Terminology spectrum, spectrogram, spectrograph, sonogram, etc

1. What is spectrum and spectrogram?
2. What is the difference between spectrogram and spectrograph?
3. What are the three dimensions of a spectrogram?
4. How many types of spectrograms are there?

What is spectrum and spectrogram?

A spectrogram gives a running display of a sound signal as it occurs in real time; a spectrum, on the other hand, gives us a snapshot of the sound at a specific point in time. A spectrum can enable you to see, for example, the energy distribution over the different frequencies of a single vowel, like [i].

What is the difference between spectrogram and spectrograph?

Spectrograph. A SOUND ANALYSER with graphic output showing the SPECTRUM or frequency content of a sound and its variation in time. It is commonly used for speech analysis, and is sometimes called a sonagraph or visible speech. The graphic output is called a spectrogram or sonagram.

What are the three dimensions of a spectrogram?

A common format is a graph with two geometric dimensions: one axis represents time, and the other axis represents frequency; a third dimension indicating the amplitude of a particular frequency at a particular time is represented by the intensity or color of each point in the image.

How many types of spectrograms are there?

There are two main types of spectrograms – the discontinuous type, and the continuous type.