PLEASE HELP!

[cliamteboy]

The people I am interviewing have started to hear feedback when I talk to them (3 different interviews) 

You can hear it at 10:19. 

https://www.youtube.com/watch?v=JL_TlEFynoE&t=617s 

I really need this to work properly for tomorrow and I don't have time to buy a new computer. Please help!