John Sayers' Recording Studio Design Forum Archive

Here is an updated mdat file with the 1st reflection panels added to the side walls.

The panels are 2' x 4' x 4" and are placed on the wall with a 4" air gap. I put 2 panels side by side on each wall to catch reflection from L & R monitor.

https://www.dropbox.com/sh/abql3urgdhx9 ... YtmOa?dl=0

Please review and provide some feedback. Curious to see what you think of the results and what my next step should be.

Thanks!

Can you please post pictures of the treatment each time so that we can see exactly what you did. Strangely, the low mids improved in the mdat, but the upper mids seemed to get worse. There was a slight improvement on the impulse response when I was expecting more.

You seem to have a strong reflection ~2.855ms later than the initial transient hits your microphone. So, do the string trick and add this amount to the distance from your speaker to your microphone: Let us know where that reflection is coming from. Also, is there anything you have changed other than ADDING panels? I'm wondering if since you said you added two panels on each side, maybe the frames around the insulation are causing other reflections. Without pictures, it's hard to say.

Greg

Hey, what do you mean by the string trick? You lost me on that last request of adding distance from speaker to mic.

Here are pictures of the panels... they are setup the same on the other wall.

Do you think I should remove one of the panels and only worry about catching reflection from the monitor from the opposite side of the room? For example, on the left wall, only have a panel in place where the right monitor woofer/tweeter reflection is seen?

Hey, what do you mean by the string trick? You lost me on that last request of adding distance from speaker to mic.

A few helping hands will make this go really fast:
- measure the distance from the acoustic axis of your speaker to the tip of your measurement mic (write this down).
- add the distance I gave you to that measurement.
- now, mark on a string that total length. That is the distance that first reflection is traveling.
- tape, or have your helping hands hold the string so that one end is at the acoustic axis of the speaker and the other is at the tip of the measurement mic.
- take the string slack and find out what possible locations the sound would have bounced off of to travel that distance. It's obviously places like the ceiling, floor, walls, desk/other furniture. The goal is to stop that reflection from hitting your mic so loudly, or at all!

Here are pictures of the panels... they are setup the same on the other wall.

Do you think I should remove one of the panels and only worry about catching reflection from the monitor from the opposite side of the room? For example, on the left wall, only have a panel in place where the right monitor woofer/tweeter reflection is seen?

When you did the "mirror trick" to determine where your speakers would be bouncing off the side walls, did you happen to put the absorption panels in a place that might allow the vertical framing of the panels to reflect the sound at your head instead of hitting the insulation?

Greg

I don't believe so, but Ill double check.

Thanks for the string explanation also.