Signals Flashcards
1
Q
Advantage of using digital rather than analogue signals
A
- interference can be removed
- can be reproduced exactly
- clearer
2
Q
Everyday uses of digital signal
A
- TV digital reception
* digital radio
3
Q
Why do different frequencies require different sizes of loudspeakers
A
- waves spread out as they leave speaker
- different frequencies have different wavelengths
- diffract most of speaker size matches wavelength
- giving a more even sound
