Sound — Core Learning Objectives
Note
- Describe the production of sound by vibrating sources
- Describe the longitudinal nature of sound waves
- State the approximate range of frequencies audible to humans as 20 Hz to 20000 Hz
- Know that a medium is needed to transmit sound waves
- Know that the speed of sound in air is approximately 330-350 m/s
- Describe a method involving a measurement of distance and time for determining the speed of sound in air
- Describe how changes in amplitude and frequency affect the loudness and pitch of sound waves
- Describe an echo as the reflection of sound waves
- Define ultrasound as sound with a frequency higher than 20 kHz
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