Understanding the frequency scale of a spectrogram

1. How do you read a frequency spectrogram?
2. How do you interpret frequency-domain?
3. How do you describe a frequency spectrum?
4. What does intensity mean on a spectrogram?

How do you read a frequency spectrogram?

The spectrogram is "read" from top to bottom (this is the direction that time increases). Each horizontal line represents in color the amount of ground motion at frequencies ranging from 0 to 10 Hz. Each horizontal line represents the frequency spectrum for 1 minute of data.

How do you interpret frequency-domain?

The Frequency Domain refers to the analytic space in which mathematical functions or signals are conveyed in terms of frequency, rather than time. For example, where a time-domain graph may display changes over time, a frequency-domain graph displays how much of the signal is present among each given frequency band.

How do you describe a frequency spectrum?

Definition of 'frequency spectrum'

The frequency spectrum of an electrical signal is the distribution of the amplitudes and phases of each frequency component against frequency.

What does intensity mean on a spectrogram?

A spectrogram is a graphic representation of the components (harmonics or formants) of a sound as they vary in frequency and intensity over time. Frequency is shown on the vertical axis; time is shown on the horizontal axis, and intensity as relative darkness of the image.