entire room w/4" fiberglass?

[xqtion]

hello John n thanks for sharing ur valuable knowledge with us:)
i'm just a producer/songwriter who's trying to make the best out of my small (L 11.8' x W 10.8' x H 7.4') apt. room. i am really drawn to ur DIY wall units design http://www.johnlsayers.com/HR/index1.htm . but then as i was checking out the coefficient chart in ur " Recording Manual " i realised that 4" fiberglass absorbs pretty much evenly thru out 125Hz~ 4KHz. i am aware (thanks to ur site:) that it is ideal to treat a room evenly thru out the entire frequency range. so this leads to my question....
1) would'nt it be simpler to just make 4 corner absorbers in my room n then just use 4" fiberglass on rest of the wall surfaces, including the ceiling ? (sorry if this doesn't make any sense, i'm just a newbie)

2) on the ceiling of the Flying Fox Studios, u used a "new wool" instead of fiberglass. can u please tell me more about it ? what kind of absorbing specs does it have thru out the freq range ? also where can one purchase them ?

thank-you very much ur website rules !!

[John Sayers]

Yes - 4" probably does absorb throughout the frequency range but you don't want a totally dead lifeless room. The advantage of slots and panel absorbers is that they only treat the low mids and leave the highs alone.

Flying fox ceiling is "Pure New Wool" - it's a national slogan here in aussie land - but there are companies that manufacture insulation out of wool which is a natural fibre and not prone to showering everyone with glass particles. (do a google search and you'll find them)

It's not as effective as fibreglass but many prefer it here because it's natural. I redid Music Farm in 1995 because the new owner didn't want any fibreglass or rockwool in the studio because Olivia Newton John was intending to record there and she was still recovering from breast cancer. That was cool - plus I got to engineer some of her album

cheers
john

[xqtion]

thank-you very much