Why did speakers used to make a strange noise when a phone is about to receive a message? Also, why that doesn’t happen as often now (little to no instances)?
In: 1651
Your phone sends out radio waves like a radio station and your wires are acting like an antenna as everyone is saying.
A big reason you don’t hear it anymore is because of shielding like people say and different frequencies, but the major reason you probably don’t notice is that most speakers nowadays have cables that are sending a digital signal. Sending 0’s and 1’s where your minor interference via radio signals gets filtered out.
When a signal is analog the extremely small amount of interference becomes audible
I normally have a USB cable that sends a digital signal to a sound system, I had to switch to using 3.5mm (aux) output for my PC and that cable has a ton of interference with my phone, which gets amplified before being sent to my headphones. The USB digital signal doesn’t have this issue.
TL;DR
The same way your TV doesn’t go out during a snowstorm anymore, technology has changed and interference like that isn’t an issue for modern methods of transmitting data.
Latest Answers