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Re: OT: DIY Music Room sound-proofing
Haven't had time to read this whole thread but wanted to lay a salient
nugget of wisdom I learned years ago from one of the chief sound design
with Crown (a producer who helped to design the pressure zone microphone
THE CHEAPEST WAY TO SOUND PROOF A ROOM WITHOUT FUNDS:
If you go into your room in the middle of the day and can see a pin prick
light when the
lights are turned off, you are losing a whopping 40% of all the sound to
As he explained it, a room full of air is like a vessel full of water.
in that vessel and the water will come out a high pressure.
If you can make the room light tight, you immediately reduce the output of
bass waves which travel furthest) of the room by 40%.
Foam does virtually nothing, according to this guy, except to reduce the
high frequency content of the
audio WITHIN the room.
It is bass waves that are the greatest offenders because of their large
>From what I have heard (and I"m not expert) a 30 cycle bass wave is
something like 16 feet long.
That's for one stinking sine wave (the fundamental) and twice that for
first subsonic below
Foam will make a dry sounding room as Stefan pointed out and since every
room is , in essence ,
a shitty reverb unless you've spent some major bucks to make it a really
good acoustical space,
it's better to have a deader environment (internal foaming = good) and
reverbs or, better yet (for the champagne living on a beer budget
inexpensive or free
convolution , software reverbs with really good acoustically modelled
impulse files of real
reverberant spaces (read the freeware SIR convolution
the archives of
my Audio Plugin Junkies Annonymous tribe at tribe.net for those URLS)
The easiest way to fill all the holes in a darkened room is to go out and
buy a caulking gun full
of silicone caulk. You literally turn out the lights and walk around
caulking holes in the room
(pinprick sources of light) until the entire room is perfectly light tight.
Voila, you have now made your room as soundproof as possible short of
spending $3,000 USD
or equivalent to build an entire box within a box (yeppers, that means
raising the floor, lowering
the roof and building four walls around you that are insulated by a layers
of wood and foam, then
a layer of air (the greatest insulator, ironically) and then another layer
of wood and foam.
that's what I know about it. Hope it helps.