Let’s take a look at the characteristics of the sound “a” (spoken like in father). Here is a screenshot of Audacity which shows the repetitive pattern of the sound “a”:
I have marked the different waves with numbers 1, 2, 3, 4, 5. The waves with the same number are slightly different one from another, but they are similar. It is a repetitive pattern. Let’s extract a complete frame of the sound “a”:
The above picture shows the first frame. Let’s compare the first frame with the second frame:
Take a look at the yellow marked area, and compare it with the corresponding area of the previous picture. It is slightly diffent.
This was a short introduction into signal processing. These sound waves can be analysed by software like the HTK toolkit.
