Science at key stage 3 (Year 8)
Unit 8L: Sound and hearing
Section 6: a. How do we hear sounds?
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Objectives |
| Children should learn: |
- that different people can hear different ranges of pitch
- that hearing changes with age
- that some animals detect sounds that are inaudible to human ears
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Activities |
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Outcomes |
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Children: |
- Use an audio signal generator to generate a range of sounds of different pitch. Ask pupils to indicate when they can no longer hear the sound. Tell pupils about the range you can hear and ask why the teacher's range of hearing is often more limited than that of pupils.
- Ask pupils what they know about the hearing range of animals and discuss how different animals use sound,
eg long-distance communication in whales, ultrasonic echo location in bats, communication using whistles with dogs.
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- describe how hearing ability changes with age and that hearing can be damaged
- describe examples of animals detecting sounds that are inaudible to human ears
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Points to note |
- Sensitivity is needed in talking about hearing impairment. There is an opportunity for a visit by an outside speaker concerned with the issues and problems faced by hearing-impaired people.
- The range of hearing for an adult is typically from 20Hz to 20,000Hz, but pupils may hear as high as 30,000Hz.
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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