how to listen/feel below 30hz sound?

Discussion in 'Archived Threads 2001-2004' started by Yoon Lee, Nov 1, 2001.

  1. Yoon Lee

    Yoon Lee Stunt Coordinator

    Joined:
    Jun 16, 2001
    Messages:
    162
    Likes Received:
    0
    Ok, how do I know if the system is pumping out below 30hz sound? Or, how do we know if the system is missing below 30hz sound? What am I supposed to hear/feel this low?
     
  2. John Cain

    John Cain Second Unit

    Joined:
    Nov 19, 2000
    Messages:
    359
    Likes Received:
    0
    Once you hear significant sound below 30Hz, you will know it!
    If you are not hearing it, you will not miss it.
    Also it is rare for CDs or DVDs to have information this low, unless it is a movie effect, or a top notch music recording of organ music.
    ------------------
     
  3. Len Cheong

    Len Cheong Second Unit

    Joined:
    Mar 18, 2000
    Messages:
    372
    Likes Received:
    0
    1. Rattling of household items - glass, heating ducts, etc.
    2. To be sure, put in a test tone cd and see. If your sub
    can't handle it, it will create a flapping sound. Test
    tone cds have specifice tone sweeps (e.g. 20-30 Hz).
     
  4. Han

    Han Second Unit

    Joined:
    Jan 13, 2001
    Messages:
    262
    Likes Received:
    0
    Along with a tone generator, an SPL meter will tell you if your sub/speaker is putting out a signal below 30Hz. In Avia's LFE sweep, once it drops below 28Hz or so, I can't hear a thing, but my SPL meter still shows a reading.
     
  5. Tor Arne

    Tor Arne Stunt Coordinator

    Joined:
    Aug 17, 2001
    Messages:
    75
    Likes Received:
    0
    Try Bjørk Vspertine track 8. It has some low 20s sounds. The Telegram album, track 10 has even lower bass, probably 20Hz. The Gorillaz album has some really low sounds. Track 7 begins with some about 30Hz sounds. Many other tracks on the Gorillaz album has short bursts of low frequencies. You can recognice them because they feel nice to hear. That's the best way to describe it IMO.
    I have a tone generator and I recognise the frequencies in case you wonder.
    TAH
     
  6. Neil Joseph

    Neil Joseph Lead Actor

    Joined:
    Jan 16, 1998
    Messages:
    8,332
    Likes Received:
    1
    Real Name:
    Neil Joseph
    Buy yourself a cheap copy of AVIA that you can use to setup your a/v and also check the frequency response of your speakers and room. It will tell you exactly how low your system goes. Right now, mine is sadly audible down to only 24Hz but once I finish making the Maxcaliber Supernova, that should change to at least 15-16 Hz.
    ------------------
    http://webhome.idirect.com/~orange1
    ------------------
    My Favourite DVD's
     
  7. Rick Radford

    Rick Radford Supporting Actor

    Joined:
    May 12, 2001
    Messages:
    642
    Likes Received:
    0
    Neil,
    Perhaps I missed it on my tests with Avia. But where does it tell you the frequencies? I've seen one place but it never goes below 20.xx Hz or so (always some decimal number).
    ------------------
    --RR
     
  8. Lewis Besze

    Lewis Besze Producer

    Joined:
    Jul 28, 1999
    Messages:
    3,134
    Likes Received:
    0
     

Share This Page