Here is a great link: http://www.ethanwiner.com/acoustics.html, it will help you understand. Go to this site, download the room mode calculator, and use it to figure out your room size. There are a few "ideal" ratios for room height, width, and length that professional studio designers agree should be used if possible. Three of these ratios, developed by L.W. Sepmeyer, are shown in Table 2.
Height Width Length
1.00 1.14 1.39
1.00 1.28 1.54
1.00 1.60 2.33
Table 2: The ideal room has a ratio of height, width, and length similar to one of these.
I found out a tall ceiling and a large room almost always sounds better, but most rooms are limited to their ceiling height. Example, let's say a room is 8ft. high, using the room mode calculator estimate the other dimensions you feel you can fit in your space and see if they are exemptible ratios in the chart. I came up 8ft. H x 12.6 W x 17.5 L using the mode calculator = H 1.00 W 1.58 L 2.19 as you can see they are acceptable ratios in the chart
Height Width Length
1.00 1.14 1.39
1.00 1.28 1.54
1.00 1.60 2.33
1.00 1.58 2.19 < My example:
Once you get the room built you should still do a sound treatment because even tough you have ideal ratios you are still going to have standing waves and nulls, etc. Here is a link to help you with with room treatment. http://www.realtraps.com/
