 Visual representation of the spectrum of frequencies of a signal as it varies with time |
A spectrogram is a visual representation of the 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 they may be called waterfall displays.
For the scientific instrument, see Optical spectrograph.
Spectrograms are used extensively in the fields of music, linguistics, sonar, , , , , and others. Spectrograms of audio can be used to identify spoken words , and to analyse the .
