Acoustically Dead Room????

BrentMcGhee
BrentMcGhee Posts: 548
edited July 2005 in Speakers
Is a room that is totally acoustically dead the best enviroment for surround sound?
Post edited by BrentMcGhee on
· Share on FacebookShare on Twitter

Comments

  • Skynut
    Skynut Posts: 2,967
    edited July 2005
    From what I read this is true.
    The only sound you want to hear is what is comming out of your speakers and not what is comming back after bouncing off walls.
    Skynut
    SOPA® Founder
    The system Almost there
    DVD Onkyo DV-SP802
    Sunfire Theater Grand II
    Sherbourn 7/2100
    Panamax 5510 power conditioner (for electronics)
    2 PSAudio UPC-200 power conditioners (for amps)
    Front L/R RT3000p (Bi-Wired)
    Center CS1000p (Bi-Wired) (under the television)
    Center RT2000p's (Bi-Wired) (on each side of the television)
    Sur FX1000
    SVS ultra plus 2

    www.ShadetreesMachineShop.com
    Thanks for looking
    · Share on FacebookShare on Twitter
  • HBombToo
    HBombToo Posts: 5,256
    edited July 2005
    I believe an acoustically dead room is not what you want because its not what we are used to in the real world.

    HBomb

    no spell check:p
    ***WAREMTAE***
    · Share on FacebookShare on Twitter
  • unc2701
    unc2701 Posts: 3,587
    edited July 2005
    I think you'd have to hear one and decided for yourself- they really **** with you and are kind disorienting. Your first reaction is to think that your ears are stuffed with cotton- there are zero reflections, which can somehow make it harder to pinpoint sounds... very weird experience...

    Anyhow, I would guess that you could design speakers for a room for like that, but you wouldn't want to use stock stuff- everything has relfections in mind. Dipole speakers would go from cool and enveloping to crappy-and-off-axis-times-2.
    Gallo Ref 3.1 : Bryston 4b SST : Musical fidelity CD Pre : VPI HW-19
    Gallo Ref AV, Frankengallo Ref 3, LC60i : Bryston 9b SST : Meridian 565
    Jordan JX92s : MF X-T100 : Xray v8
    Backburner:Krell KAV-300i
    · Share on FacebookShare on Twitter
  • gregure
    gregure Posts: 871
    edited July 2005
    I agree acoustically dead rooms are not the best environment, although some sound absorption is a good thing to prevent too much brightness and reflectiveness. A dead room would need fairly forward sounding speakers and a powerful amp to achieve good results.
    Current System:

    Mitsubishi 30" LCD LT-3020 (for sale**)
    Vienna Acoustics Beethoven Concert Grand (Rosewood)-Mains (with Audioquest Mont Blanc cables)
    CSi5-Center (for sale**)
    FXi3-surrounds (for sale**)
    Martin Logan Depth-Sub
    B&K AVR 507
    Pimare CD21-CD Player
    Denon 1815-DVD Player
    Panamax M5500-EX-Line Conditioner
    · Share on FacebookShare on Twitter
  • jmierzur
    jmierzur Posts: 489
    edited July 2005
    No!:eek: Definately not.

    Have a look at these articles at Harman International. This is a great place to start on acoustics. Do some searches for more information.
    · Share on FacebookShare on Twitter
  • nadams
    nadams Posts: 5,877
    edited July 2005
    I've done some work for a local audiologist in the past, and I went into one of his "isolation chambers". It is EXTREMELY creepy... You feel like you're deaf if you don't keep talking or making some sort of noise. It's very odd.
    Ludicrous gibs!
    · Share on FacebookShare on Twitter
  • audiobliss
    audiobliss Posts: 12,518
    edited July 2005
    Sounds like a fun experience...lol.
    George Grand wrote: »
    Jstas wrote: »
    Simple question. If you had a cool million bucks, what would you do with it?
    Wonder WTF happened to the rest of my money.
    In Use
    PS3, Yamaha CDR-HD1300, Plex, Amazon Fire TV Gen 2
    Pioneer Elite VSX-52, Parasound HCA-1000A
    Klipsch RF-82ii, RC-62ii, RS-42ii, RW-10d
    Epson 8700UB
    In Storage
    [Home Audio]
    Rotel RCD-02, Yamaha KX-W900U, Sony ST-S500ES, Denon DP-7F
    Pro-Ject Phono Box MKII, Parasound P/HP-850, ASL Wave 20 monoblocks
    Klipsch RF-35, RB-51ii
    [Car Audio]
    Pioneer Premier DEH-P860MP, Memphis 16-MCA3004, Boston Acoustic RC520
    · Share on FacebookShare on Twitter
  • HBombToo
    HBombToo Posts: 5,256
    edited July 2005
    Originally posted by Zero
    Absolutely not !

