Help for acoustic wall improvement.

[Maurizio_Maggi]

hello everyone,
I changed house and also system at the same time ( see Erin Audio's Thread on Mcintosh 462)

https://audiosciencereview.com/foru...ew-by-erinsaudiocorner-com.43810/post-2270090

I would like to improve the acoustics of the room which is now still bare.
I live in Germany in Munich so if there is anyone around here who would know what products and manufacturers to use that can be purchased in Germany I would be grateful.

thanks in Advance!
Maurizio

 

[Keith_W]

Do not apply any room treatment until:

1. You finish furnishing your room,
2. You take some measurements with a microphone.

Toole points out that the target RT60 can be reached with normal furniture alone, and without room treatment. Room treatment needs to be tailored according to acoustic measurements. DO NOT simply buy "treatment" and slap it on walls, it is likely that you will create spectral distortion and worsen the sound.

 

[Sokel]

Hire a pro company about it if you're serious about this after you're done with furniture.
It will save you tons of time and frustration and it will be an overall solution.
It can be made to look nice too.

 

[DanielT]

hello everyone,
I changed house and also system at the same time ( see Erin Audio's Thread on Mcintosh 462)

https://audiosciencereview.com/foru...ew-by-erinsaudiocorner-com.43810/post-2270090

I would like to improve the acoustics of the room which is now still bare.
I live in Germany in Munich so if there is anyone around here who would know what products and manufacturers to use that can be purchased in Germany I would be grateful.

thanks in Advance!
Maurizio

Or combine dedicated room acoustic material, diffusers and absorbers with the furniture. See it as a whole.

Even diffusers can be seen as a nice interior detail:

Wood acoustic diffusers have become a decorative item - loved the idea!

Hi As an acoustician I am tired to tell people not to think room treatment only as absorption. In most small rooms absorption often creates more issues than it solves. Diffusion is a better solution. However, all I hear: they are expensive, ugly and difficult to place in a room. I am hence...

audiosciencereview.com

I think I can guess from your picture that on the left you have a window. Putting up thick curtains there can have a positive impact.

A thick large carpet on the floor can also be positive.

With a fair amount of furniture, carpets and so on you can go a long way.

 

[holbob]

Do not apply any room treatment until:

1. You finish furnishing your room,
2. You take some measurements with a microphone.

Toole points out that the target RT60 can be reached with normal furniture alone, and without room treatment. Room treatment needs to be tailored according to acoustic measurements. DO NOT simply buy "treatment" and slap it on walls, it is likely that you will create spectral distortion and worsen the sound.

What is the target RT60?

 

[Keith_W]

What is the target RT60?

The target RT60 be calculated for room dimensions and application. Look up DIN 18041.

 

[Sokel]

The target RT60 be calculated for room dimensions and application. Look up DIN 18041.

There's probably something I don't get here:

We are interested in music so A1 is out target, ok?
So for example, a 100 m³ room should target for a whooping second? That's about double from the equivalent older standard.
What am I missing?

 

[DanielT]

In any case. Extremes are not something to aim for anyway. Sound/ tones that linger too long then it becomes mushy and imprecise. A bit irritating to the ears.
Too little reverb on the other hand and it sounds dry, anemic, small and lifeless.

To get a little feel for it, listen here:

 

[Keith_W]

So for example, a 100 m³ room should target for a whooping second? That's about double from the equivalent older standard.
What am I missing?

Good question! I presume you were looking at this document? Those targets assume that the room will be 80% occupied as stated here:

I use Acourate's RT60 calculator, which has DIN 18041 adjusted for minimal room occupation. For a 100m^3 room the RT60 target is about 0.5s.

 

[Sokel]

Good question! I presume you were looking at this document? Those targets assume that the room will be 80% occupied as stated here:

View attachment 441487

I use Acourate's RT60 calculator, which has DIN 18041 adjusted for minimal room occupation. For a 100m^3 room the RT60 target is about 0.5s.

Thanks for that, for a moment I thought that something was way off, for example with my 240 m³ volume target seemed to be 1.2 sec, I should add mirrors in there
As usual then

 

[Bjorn]

I'm based in Norway. Feel free to contact me. Measurements are needed only to address room modes with pressure based traps. All other can be done with knowledge about acoustics and knowing the directivity of the speaker.

Oh, RT60 measurements are completely invalid for small rooms and will certainly take you in the wrong direction with a complete ulinear result. That's well proven decades ago and the irony is that those who say otherwise are in direct contraction to the inventor of the reverberation measurements himself!