Exactly no difference with a drum to those metal sheets, they have them at the back of the south stand l3 and it sounded good when I sat there but more needs be done as well to improve the atmosphere in generalcorrect, if used properly it keeps the pace right, hence at away games like Leicester when we bang the corrugated sheets at the back, the song carries on for a long time and the tempo is right. Other stadiums have metal sheets to bang on and it helps a hell of a lot, genuinely makes the singing carry on longer.
I think some fans against the drum picture a brass band or some guy at the front in full uniform.