Visualizing Your Own Speech - the Spectrogram

We've learned so far that speech sounds are made up of different frequencies. A spectrogram is one way to visualize the frequency content of a sound. Try speaking into your computer's microphone to see what your own speech looks like below. Frequencies (along the vertical axis) are colored depending on their intensity.

Adjust the sensitivity a bit. Try speaking slowly (your ears are much faster than your eyes, so if you want to be able to "see" what's going on in sound you often have to slow it down). Try a few vowels: "aaaah iiiih oooh eeeeh". You may also want to try singing a vowel at different pitches.

Can you work out what "aaahs" at different pitches have in common? And what distinguishes "aaahs" from "uuuuhs"?