Room Acoustic Simulation for Markus

Tenson

Tenson

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Markus wanted to know if it will be better to fire his speakers across or down the room in his new house. Knowing this, he can have the power sockets in the walls put at a good location for the hi-fi.

Here are a couple of quick positional optimisations for the room shown below, with some standard 3-way speakers. The room has a sofa, two book cases and carpet as absorption. When Markus gets things setup in reality, a more detailed sim can be done.

Looks to me like firing down the 4.5m lenth of the room (picture 2) is best. Not only does this seem to yield the smoother bass response but because there is no window behind the seating position, an absorber could be put here to reduce comb filtering from close rear wall reflections. Bare in mind however, that the greater distance from the speakers with this orientation means more reverberant to direct sound (more 'room' sound) so you might need to use more absorption or diffusion.

The Room
Markus said:
7746231842_9c21e479ae_c.jpg


Here's the room. Horizontally, it's 4,5 m, vertically, it's 3.64 m. BRH = window breast height, meaning a window that reaches down to the floor (looks like a glass door, really).
Click to expand...

The Results
1.jpg


2.jpg
 
Both results appear to be reasonably good, apart from the 40 Hz suckout in the long wall position (where the hell does that come from?) I don't see anything that should be too problematic once there's some bookcases and perhaps a bit of acoustic treatment in the room.

This simulation and Tony's thread over on pfm have convinced me that I will probably prefer the short wall positioning, mainly as it allows putting the speakers either side of the door so they won't dominate the room. And I do tend to prefer a bit of a distance between me and the sepakers anway, I hate being assaulted by sound.

But I'll also make provisions for long wall positioning so if the short wall doesn't work out, I'll have the option of moving the room around.

Thanks again, Simon, it's been very helpful.
 
Cara

Simon

I think you are using Cara. Version 2.2? Or is there a more up to date version. I'm struggling to install in under Win 7 64. Any tips?
 
It's 2.2 Plus. Though I think that might just mean it comes with a tutorial CD.

Anyway it works fine for me, except some custom furniture items, on Win7 32bit.
 
It's 2.2 Plus. Though I think that might just mean it comes with a tutorial CD.

Anyway it works fine for me, except some custom furniture items, on Win7 32bit.
 
Thanks, I'll have another go. I think I have 2.2 Plus also. Would be interesting to give it a go.


Btw, I'm geting this errot on posting

Parse error: syntax error, unexpected T_BOOLEAN_OR in /var/www/vhosts/audiosmile.com/httpdocs/forum/includes/functions_newpost.php(360) : eval()'d code on line 5
 
I also got that error starting yesterday. I think it should be fixed now.

Seems that the version of spam-o-matic we were running suddenly became incompatible. I can only assume the host updated something running on the server like php.
 

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