ceiling reflection problem

salam , im from Bangladesh, i previously posted at "small studio in Dhaka" . after completion of my ceiling and padding the side walls with glass-wool, there is a fast group of repeat sound if i clap at the live room.which wasn't like this just before putting the glass-wool on the sidewall studs. now....there is a gypsum board kept lying on the floor, if i stand over it and clap the repeat sound reduces most of it...is it normal?.............the floor will be laminated with wooden floor according to the advice from this forum now...it is just concrete floor.....so...what should i so about it?

You need a ceiling cloud! It sounds like you have the problem called "flutter echo", and since I don't see any treatment on the ceiling, I believe that you are getting this problem vertically, between ceiling and floor. Search the forum for "ceiling cloud" for ideas on how to do that.

salam , thanx man ......i thought the cloud is only needed for control room.......:)

sakam , i have searched and get a lot of help....im thinking making clouds by mdf is it alright?

salam , can i use cotton canvas cloth under the ceiling gypsum?