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My first acoustic measurement
Old 15th September 2018
  #1
Here for the gear
 

My first acoustic measurement

Hello,

After a lot of research about acoustics for setting up my home studio, I took first measurement and the results below.

I can clearly see an issue with the 40hz

Can u spot anything else?


Full measurements file -
Dropbox - mamad2.mdat


Thanks!!
Old 16th September 2018
  #2
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akebrake's Avatar
 

Quote:
Originally Posted by Niz View Post
I can clearly see an issue with the 40hz

Can u spot anything else?...
Hi Niz,

Welcome to GS!

Yes that 44Hz goes on forever...

Just looking at your measurements I would say:

1. They are fairly noisy. Machinery? Traffic? AC?
2. FR is relatively even down to 100 Hz. +6/-10 db
3. Below 100 Hz a lot of bass trapping needed

All curves look similar. Only open door (meas 4 orange) cures that 44 Hz peak

What do you want with this room? Do you have a plan?

Best
Attached Thumbnails
My first acoustic measurement-niz-all-spl-var-smooth.jpg   My first acoustic measurement-niz-open-door-44-hz.jpg  
Old 17th September 2018
  #3
Here for the gear
 

Quote:
Originally Posted by akebrake View Post
Hi Niz,

Welcome to GS!

Yes that 44Hz goes on forever...

Just looking at your measurements I would say:

1. They are fairly noisy. Machinery? Traffic? AC?
2. FR is relatively even down to 100 Hz. +6/-10 db
3. Below 100 Hz a lot of bass trapping needed

All curves look similar. Only open door (meas 4 orange) cures that 44 Hz peak

What do you want with this room? Do you have a plan?

Best
Thank you man!

You're on the spot - AC was on.
I'll try to run some new tests while the AC is off.

The room is packed with 12 corner traps overall + quite an amount of absorbers (good quality, 30-40 kg density for sqm)

This is my humble home studio, and I'm trying to figure out how to correct the FR in the most effective way.

The room is built of reinforced concrete + there's a niche right where the door is (probably the reason for the 40hz issue when the door is closed)

But that door should be closed (and sealed) when the recording mode is on...

Attached is a sketch of the room.

Yellow circles = monitors
Black rectangle = desk
Green star = sweet spot

Dimensions (CM) -
W280
L340 (with niche 395)
H250



In general, I can always see and hear the "muddy" mid-highs - how can I make those sharper?

Also, any ideas for DIY standing traps to "block" that problematic niche?
Do you think I should cover the ceiling with some absorption?


Thank you.
Attached Thumbnails
My first acoustic measurement-capture.png  
Old 18th September 2018
  #4
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akebrake's Avatar
 

Quote:
Originally Posted by Niz View Post
Thank you man!
My pleasure!

Quote:
You're on the spot - AC was on.
I'll try to run some new tests while the AC is off.
Excellent! Run L & R separately plus L+R.
As the room is not symetric it’s interesting to watch the difference L/R.
Do you have a sub also? Measure sep and together.

Quote:
The room is packed with 12 corner traps overall + quite an amount of absorbers (good quality, 30-40 kg density for sqm)
Hope you meant cubic meter...
What size are these traps?

Soft corner traps (if large and deep) are good for cutting down decay in a broadband fashion. Low frequency waves travel around the room and meet these traps a number of times during decay. But below 100 Hz absorption decreases and decay time will be much longer.

With only corner traps first reflections still have large flat concrete areas to bounce from. Shallow (small?) absorbers, on a wall or ceiling, are not sufficient to reduce that first bounce. This means FR is still bumpy.

Quote:
This is my humble home studio, and I'm trying to figure out how to correct the FR in the most effective way.
Home studio... Miking instruments/ vocal in there?
Topic:
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