You should not hear an echo when using a computer with a built-in microphone.  However, if you do hear an echo, use a headset or ear buds with your computer to eliminate the echo you hear.

For Workshops with multiple Students, the best way to solve the problem during a Workshop session is for the Instructor to mute the Student by clicking the microphone icon next to the Student’s name.  In the future, it’s best to ask all Students to use a headset to ensure no background noise or echo.