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Home Soundproof Garage - Garage Conversion Stage 3
Garage Conversion Stage 3

Stage 3 of Chris Whealy's Excellent Series

Soundproof Garage Conversion

 



Soundproof a Room Stage3 Part 3

Soundproof Garage fan install soundproof room ventilation airIsolate fan mounting

 

Unfortunately, I discovered (after the ceiling of the practice room had been put up), that the foam used to provide vibration insulation was too dense. A significant level of vibration was being transmitted into the frame of the room: so I had to think of an alternative solution.

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Soundproof a Room Stage3 Part 2

Soundproof Garage

The inline fan is a Vent Axia ACH-100 that has been mounted on a sheet of foam insulation sandwiched between two sheets of chipboard to provide some insulation. The idea here was to prevent the vibration from the fan being transmitted back down into the room.

Fan standing on the chipboard and foam platform

 

Soundproof Garage

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Soundproof a Room Stage 3 Part 1

soundproof airtight ducting ventilation breathe safety Soundproof GarageBecause the room needs to be sound-proof, in the simplest sense, this means that the room must also be air-tight. Obviously, an air-tight room is not practical, so ventilation has to be achieved without compromising the sound proofing. There are three principles that must be followed here:

  1. Always aim to move a large volume of air slowly, rather than a small volume of air quickly.
  2. The inside surfaces of the duct should be non-reflective. This is to damp any internal resonance that may occur in the duct, and eliminates the droning sound that can often be heard in ventilation ducting. The effect of the internal damping within the duct will not however overcome any problems created by violating the first principle.
  3. There must not be a direct line of sight from the sound source to the outside world. In other words, you should always move the air around at least one 90° bend.
First duct section between the outer wall and the fan position
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