Difference between revisions of "Analog audio"
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The term <nowiki>Analog audio</nowiki> is typically used in contrast to [[digital audio]]. Strictly speaking; audio is used to describe things having to do with sound. | The term <nowiki>Analog audio</nowiki> is typically used in contrast to [[digital audio]]. Strictly speaking; audio is used to describe things having to do with sound. | ||
| − | Sound is short-term variations in air pressure above | + | Sound is short-term variations in air pressure above and below average (barametric) air pressure. These pressure variations are translated by a transducer such as a microphone into voltage variations for transmission or reproduction via another transducer (speaker) after amplification. The voltage variations change proportionally to the air pressure variations, so one can say the voltage variations are analogous to the sound- or that the voltage waveform is an "analog" of the acoustic waveform of the pressure variations. |
| − | In a similar manner, analog magnetic tape recording utilizes variations in the strength of the magnetic field down the length of the tape to make | + | In a similar manner, analog magnetic tape recording utilizes variations in the strength of the magnetic field down the length of the tape to make an analog recordings. Vinyl records are engravings of the waveform in the physical medium of the disk. The variations of the groove walls are analogous to the sound pressure variations. |
[[Category:Terminology]] | [[Category:Terminology]] | ||
Revision as of 10:55, 21 May 2014
The term Analog audio is typically used in contrast to digital audio. Strictly speaking; audio is used to describe things having to do with sound.
Sound is short-term variations in air pressure above and below average (barametric) air pressure. These pressure variations are translated by a transducer such as a microphone into voltage variations for transmission or reproduction via another transducer (speaker) after amplification. The voltage variations change proportionally to the air pressure variations, so one can say the voltage variations are analogous to the sound- or that the voltage waveform is an "analog" of the acoustic waveform of the pressure variations.
In a similar manner, analog magnetic tape recording utilizes variations in the strength of the magnetic field down the length of the tape to make an analog recordings. Vinyl records are engravings of the waveform in the physical medium of the disk. The variations of the groove walls are analogous to the sound pressure variations.