Content deleted Content added
No bare URLs. Remove Cleanup bare URLs template |
No edit summary Tags: Reverted Mobile edit Mobile web edit |
||
Line 2:
{{redirect|Sonograph|the musical recording|Sonograph (EP)}}
{{for|the scientific instrument|Optical spectrograph}}
[[Image:Spectrogram-19thC.png|thumb|400px|Spectrogram of the spoken words "nineteenth century". Frequencies are shown increasing up the vertical axis, and time on the horizontal axis.
[[File:3D battery charger RF spectrum over time.jpg|thumb|400px|A 3D spectrogram: The RF spectrum of a battery charger is shown over time]]
A '''spectrogram''' is a visual representation of the [[spectral density|spectrum]] of [[frequencies]] of a signal as it varies with time.
When applied to an [[audio signal]], spectrograms are sometimes called '''sonographs''', '''voiceprints''', or '''voicegrams'''. When the data are represented in a 3D plot
Spectrograms are used extensively in the fields of [[music]], [[linguistics]], [[sonar]], [[radar]], [[speech processing]],<ref>JL Flanagan, Speech Analysis, Synthesis and Perception, Springer- Verlag, New York, 1972</ref> [[seismology]], [[ornithology]], and others. Spectrograms of audio can be used to identify spoken words [[phonetics|phonetic]]ally, and to analyse the [[Animal communication|various calls of animals]].
| |||