How do I fix this

[bigwillz24]

This is an image of the room when i shot pink noise into it and recorded the the sound through an omnidirectional shure microphone at my sitting postion. Note the dip at 70Hz-150Hz. How do i go about fixing this.

 

[reshp1]

Sorry I can't help directly, but try posting it in the studio building forum. There's a few acoustics whiz's who hang out there regularly.

 

[cavedog101]

without knowing the frequency response of the mic used it would be hard to say...a better view of this for you would be to use a measuring mic that is absolutely flat from below 20hz up to 40k.

 

[Ethan Winer]

Will,

> i shot pink noise into it <

I don't know how good Harbal is as a room analyzer, but it's not meant for that so my guess is not so good. Either way, you should take that response with a grain of salt. In all likelihood your low end response is much worse than shown, and your high end response is probably a little better.

> How do i go about fixing this. <

The solution for a skewed low end response - which is absolutely typical of all small rooms - is acoustic treatment and especially bass traps.

--Ethan

 

[bigwillz24]

Thanks for the info:
But i don't think the apartment complex will take kindly to me putting up acoustic foam everywhere on the walls.

(little light bulb goes off)

Will i get the same results if i just bought some accoustic foam and hung it with a tack of something instead of spraying glue on the walls that way when its time to leave I can take it down without screwing up the walls?

 

[Ethan Winer]

Will,

> i don't think the apartment complex will take kindly to me putting up acoustic foam everywhere on the walls. <

That wasn't exactly what I meant when I suggested bass traps.

> Will i get the same results if i just bought some accoustic foam and hung it with a tack <

Have a look at the Acoustics FAQ, second in the list on my Articles page:

www.ethanwiner.com/articles.html

It's a long article, but when you're done you'll know a lot about acoustics and the best ways to treat these problems.

--Ethan

 

[tkingen]

In my experience with acoustic foam, it makes no difference whether you use glue or T-pins from a fabric store to mount them to the wall. Foam panels can certainly help out with flutter echoes and high/mid absorption. However, once you research Ethan's site you will understand that you will still have a bass problem.
Good luck.

Terry

 

[bigwillz24]

Thanks for the replyies guys looks like i got some reading to do

 

[bigwillz24]

Thanks for the replies guys looks like i got some reading to do