how do microphones in a phone not pick up any audio that the speakers put out? if I put a call on speaker mode, how do people on the other end not hear themselves?

Question

how do microphones in a phone not pick up any audio that the speakers put out? if I put a call on speaker mode, how do people on the other end not hear themselves?

In: Technology

Answer 1

The correct answer is:

Acoustic Echo Cancellation or AEC.

The phone has 1 “channel” of AEC. This is the technology which “cancels out” the audio from the speaker.