How to make room sound proof?

Guys, meron na ba kayong experience or naging project na ginawang sound proof ang isang room? We have this small office renovation project somewhere in Makati. One of their request is to make the Office of the President totally sound proof. Right now kasi meron storage room between the staff and the office of the president. But still naririnig pa rin daw nila voice ng President nila kapag may pinapagalitan or sobrang saya. Malakas talaga boses ng boss nila. Puro drywall lang kasi partitions nila at hindi chb wall.

Sabi ko is we will put another drywall pero I don't know if it will be effective lalo na kung tatangalin yung storage room I need your help kung meron kayong alam na material na pwedeng i-insert sa dry wall to make it sound proof. meron akong nabasa sa isang forum na to use "dense fiber boards".

try mu ang sandwich wood foam sir.

http://www.cgpinoy.org/t24785-architectural-noise-sound-reduction?highlight=sound

aesonck wrote:try mu ang sandwich wood foam sir.

http://www.cgpinoy.org/t24785-architectural-noise-sound-reduction?highlight=sound

I agree about this one. ganito sa office namin and effective

Yup, something na foam base partition bro.

also, consider mo din ang aircon ducting. dun minsan dumadaan.

saka walang effect itong storage, yung right side may pinto at single drywall lang. im pretty sure dun dadaan ang sound.

nakapag inquire na ako sa mga supplier namin ng boards, meron silang high dense board, sabi nila pwedeng pang sound proof daw. Meron din akong nakit a sa internet na gypsum board for sound proofing pero wala ata dito sa pinas,

@bokks - centralized aircon nga yung office so baka possible nga, tapos yung storage existing kasi yan tapos tatanggalin. yung sa door naman balak ko na lagyan ng secret door since lalagyan naman namin ulit ng drywall.

Hindi ba ito yung sinasagad lang ang dry wall from floor to slab? "Gypsum baffle". May nag product demo na samin ng mga sound proofing materials - may kamahalan lang talaga tapos di pa ready available, mahaba lead time. Usually imported. Try ko post yung supplier na yun pag nahanap ko yung calling card na binigay nila.