How do telephones work? Watch
1) They send sound down a wire in real time
2) it ACTUALLY SOUNDS LIKE THE PERSON WHO IS SPEAKING
... magic ...
© Copyright The Student Room 2017 all rights reserved
The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.
Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE