Need advice on waterfall!

[erikdrink]

Hello

Today I took some measurments of my room. I think I did it correct!?
Anyway this is what I got from it.



Any advice is appriciated

[Glenn Kuras]

view from 30hz to 400hz and set the time to more like 500ms. Looks like you have a ton of ringing to me. Also know your layout with dimensions of the room will help.

[erikdrink]

Okey, just a moment! My son has gone to bed so I might have to do it again tommorrow


My room dimensions are:

Width: 7ft

Length: 11.5ft

Hight: 8ft

My room is treated with the "Primacoustic London 12a Broadway Room Kit"

[erikdrink]

Hmmm, I think I have done a huge mistake!
The input from the mic is not suppose to feed the monitors whilst testing?

[Glenn Kuras]

Originally Posted by erikdrink

Hmmm, I think I have done a huge mistake!
The input from the mic is not suppose to feed the monitors whilst testing?

Well if you set it up wrong then you will need to retest. If not then you can just reset the viewing on the screen up to 500hz and 500ms.

[erikdrink]

Let's see here, think I got it this time!

[Glenn Kuras]

Something does not seem right with the test. You may want to check your set up again to make sure you have everything correct.

[erikdrink]

Hmmm, I will do so. You mean the enormous amount of ringing?

[DrFrankencopter]

The peaks are only a little over 40 dB above the noise floor. Can you test at a louder volume?

Could that ringing be some kind of electrical interference? 50 or 60 Hz hum & harmonics?

Cheers

K

[erikdrink]

Might be my computer?
but is the input from the mic suppose to feed the monitors whilst testing so that I get heavy feedback? If not I can understand the ring problem.

[Demor]

No, you don't want the mic feeding your monitors. There is your problem.

[DrFrankencopter]

Originally Posted by Demor

No, you don't want the mic feeding your monitors. There is your problem.

Agreed!

[erikdrink]

Hmmm, time to redo the whole act!
Thanks

[erikdrink]

Well, it does not very much better this time. This time the mic did not feed the monitors!

[Demor]

Well, it is much better, now adjust the window to a 60dB frame and it will look even better.

[erikdrink]

Just a moment, lets see...

[Glenn Kuras]

Now adjust the time to 500 ms.. Better yet can you just post the REW file and let me load it?

[erikdrink]

Tried to upload it as an mdat. file but no luck!

[erikdrink]

Here ZIP

[Demor]

Can't open your file right now since I'm on my Ipad, but doesn't this look a lot better?

[erikdrink]

Yes, after adjusting the window to a 60db frame it got a whole better. Still a ring at 50herts and some more though

[Demor]

If you adjust the window to something like 55 dB you get to see some of the tails. This could be valuable information.

[erikdrink]

Like this:

[Demor]

Yes like that, but I don't think these are the tails of some ringing, this looks like noise. Its just to even. So no problem there, put it back on 60 and change the duration of the window to 500 ms like Glen said.

[erikdrink]

Like this:

[Glenn Kuras]

I redid the setting for you so you can see really what is going on (if the test was done correctly). Seems to me you are having the same problem people have in smaller rooms, decay times that are long in the low end with nulls and peaks. For this you need proper broad bass trapping starting with corners and if you have the budget (and or handy with power tools with knowledge of acoustics) you could go with something tuned. Note that tuned is great but is another level that is not as easy as one might think or have the budget for it.

[erikdrink]

I can't really do that much with my corners do to a window and a door. Would it help on the low end to make something in the ceiling?

[Demor]

Ceiling to wall are corners as well, soo........ yes.

[Glenn Kuras]

Originally Posted by Demor

Ceiling to wall are corners as well, soo........ yes.

agreed.

[erikdrink]

Alright, thanks for everything! Will update this post when improvement has been done...