I decided it was time, well the wife decided, it was time to reduce the noise of the miners coming from The Mine (AKA loft crawl space)
I researched a few ideas like egg boxes on the walls of the The Mine, standard packing sponge foam and the good foam they use in sound recording studios. I came across a company called The Sound Deadening Shop based in the UK that specialised in sound proofing. I messaged them and got a quick response from a chap called Colin that was informative and to the point:
Thanks for your enquiry.
MLV is a highly dense material that forms a barrier to unwanted noise. I can confirm that this material is the best choice for reducing low frequency noise intrusion.
As most of the sound was coming from the hatch to the crawl space I figured I would give this a go first and bought a roll of there MLV to go on the back of the door. The door is made of thin plywood with air cavity. Typical interior UK door
First to establish a baseline and record the sound level with the door open and closed. The sound meter never moved position through out the test.
I attached the MLV to the back of the door. I did this from inside The Mine so I could fit the MLV snug right up to the edges leaving as little air gap as possible. I should have used the correct acoustic glue but I was a bit sceptical what the results would be and didn’t want anything too permanent, so I used small picture nail. Maybe with the glue the noise will reduce further
I was a bit sceptical this would even work but looks like we have a result. 20mins work, a reduction of 2.5dB and my wife is a little happier! that’s got to be worth £25 in anyone’s book.