|
Sponsored Links
Sound recording and reproduction is the electrical or mechanical inscription and re-creation of sound waves, usually used for the voice or for music. The two main classes of sound recording technology are analog recording and digital recording. Analog recording is achieved by a small microphone diaphragm that can detect changes in atmospheric pressure (acoustic sound waves) and record them as graphic sound waves on a medium. The first of these recordings were called sonograms and had no playback mechanism available. With an exclusively mechanical phonograph, the analog conversion is in the form of sonogram grooves carved by a stylus. Newer phonographs use electronics in the process. With magnetic tape, the analog conversion is first in the form of electrical current waves from the microphones conversion of diaphragm movement to electromagnetic fluctuation (flux) that modulate an electric signal, and second of magnetic particles drawn into sonogram-shaped clusters by flux from a tape head sensing the electrical current changes. Analog sound reproduction is the reverse process with a bigger loudspeaker diaphragm causing changes to atmospheric pressure to form acoustic sound waves. Digital recording and reproduction uses the same analog technologies, with digitization of the sonographic data and signal, allowing it to be stored and transmitted on a wider variety of media. The digital binary numeric data is a representation of the periodic vector points in the raw analog acoustic data at a sample rate most often too frequent for the human ear to distinguish differences in quality. Digital recordings are not necessarily at a higher sample rate, but are often considered higher quality because of less interference from dust or electromagnetic interference in playback and less mechanical deterioration from corrosion or mishandling the storage medium.
|
Sound Reproduction Subcategories
Sound Reproduction Articles
|
| 
