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Citation bot (talk | contribs) Add: doi-access, doi, page, issue, volume. Removed proxy/dead URL that duplicated identifier. | Use this bot. Report bugs. | Suggested by Headbomb | Linked from Wikipedia:WikiProject_Academic_Journals/Journals_cited_by_Wikipedia/Sandbox | #UCB_webform_linked 833/970 |
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{{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. The legend to the right shows that the color intensity increases with the density.]]
[[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]]
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