New
New
Year 4

Changing the pitch of sounds

I can find patterns between the pitch of a sound and the length of the vibrating object.

New
New
Year 4

Changing the pitch of sounds

I can find patterns between the pitch of a sound and the length of the vibrating object.

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Lesson details

Key learning points

  1. Pitch describes how low or high a sound is, and can be measured using a sound meter to detect pitch.
  2. The unit for measuring pitch is hertz (Hz).
  3. Scientists look for patterns in sets of results to tell them how one thing affects another thing.
  4. Changing the length of the vibrating object can affect the pitch of the sound it produces.

Keywords

  • Pitch - Pitch is a measure of how high or how low a sound is.

  • Pattern - A pattern is a series of data that repeats in a recognisable way.

  • Affect - Affect is the change that occurs between two things that we can observe.

  • Results - The results of a test or enquiry is what happened or what was found out.

  • Vibrating - Vibrating is when an object moves very fast from side to side.

Common misconception

Children may think that the volume of sound and the pitch of sound is the same thing, or that high sounds are loud and low sounds are quiet.

It is important to expose children to a wide range of high and low pitched sounds. Continue to make the distinction between volume and pitch throughout this lesson.

Sound meters that detect pitch of sounds, such as Google Science Journal, can be downloaded for free to use on tablets and other electronic devices. When blowing across straws to make different pitched sounds, use wide straws, such as for milkshake or bubble tea.
Teacher tip

Equipment

See additional materials for further guidance.

Content guidance

  • Exploration of objects

Supervision

Adult supervision recommended

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
Which of the following produce sounds?
Correct answer: a person speaking
an untouched pillow on a bed
Correct answer: a person jumping in a puddle
Q2.
How do our ears help us to hear sounds?
An image in a quiz
They are near the sound so they just hear it.
Correct answer: Our ear drum vibrates allowing us to hear sounds.
Our ear lobes vibrate so that we can hear sounds.
Q3.
How do sounds travel through different mediums such as liquids, solids and gases?
We carry the sounds attached to our ears.
Correct answer: Vibrations travel in sound waves.
Sounds push through tiny holes in different mediums.
Q4.
How can using a sound sensor help people to understand noise pollution?
Correct answer: It can help to monitor how loud an environment is and make it safer.
It can help people to learn to measure in decibels.
It can help people to know what different sounds are.
Q5.
The away a sound is, the quieter it will be heard.
Correct Answer: further, farther
Q6.
Which of the following materials are good sound insulators for a bedroom?
An image in a quiz
metal
Correct answer: wool
Correct answer: cardboard
Q1 image 1 Raymond Antrobus by Robert Sharp, English PEN CC BY-NC-SA 2.0 Q2 File:Anatomy of the Human Ear blank.svg" Chittka L, Brockmann derivative work: M Komorniczak. licensed under CC BY 2.5. https://creativecommons.org/licenses/by/2.5/deed.en

6 Questions

Q1.
What does pitch tell us about a sound?
Correct answer: how high or low the sound is
how loud or quiet the sound is
how far the sound travels
Q2.
How can scientists measure pitch?
Correct answer: using a sound sensor to detect pitch
using their ears to detect pitch
using a tape measure to measure pitch
using a stop watch to measure pitch
Q3.
Scientists look for in results to tell them how one thing affects another thing.
Correct Answer: patterns, a pattern
Q4.
What happens to the pitch of a straw if you cut it shorter and blow over the top?
An image in a quiz
it creates a lower pitch
Correct answer: it creates a higher pitch
it stays the same pitch
Q5.
What is the unit of measurement for pitch?
Correct Answer: hertz, Hertz, Hz
Q6.
Which statement below do you agree with?
Correct answer: Thunder produces a low pitched sound.
A flute can only produced low pitched sounds.
The sound made by a squeaky door does not have a pitch.

Additional material

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