@audio-nrg sorry shan If I took your time ,but I know about microphones and condenser and dynamic but my problem is not basic , my problem is not even that buzz sound , this is so different , this noise is not like that , it's like sometimes it makes sound like tlik or click or its like someone speak in radio while I am singing , or playing guitar , my sound card is always great and it gives me best sound I mean sometimes there is no noise , so clean , but sometimes this radio noise that I read about it in a site , it's coming to my mic , they said it comes from maybe ADSL Wireless or any radio station which send those noises , your mic will take them.