Selecting sound isolation
To work out my box-in-a-box I needed two types of materials: something “fluffy” for the walls, and something “strong” to carry the floor.
Reducing floor vibrations
Because our “music room” is on the first floor, I created a floor which is isolated from the real floor. To achieve this I needed a material which absorps vibrations and is strong enough to carry the weight of the floor and the drum.
To be able to distribute the weight, these sheets of foam where cut in pieces of ±170*125mm. With an additional piece of MDF enough height was created to fill the remaining area with sound isolation.
Sound isolation for the walls
I mailed with eco-logisch.nl to ask them which product would be the best fit to isolate a drum booth and they suggested to use something with enough thickness: Metisse of 5cm.
To make sure most of the sound is kept inside the booth, the new floor and walls don’t touch the outer floor and walls = box-in-a-box. By leaving the walls uncovered the isolation can absorb the sound and avoid reflections, thus also reducing the level.