Whatever happened to those weird noises affecting nearby speakers when we received a call on a cell phone back in the days, as illustrated in the link?

Question

https://streamable.com/yerb9

I was appreciating the nice little attention to that detail in gta4, but it got me wondering how come it’s gone nowadays.

In: Engineering

Answer 1

Microphones do this that are not connected to speakers (monitored with headphones). Leads me to believe it’s the input device catching signals, not the output.

Source: I own a recording studio.