When we are using python to process audio, we may find audio amplitude and power spectrogram, what are them and how to understand them? In this tutorial, we will introduce them to you.
Audio amplitude
Audio amplitude is easy to understand, it is:
The value of it will affect the loudness of an audio, the higher the louder.
In python, we can use librosa.amplitude_to_db() to convert amplitude to decibel (dB) units.
Audio Power Spectrogram
As to an audio, the value of power spectrogram = (amplitude)^2, which means the value of power spectrogram>=0.
In python, we also can use librosa.power_to_db() to convert a power spectrogram to decibel (dB) units.