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I think I over treated my room. I can't hear anything.

Now that I got your attention. I've been posting questions about treating my listening room in my new house that I'm moving into in a month. 
I just remembered a trip I took to the Johns Manville testing facility in Littleton, CO back in 2002 while working for an Insulation company here in Milwaukee. Allied Insulation.
A small group of us walked into this room and it was hard to hear anyone talking when standing next to one another. I couldn't find any info about that facility but I did find a site where the room looks the same.
Most of you know if you use a SPL meter in any room in your house with nothing running the meter still registers 30 or so decibels. This room claims to have a minus 9 something. They also claim that 45 minutes is the most that anyone can handle. Check this out.
https://www.smithsonianmag.com/smart-news/earths-quietest-place-will-drive-you-crazy-in-45-minutes-1...
golden210
12 responses Add your response
pgaulke60
299 posts
 
Thanks - Interesting post.
curlyhifi
157 posts
 
Your listening room or area is the most important part of your system. You are in a great spot starting in your new home. If possible get your equipment in and start adjusting the room.
Some of the highest rated equipment can sound terrible in a poorly tuned environment 
wolf_garcia
6,695 posts
 
I have a small jet and not only is it hard to keep vinyl records under control on it (especially on take off and landing), it gets really hard to focus on micro-nuance during a flight due to the ambient roar of the engines...if I can get my pilot to just glide a little it's so frightening for the passengers it's really not worth it. Acoustic shows on a DC3 used to be the same issue as my quiet ukulele solos were basically inaudible...got paid anyway.
jc4659
550 posts
 
Makes you wonder if you can hear noise such as that from a vibrating transformer in any equipment that you would otherwise swear is dead silent.  How about the rumble of a turntable or the stylus tracking grooves on a record with no audio connections except power?  This would all be noise that is typically drowned out by ambient noise.  I bet cooling fans would be really noisy.

toddalin's avatar
toddalin
238 posts
 
Yes, -9 dB is way less than we can hear, but it is a valid number.

Zero dB is defined as 20 micropascals ( 0.00002 pascals), so any sonic energy level less than 20 micropascals is a negative dB level.
pokey77
1,266 posts
 
@noromance

I definitely here on that second part.
oldhvymec
5,101 posts
 
How do you get to -9, really that's interesting.. That's less than what we can hear? I don't understand. It's a negative sound pressure. How does that work? Got me on that one.

Regards
noromance's avatar
noromance
9,769 posts
 
Interesting but nothing we don't know already. Not a fan of clickbait title.
nonoise's avatar
nonoise
10,838 posts
 
I know a few who should be made to stay in that room for at least an hour.
fuzztone's avatar
fuzztone
5,598 posts
 
Sober up.
erik_squires
16,056 posts
 
So, you are posting a bunch of questions in other threads, but here you want to talk about an anechoic chamber??
dill
2,525 posts
 
What?
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