Volume increase of a magnitude spectrogram

1. What is a magnitude spectrogram?
2. Does a spectrogram show amplitude?
3. How do you Analyse a spectrogram?
4. What do harmonics look like on a spectrogram?

What is a magnitude spectrogram?

The log-magnitude spectrogram is defined as the logarithmically scaled magnitude spectrum of a signal across time. The advantage of the log-magnitude spectrogram is that it shows how the energy distribution evolves. The disadvantage is that it represents only magnitude information.

Does a spectrogram show amplitude?

The spectrogram allows you to visualize both frequency and amplitude information of an audio recording in one display.

How do you Analyse a spectrogram?

In the spectrogram view, the vertical axis displays frequency in Hertz, the horizontal axis represents time (just like the waveform display), and amplitude is represented by brightness. The black background is silence, while the bright orange curve is the sine wave moving up in pitch.

What do harmonics look like on a spectrogram?

In the spectrogram, the harmonics appear as horizontal lines - they have constant frequency. The power of each harmonic increases with time, so the sound becomes louder. The higher harmonics increase more than do the lower, which makes the timbre 'brassier' or brighter, and also makes it louder.