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# What is the difference between vowel and consonant?

Niveau :

#### FizziQ

Using the practical case of the pronunciation of vowels, the student analyzes the harmonics created by our vocal apparatus, and deduces how it works.

## Détails de l'activité

1. Discover the different ways we pronounce vowels

2. In the Measurements menu select the Sound spectrum. The spectrum lets you know the frequencies that make up a sound

3. Sing the vowel -i- for several seconds and record the spectrum

4. Analyze the graph. What do you see? How many peaks appear on the graph? Can you find a mathematical relationship between the peak frequencies?

5. The lowest frequency peak is the fundamental frequency, the other peaks are the harmonics. What is the fundamental frequency and how many harmonics can you find?

6. Sing the vowel -o- and record the sound spectrum. What do you see? How many harmonics do you find? What is the difference with the -i-?

7. Repeat this experiment for the other vowels. Can you imagine groups of vowels that seem to create the same types of harmonics?

8. It is the cavities of your mouth that allow you to create more or less harmonics. Why do some vowels produce more harmonics than others?

9. Try singing the sound of a growling dog. What do you see?