Spectrogram, Spectral analysis and Wavelet analysis

DataView has time-frequency analysis facilities, including:

Sonogram

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.

Spectral analysis

Standard stationary spectral analysis can be accomplished by selecting a time-slice through the sonogram.

Wavelet Analysis

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.