This is a non Yahoo! product and I personally didn’t try this program so if it sucks don’t blame me 
SoliCall has developed an innovative and original software that will help you reduce unwanted noises on your part during an online conversation. Ticking on your keyboard? The phone rings? Your kids play loudly in the other room and you just don’t want the other party to be continously disturbed by all these noises? SoliCall can help. Whether you use Skype, Yahoo Messenger or Google Talk, SoliCall will make you sound more professional and more discrete.
There are other direct advantages for our users. Enjoy and hear SoliCall’s abilities yourself by using our Screen Incoming Audio feature, which minimizes background noises coming from the other end of the line. In addition, you get an Automatic Recorder which allows you to record and save all of your conversations in one library.