Reference tone: Difference between revisions
m Stub-sorting. You can help! |
added sound of reference tone→In media |
||
| Line 2: | Line 2: | ||
==In media== |
==In media== |
||
The most common reference tone in [[audio engineering]] is |
The most common reference tone in [[audio engineering]] is a {{Audio|1000Hz.ogg|1000 Hz tone}} at 0[[Decibel|dB]]. It is meant to be used by audio engineers in order to adjust the playback equipment so that the accompanying [[Electronic media|media]] is at a comfortable volume for the audience. In [[video production]], this tone is usually accompanied by a [[test card]] so the video signal may be calibrated as well. This is also the tone commonly used to [[Censorship|censor]] obscene or sensitive audio content. |
||
Some audio engineering equipment offer an alternative tone at a different frequency for comfort, since the standard reference tone is jarring if heard continuously. In its place, a different signal level can be specified (i.e. -20dB). |
Some audio engineering equipment offer an alternative tone at a different frequency for comfort, since the standard reference tone is jarring if heard continuously. In its place, a different signal level can be specified (i.e. -20dB). |
||
Revision as of 22:16, 29 September 2008
A reference tone is a pure tone corresponding to a known frequency, and produced at a stable sound pressure level (volume), usually by specialized equipment.
In media
The most common reference tone in audio engineering is a at 0dB. It is meant to be used by audio engineers in order to adjust the playback equipment so that the accompanying media is at a comfortable volume for the audience. In video production, this tone is usually accompanied by a test card so the video signal may be calibrated as well. This is also the tone commonly used to censor obscene or sensitive audio content.
Some audio engineering equipment offer an alternative tone at a different frequency for comfort, since the standard reference tone is jarring if heard continuously. In its place, a different signal level can be specified (i.e. -20dB).
In music
Many electronic tuners used by musicians emit a tone of 440Hz, corresponding to a pitch of A above Middle C (A4). More sophisticated tuners offer a choice of other frequencies, alternative A tones to account for differences in temperament. Some specialized tuners offer pitches used commonly on a particular instrument (standard guitar tuning, fifth intervals for string instruments, the open tones for various brass instruments).