I use a electric guitar but the problem occurs when i don't use the amp. it sounds like the string is vibrating on metal or something. I am using "super Slinky" guitar strings so the lower E is a very loose string and makes the most buzzing. if i tighten the string to a higher octive the string becomes almost too tight and makes a high pitch noise. I belive it is nothing to do with the strings or tuning. it is also nothing to do with my playing as it doesnt happen on high notes (lower frets) and it still happens on a open string.
If you can tell me what the problem is/how to fix this and a rough cost then you'd be a great help
I my guitar was re stringed and there was no difference and my guitar is tuned corectly - its nothing to do with my skill either as it buzzes on open string

I just relised it does happen on the Higher notes (lower frets) but only when i strum fairly hard