Digital and analogue systems are used to process and transmit sound information.
Describe the difference between a digital signal and an analogue signal.
State one advantage of using digital signals rather than analogue signals.
A high-fidelity audio cabinet contains a small loudspeaker (tweeter) and a large loudspeaker (woofer) to cover the range of audible sound.
Explain, using ideas about wave diffraction, why different sizes of loudspeaker are required to ensure that sound of all frequencies spreads out evenly into the room.
30 exam-style questions on Edexcel IGCSE Physics Light and sound. Each one has a worked solution and a mark scheme showing where the marks go.