Spectrogram, Spectral analysis and Wavelet analysis
DataView has time-frequency analysis facilities, including:
Short-term Fourier transforms allows examination of the time-varying frequency
components in a signal. Averaging increases the accuracy of the power measurement
of each frequency bin, while partial segment overlapping increases the time
resolution of the analysis.
Standard stationary spectral analysis can be accomplished by selecting a time-slice
through the sonogram.
DataView can analyse waveforms using the discrete wavelet transform (DWT), which in some ways is similar to the short-term Fourier transform.
The end result is a 2D "map" showing the relative energy at specific frequencies over the duration of the data.
The higher the frequency, the more fine-grained the time resolution of the analysis.