In this laboratory, you will analyze a variety of sound recordings. Each recording contains a single spoken word, featuring a single vowel sound. For each sound, you will use provided third-octave filter bank software to visualize the different sounds.
> x1 = wavread('vowel1.wav');
> play_sound(x1);Can you identify the vowel sound? To learn about the technical terminology used to describe various vowel sounds, visit the following online article: http://en.wikipedia.org/wiki/Vowel. What is the technical term and symbol for this vowel sound?
> third_octave_analysis(x1);On the plot, the -axis shows the time in seconds, and the -axis shows a third-octave band index , where , where is defined as in Equation (3). In other words, corresponds to a frequency of 1 kHz. The orange-red colors on the plot indicate areas of high energy, whereas the blue-dark colors on the plot indicate areas of low energy. Which frequency index shows approximately the darkest red patch in the middle of the recording?
> x2 = wavread('vowel2.wav');Again, you can play this second recording using the play_sound() command:
> play_sound(x2);What is the technical term and symbol for this vowel?
> third_octave_analysis(x2);In this plot, you should notice a different pattern of orange-red patches. How does this pattern differ from the previous pattern? Do you think you could tell the vowels apart by looking only at the pictures?3