3.4 Sound
- Syllabus
- 0625–2026–2027
- Topic
- 3.4
- Level
- —
3.4.1—Production of sound by vibrating
- Describe the production of sound by vibrating sources
3.4.2—Longitudinal nature of sound waves
- Describe the longitudinal nature of sound waves
3.4.3—Approximate range of frequencies
- State the approximate range of frequencies audible to humans as 20 Hz to 20 000 Hz
3.4.4—A medium is needed to transmit sound
- Know: a medium is needed to transmit sound waves
3.4.5—Speed of sound in air is approximately
- Know: the speed of sound in air is approximately 330–350 m/s
3.4.6—Method involving a measurement of
- Describe a method involving a measurement of distance and time for determining the speed of sound in air
3.4.7—Changes in amplitude and frequency
- Describe how changes in amplitude and frequency affect the loudness and pitch of sound waves
3.4.8—An echo as the reflection of sound
- Describe an echo as the reflection of sound waves
3.4.9—Ultrasound as sound with a frequency
- Define ultrasound as sound with a frequency higher than 20 kHz
3.4.10—Compression and rarefaction
- Describe compression and rarefaction
3.4.11—That, in general, sound travels faster
- Know that, in general, sound travels faster in solids than in liquids and faster in liquids than in gases
3.4.12—Uses of ultrasound in non- destructive
- Describe the uses of ultrasound in non- destructive testing of materials, medical scanning of soft tissue and sonar including calculation of depth or distance from time and wave speed
Objective notes
12 learning objectivesConceptIGCSE Physics