A micro-bat communicates and echolocates by emitting short sound pulses in the frequency range 12–28 kHz12\text{--}28\text{ kHz}12–28 kHz.
State the value of the speed of sound in air and state how the speed of sound in a solid (such as iron) differs from the speed of sound in air.
State and explain whether humans with normal hearing can hear all the sound frequencies emitted by this micro-bat.
Complete the table to describe the differences in loudness and pitch of two different bat sounds.
| Frequency / kHz\text{kHz}kHz | Amplitude | Loudness | Pitch |
|---|---|---|---|
| 25 | small | ||
| 13 | large |
Complete the sentences to describe how sound is transmitted through air.
Sound waves travel through air as longitudinal waves. They are made of vibrating __________ which produce compressions and rarefactions. A compression is a region of __________ and a rarefaction is a region of __________. The particles vibrate __________ to the direction of energy transfer.
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.