spectrogram

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spectrogram

[′spek·trə‚gram]
(spectroscopy)
The record of a spectrum produced by a spectrograph. Also known as measured spectrum.
References in periodicals archive ?
After transforming the signal to time-frequency domain, as defined in (1) and (2), we plotted spectrograms of each channel, representing power density of signal using logarithmic normalization which gave us graphical representation as shown in Fig.
Dyes for color mixtures in the range from 400 to 900 nm have been studied through spectrograms. The analysis has introduced us to the field of 'twin dyes'.
In order to exclude the random component, it is necessary to use the smoothing of the spectrograms both along the time and frequency axis.
The features list includes the zero-crossing rate, the pitch, the bandwidth, the MFCCs, the spectrogram coefficients, and a variety of complexity measures including the Shannon, Tsallis, wavelet, and permutation entropies.
Given that male calls typically range from 140 to 700 ms in duration, a series of 6 consecutive 100-ms spectra provides an approximate spectrogram of each male call detected.
In order to identify the frequency range(s) of elevated broadband noise, spectrograms are presented in Fig.
Full-spectrum bat calls were viewed using Kaleidoscope software version 3.1.7 (2016), and acoustic measurements were obtained from zero-crossings spectrograms on the same software.
Spectrograms. Retrieved March 30, 2016, from http://www.let.uu.nl/uilots/lab/courseware/phone tics/spectrogram/spectrogram.html.
The sleep EEG can be analyzed in several ways: (i) the time domain (e.g., period-amplitude analysis), which provides information about the incidence and amplitude of waves [2, 3]; (ii) the frequency domain (e.g., spectral analysis), which decomposes signals into constituting frequency components; or (iii) time-frequency analysis methods (e.g., spectrograms, wavelet analysis, and matching pursuit), which combine elements of both domains [4].
Moreover, the spectrograms of the corresponding waveform are shown in the Appendix.
Caption: FIGURE 7: Spectrograms of [alpha]-filtered signal (a) and SK-filtered signal (b).