    :D LOL

    1/2twin
    ***WAREMTAE***
    · Share on FacebookShare on Twitter
  • Dennis Gardner
    Dennis Gardner Posts: 4,861
    edited July 2005
    Originally posted by unc2701

    Anyhow, I would guess that you could design speakers for a room for like

    They call them SDAs. :D

    You wouldn't have to worry about them being cornered for a change. You would actually get the low frequency gain that corners provide without the high frequency reflections that eff up the SDA soundstage.



    Now I wonder if I quilted all the side walls.....................
    HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable

    2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable
    · Share on FacebookShare on Twitter
  • BrentMcGhee
    BrentMcGhee Posts: 548
    edited July 2005
    yeah but with surround sound arnt all of the reflections and reverb already encoded into the soundtrack and therfore with all of the speakers suround you couldnt they emulate any type of enviroment?
    · Share on FacebookShare on Twitter
  • madmax
    madmax Posts: 12,434
    edited July 2005
    I have a fairly dead room. It will show any and all faults with your audio system. Now keep in mind, this is not nearly as dead as one of the chambers. To keep your sanity you need a little bit of reflection otherwise you will end up hating everything about your system that is not absolutely perfect. I think the perfect balance is to put together the best system you can then deaden the room to the point where you start hearing the inadequacies of your system.

    madmax
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D
    · Share on FacebookShare on Twitter
  • Airplay355
    Airplay355 Posts: 4,298
    edited July 2005
    Will an acoustically dead room get rid of the ringing in my ears from listening to music too loudly?
    · Share on FacebookShare on Twitter
  • Mjr7531
    Mjr7531 Posts: 856
    edited July 2005
    Nope, but not playing music as loud won't let it happen ;)
    · Share on FacebookShare on Twitter
  • Larry Chanin
    Larry Chanin Posts: 601
    edited July 2005
    Hi Brent,

    It is true that acoustics in a home theater should be deader than for 2-channel listening, but a totally dead room is not what professional theater designers shoot for.

    The Reverberation Time, which can be used as a measure of how dead a room is, is the amount of time required for an impulse sound to die down to a millionth of it's original level. The Reverberation Time for a typical sized home theater should be in the 250-300 ms range.

    Larry
    Larry's Home Theater
    · Share on FacebookShare on Twitter
  • BrentMcGhee
    BrentMcGhee Posts: 548
    edited July 2005
    Thanks Larry, I am asking because i have the chance right now to build a theater room from scratch and right now i am looking into acoustics aspect of it.
    · Share on FacebookShare on Twitter
  • Larry Chanin
    Larry Chanin Posts: 601
    edited July 2005
    Originally posted by BrentMcGhee
    Thanks Larry, I am asking because i have the chance right now to build a theater room from scratch and right now i am looking into acoustics aspect of it.

    Hi Brent,

    Here's a resource tha may help you:

    Master Handbook of Acoustics

    This Internet forum specializes in designing home theaters:

    Dedicated Theater Design & Construction

    Larry
    Larry's Home Theater
    · Share on FacebookShare on Twitter
  • del44
    del44 Posts: 686
    edited July 2005
    Brent. When I was making the acoustic panels for my HT room, I did alot of experimenting with various types of panels. I once had my room so dead sounding that it seemed eerie. Unfortunatly, I didn't have the right gear to test with, so it was trial and error. I used absorptive around the front and reflective/absorptive in the rear. I have yet to install diffusive panels. As I am sure they would help.
    · Share on FacebookShare on Twitter