1. Lesson Two: Pitch and frequency
Studio Magic
Lesson Two: Pitch and frequency

2. To understand frequency, pitch and wavelength.
Expected Learning:
To understand frequency, pitch and wavelength.

3. Key Words:
Waves
Pitch
Frequency
Wavelength

4. Frequency is measured in hertz (Hz).
The frequency of a sound is the number of vibrations per second.
Frequency is measured in hertz (Hz).
Explain SS

5. A high-pitched note has a high frequency
A high-pitched note has a high frequency. The frequency of top A is 880 Hz.
A low-pitched note has a low frequency.
The frequency of middle C is 262 Hz.
Explain

6. Task One:
Watch the video “How to make a tone in Audacity” in the lesson two materials
Create a :
Top A
Middle C
Experiment with very high pitched sounds – what is the highest frequency tone you can hear?

7. The wavelength of a wave is the distance between two peaks.
So this wave has a smaller wavelength ...
... than this one.
Explain SS

8. A question to ponder…
Do you think the Frequency and Wavelength of waves might be linked?
You might like to run the “sound_en.jar” simulation in the theory lesson two folder – as you make the frequency of a sound increase – what happens to the wavelength?

9. Task Two : Research Ultrasound : Find out what Ultrasound is.
In your book write down:
Two examples of how Humans use Ultrasound.
Two types of animals that use ultrasound, and how…

10. Test your Knowledge: True or False:
Wavelength is the speed at which waves travel.
Frequency is measured in Hertz.
Pitch is another word for frequency.

11. Test your Knowledge: Frequency is measured in : A) Metres
B) The number of vibrations per second
C) Pressure
D) Octaves