What can i find in a spectrogram?

A spectrogram is a visual way of representing the signal strength, or “loudness”, of a signal over time at various frequencies present in a particular waveform. Not only can one see whether there is more or less energy at, for example, 2 Hz vs 10 Hz, but one can also see how energy levels vary over time.

1. What is shown in the graph of a spectrogram?
2. What does a spectrogram show sound?
3. What does spectrogram plot?

What is shown in the graph of a spectrogram?

A spectrogram displays the strength of a signal over time at a waveform's various frequencies. Spectrograms can be two-dimensional graphs with a third variable represented by colors or three-dimensional graphs with a fourth color variable.

What does a spectrogram show sound?

Spectrograms map out sound in a similar way to a musical score, only mapping frequency rather than musical notes. Seeing frequency energy distributed over time in this way allows us to clearly distinguish each of the sound elements in a recording, and their harmonic structure.

What does spectrogram plot?

A spectrogram plots time in Y-axis and frequencies in X-axis.