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acoustic panels

post #1 of 7
Thread Starter 
Hi all,
i have a few panels installed,by me. For the first two reflection points.
The sound improve a lot,but,the panels are not hung on the wall yet.
I notice that bass isn't "loud",i grab my sound pressure meter out and the sw output is reading 75 db. I also did a bass test sweep from 40hz,50hz 63hz & 80 hz. the 40hz reading was 82db at listening position the 50 hz reading was also 82 db. 63hz reading was at 74db and 80hz was 72db. Receiver is cross at 80hz.
Don't get me wrong,the panels help a lot in dialog and every thing else.
Im just missing the sw volume.I may try and re-calibrate tonight to see if i get a different settings. i can hear the sw but it's barely putting out volume,i know it works because i tested toy story 1 on blu-ray and it was kicking but.
post #2 of 7
What are the dimensions of the room?
What subwoofer is it?
How thick and what material are the panels?
Was the SPL meter set to C weighting and slow response?
How far from each (of the two closest) wall is the sub placed?
post #3 of 7
calibration is the way to go
post #4 of 7
have u done a calibration? don't mean to be rude but calibration does help!
post #5 of 7
Quote:
Originally Posted by DDigitalGuy05 View Post

i have a few panels installed,by me. For the first two reflection points. The sound improve a lot,but,the panels are not hung on the wall yet.

You'll get even better results once the panels are centered vertically at ear height.

Quote:


I notice that bass isn't "loud",i grab my sound pressure meter out and the sw output is reading 75 db. I also did a bass test sweep from 40hz,50hz 63hz & 80 hz. the 40hz reading was 82db at listening position the 50 hz reading was also 82 db. 63hz reading was at 74db and 80hz was 72db.

Spot checking a few tones at third-octave intervals hides most of the detail. The best way to know what you really have is to use appropriate software. Here's my standard list of links for that:

Room EQ Wizard, Windows and Linux and Mac OSX 10.4+, Freeware
ETF, Windows, $150
FuzzMeasure, Mac, $150
Room Measuring Primer
Comparison of Ten Measuring Microphones

If you have no easy way to connect a computer to your system, this is second-best:

Test Tone CD

--Ethan
post #6 of 7
Thread Starter 
@Ethan thanks for the links. Yeah,
i do have a laptop to use. How would i use this with my radio shack spl meter? do i need a special cable?
post #7 of 7
^^^ See the Room Measuring article linked above. If you use an SPL meter instead of a microphone, you'll skip the preamp and send the SPL meter to your sound card's line input.

--Ethan
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