# Lesson 8 — Pitch and frequency — Original

Pitch
and
Frequency
1 / 20
Slide 1: Tekstslide
Natuurkunde / ScheikundeMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 20 slides, met tekstslides.

## Onderdelen in deze les

Pitch
and
Frequency

#### Slide 1 -Tekstslide

Lesson plan
• Quick recap
• paragraph 5.5
• Checking the homework

#### Slide 2 -Tekstslide

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

Recap

• Wavelength
• Amplitude
• Frequency

#### Slide 5 -Tekstslide

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)

An oscilloscope

#### Slide 7 -Tekstslide

Amplification
The Amplitude of a wave...
...Determines the loudness of a sound

#### Slide 8 -Tekstslide

Pitch & frequency

#### Slide 9 -Tekstslide

Pitch & frequency
• Frequency: the amount of waves per second (waves/second)
• Expressed in: Hertz (Hz), kilohertz (kHz)
• High frequency sound — high pitch
• Low frequency sound — low pitch

#### Slide 10 -Tekstslide

Which wave will create a higher pitch?

#### Slide 11 -Tekstslide

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.

Frequency

Amplitude
Pitch

Loudness

#### Slide 13 -Tekstslide

The audible range
20 Hz
20.000 Hz

#### Slide 14 -Tekstslide

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 15 -Tekstslide

Hearing in Animals

#### Slide 16 -Tekstslide

The sound of music

#### Slide 17 -Tekstslide

Working independently
Do: The worksheet exercises

#### Slide 18 -Tekstslide

Next lesson — Homework check
• Workbook exercises 5.1
• Yellow block exercises 5.2
• Workbook exercise 5.2
• Yellow block exercises 5.3
• Workbook exercises 5.4
• The decibel worksheet
• The worksheet exercises

#### Slide 19 -Tekstslide

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