Page 26 - Vibrations

You are able to observe any trend as the spectral

lines moving. Another interesting feature is the

spectrogram.

A signal is split into short segments and a spectrum

is generated from each segment.

The new spectral segments are laid down side by

side.

The y direction represents the frequency range and

x direction the time direction.

The magnitude of the spectrum is represented as

different colours - red large magnitude, blue low.

Spectrogram of a sweep up and sweep down frequency

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