Creating a maximum seal around an existing wooden door

*Please move to the suitable forum area if studio design is not the right place for this post. I mix and record in a 4.2X3.8X2.4M acousticly treated room which is part of a 3 room single floor appartment. The walls are made of 100mm thick concrete. Noise floor within the room is within decent figures and almost inaudiable to my ears, outside street noise is minimum. Mechanical noises (computer fans) are eliminated. Sound which is coming into the room from the kitchen and living room is entering the room and is leaking into Mic recordings,this is very noticable during quiet passes or when an instrument is played softly. The sound is mainy speech hense no lower then 1000hz. I have targeted the problem to the room enterance door, This is a 42mm thick solid wood door fitted with a 100mm acoustic panel covering most of it (as the door is on first reflection point). The main problem are cracks between the door surroundings and the doorpost and also the floor-door area. A new acoustic door,commerical or DIY is out of the question since I dont have the budget for it. Im willing to spare the maximum of 300$ for the door seals but would like to spend lease as possible. I have found the following products available locally: Door-floor seal : http://www.absotec.co.il/images_product/guiliotina.mht Its an aluminium device which is screwed to the outside of the door with a screw which is pushed agaist the post on closure which loweres a foam. Door-door post seals: http://www.absotec.co.il/images_product/atamim(1).pdf Note page 2 of pdf. On the more lowered end there is this expanding foam strips http://www.absotec.co.il/images_product ... %20bg1.pdf Im not sure they can witstand repeative door opening\closing. Any advice and ideas are welcomed. Thanks, Tomer.

You may also want to remove the door trim from one side of the frame. This will allow you to see if there are voids in between the framing and the door jamb that require filling. Typical insulation can be placed into this area, not too tight, but a complete fill.