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 Post subject: Room Decay Times
PostPosted: Sun Apr 10, 2016 6:43 am 
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Location: Charlottetown, PE, CA
Does anyone here use an RT60 plot or similar to measure the decay times or decay vs frequency of their room? I'm wondering if anyone here has crossed the 0.3s mark into shorter territory and their subjective impression.


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 Post subject: Re: Room Decay Times
PostPosted: Sat Apr 23, 2016 5:29 pm 
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Location: Charlottetown, PE, CA
No one?

Does anyone here take measurements to evaluate rt60? Just me?

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 Post subject: Re: Room Decay Times
PostPosted: Sat Apr 23, 2016 5:35 pm 
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Joined: Thu Nov 28, 2013 2:37 pm
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Location: Port Ryerse, ON
At my age I'm only concerned with tooth decay. Sorry.

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 Post subject: Re: Room Decay Times
PostPosted: Sat Apr 23, 2016 5:36 pm 
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Location: Charlottetown, PE, CA
I'm trying to figure out how much more treatment my space can take before I start to get into the dead zone. I will likely have to stick with diffusion for additional efforts. Anyone have shorter decay times than these?

Frequency Raw RT60 Corrected RT60
Overall 0.28 0.34
Octave
63 0.37 0.37
125 0.36 0.36
250 0.33 0.33
500 0.28 0.33
1000 0.27 0.32
2000 0.25 0.3
4000 0.27 0.32
8000 0.25 0.3
1/3 octave
63 0.39 0.39
80 0.38 0.38
100 0.36 0.36
125 0.36 0.36
160 0.36 0.36
200 0.35 0.35
250 0.36 0.36
315 0.32 0.36
400 0.28 0.36
500 0.34 0.33
630 0.23 0.33
800 0.28 0.33
1000 0.27 0.32
1250 0.25 0.31
1600 0.26 0.31
2000 0.24 0.3
2500 0.25 0.31
3150 0.27 0.31
4000 0.27 0.32
5000 0.26 0.31
6300 0.26 0.31
8000 0.24 0.3


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 Post subject: Re: Room Decay Times
PostPosted: Sat Apr 23, 2016 5:44 pm 
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Location: Vernon, BC, CA
A little off topic but your room looks like a really great space!


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 Post subject: Re: Room Decay Times
PostPosted: Sat Apr 23, 2016 6:02 pm 
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Location: Charlottetown, PE, CA
Thanks. :)

I took a bunch of measurements tonight. It was a long hour week up till today so my night was pretty low key. Anyway, I'm trying to plan my rear wall treatment. I think it will be an abfuser design. Basically a deep QRD with 1/4" ply as well covers stuffed with insulation. Trying to weigh out options and predict outcomes before building.... tough one.


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 Post subject: Re: Room Decay Times
PostPosted: Sat Apr 23, 2016 7:18 pm 
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Joined: Sun Jan 02, 2005 10:11 am
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Location: Quebec, QC, CA
RT60 is not very usefull for small room

I check early reflection with smart live


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 Post subject: Re: Room Decay Times
PostPosted: Sat Apr 23, 2016 7:27 pm 
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Location: Charlottetown, PE, CA
What are your ETC -60 times like then?


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 Post subject: Re: Room Decay Times
PostPosted: Thu Jul 20, 2017 4:47 am 
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Joined: Wed Jun 18, 2014 11:04 am
Posts: 202
Location: Chicoutimi, QC, CA
Here's my measurements. I did a post about m'y measurements yesterday.

Yellow and blue are the newest measurements.

Attachment:
Meilleur RT 60.jpg
Meilleur RT 60.jpg [ 58.65 KiB | Viewed 1407 times ]


Getting above 0.3 sec in all frequency seems to be pretty hard.


Last edited by patate91 on Thu Jul 20, 2017 5:57 am, edited 1 time in total.

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 Post subject: Re: Room Decay Times
PostPosted: Thu Jul 20, 2017 5:52 am 
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Joined: Fri Nov 18, 2011 6:41 am
Posts: 260
Location: Ottawa, ON, CA
Its like looking for flea poo in a bowl of pepper...who cares unless your writing a paper for a Nobel prize that no one will ever read. Do you really think the common ear like most of us have cares or would notice any difference. When we are going up
the ear adjusts to changes and is accepted as being normal. Every thing now adays seems to be pycho analized to death...try and let it go and have a normal life like the rest of us.


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 Post subject: Re: Room Decay Times
PostPosted: Thu Jul 20, 2017 5:59 am 
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Joined: Wed Jun 18, 2014 11:04 am
Posts: 202
Location: Chicoutimi, QC, CA
We all live our passion differently. I like to listen, compare and fiddle, tweak my system.

If it doesn't matter to you why are posting here???


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 Post subject: Re: Room Decay Times
PostPosted: Thu Jul 20, 2017 7:19 am 
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Joined: Wed Jul 09, 2014 2:06 am
Posts: 294
Location: toronto, ON, CA
I live in a 100 year old house.
My living room is also starting to decay.
The plaster is cracked and the paint is peeling.


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 Post subject: Re: Room Decay Times
PostPosted: Thu Jul 20, 2017 8:20 am 
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Location: Kingston, ON, CA
the 100 year old horse-hair plaster and slat board is a terrific absorber, compared to the near total audio disaster that is drywall and 2x4 framing.

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 Post subject: Re: Room Decay Times
PostPosted: Thu Jul 20, 2017 8:27 am 
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Joined: Wed Jun 18, 2014 11:04 am
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Location: Chicoutimi, QC, CA
Teo Audio wrote:
the 100 year old horse-hair plaster and slat board is a terrific absorber, compared to the near total audio disaster that is drywall and 2x4 framing.


I made my bedroom's wall with straw covered with clay/sand/straw plaster and the acoustic is totally différent from standard construction.


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 Post subject: Re: Room Decay Times
PostPosted: Thu Jul 20, 2017 4:37 pm 
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Location: Toronto, ON, CA
Teo Audio wrote:
the 100 year old horse-hair plaster and slat board is a terrific absorber, compared to the near total audio disaster that is drywall and 2x4 framing.

Ain't that the truth. Discovered that when I renovated my 120yo Victorian semi. Should've put 2 layers of drywall up, at least. Haven't done the bathroom yet, and it's the best sounding room in the house. :lol:

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