the course: Digital Audio Foundations
Getting sound into the analog domain
- The device that turns a sound wave in the acoustic domain into an electrical current in the analog domain, or vice versa, is called a transducer. The name is easy to remember if you think of the words transform, and conduct. A transducer does both. It transforms the energy, and acts as a conductor from one domain to the next. One common transducer is a Dynamic microphone, which has a tiny diaphragm that sound waves can push back and forth. The diaphragm is connected to a small coil of wire that moves around a magnet. The magnetic field creates small amounts of electricity in the same pattern as the sound wave that move the diaphragm. Besides Dynamic, and other types of microphones, there are other transducers than can bring sound from the acoustic to the analog domain, like electric guitar pickups and piezoelectric elements that are commonly found on acoustic instruments like guitars and violins. While the mechanics are slightly different between these different types of…
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