You can use a Sound Buffer to help keep intrusive noise off your calls.
I work at home, on the telephone and I need to prevent background noise from getting into my phone calls. While I’ve found a fan even out background noise, I just purchased a great device that works so much better than a simple fan! Check out the LectroFan from my (affiliate) link -HERE-
1. Masks the background noise for my phone calls
2. Also evens out the background sounds that distract Me
3. Help me sleep. After testing it in the bedroom I bought two more. You get a lot of value for $50!