Lesson 8 — Pitch and frequency — Online

Pitch

and

Frequency

1 / 26

Slide 1: Slide

Natuurkunde / ScheikundeMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 26 slides, with text slides.

Items in this lesson

Pitch

and

Frequency

Slide 1 - Slide

Lesson plan

Quick recap
paragraph 5.5
Checking the homework

Slide 2 - Slide

Learning goals

Describe the link between pitch and frequency

Know the range of hearing of humans and of other animals

Know what is meant by ultrasound

Explain why music instruments have distinct sounds

Slide 3 - Slide

Recap

Slide 4 - Slide

Wavelength
Amplitude
Frequency

Slide 5 - Slide

Wavelength

The length of a wave (in cm, m, km)

Amplitude

The distance from the center of the wave to the highest or lowest point (in cm, m, km)

Frequency

The amount of waves per second (in hertz, Hz)

Slide 6 - Slide

One block is 2 cm long

wavelength

8 cm

Amplitude

2 cm

Frequency

2 Hz

This snapshots has a duration of 1 second

Slide 7 - Slide

One block is 2 cm long

wavelength

8 cm

Amplitude

2 cm

Frequency

2 Hz

This snapshots a duration of 1 second

This snapshots has a duration of 1 second

Slide 8 - Slide

(in cm, m, km)

One block is 2 cm long

wavelength

8 cm

Amplitude

2 cm

Frequency

2 Hz

This snapshots a duration of 1 second

This snapshots has a duration of 1 second

Slide 9 - Slide

One block is 2 cm long

wavelength

8 cm

Amplitude

2 cm

Frequency

2 Hz

This snapshots a duration of 1 second

2 Waves per second

This snapshots has a duration of 1 second

Slide 10 - Slide

An oscilloscope

Link

Slide 11 - Slide

Amplification

The Amplitude of a wave...

...Determines the loudness of a sound

Slide 12 - Slide

Pitch & frequency

Slide 13 - Slide

Tone generator

Slide 14 - Slide

The loudness of a sound is determined by its amplitude

Slide 15 - Slide

The pitch of a sound is determined by its frequency

Slide 16 - Slide

Pitch & frequency

Frequency: the amount of waves per second

Expressed in: Hertz (Hz)

High frequency— high pitch

Low frequency — low pitch

Slide 17 - Slide

Which wave will create a higher pitch?

Slide 18 - Slide

Pitch & frequency

High frequency sound — short wavelength
Low frequency sound — long wavelength
The Frequency of a sound wave (pitch) does not affect the amplitude (loudness) of a sound wave.

Slide 19 - Slide

Frequency

Amplitude

Pitch

Loudness

Slide 20 - Slide

The audible range

20 Hz

20.000 Hz

Tone generator

Slide 21 - Slide

The audible range

20 Hz

20.000 Hz

All sound frequencies above 20.000 Hz are called Ultrasound

All sound frequencies below 20 Hz are called Subsound

Slide 22 - Slide

Hearing in Animals

Slide 23 - Slide

The sound of music

Slide 24 - Slide

Homework

5.6 workbook exercies

Slide 25 - Slide

Learning goals

Describe the link between pitch and frequency

Know the range of hearing of humans and of other animals

Know what is meant by ultrasound

Explain why music instruments have distinct sounds

Slide 26 - Slide