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  1. #1
    Barks's Avatar
    Barks is offline Junior Member



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    Hearing

    I have one 12 thunder 8000 in a seald box 1.45 cubic feet, powered by a jbl 600.1, running at two ohms, in the trunk of my car, what do ya think the chances of me suffering hearing loss are?







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    avistar23's Avatar
    avistar23 is offline www.SoundhertZ.com <---



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    how big is the box ?..... i doubt youd hit to hard with that.



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    what is it,.. i think its at 120dbs your suppoused to wear hearing protection..
    any1 know whats the db system is.. such as like...i know this isnt right.. just an example
    100db = some1 talking, 130 = gun shot 140 = train-150 a rocket.... i know thats not right, just curious as to what dbs = up to



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    geolemon is offline Senior VIP Member



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    Well..

    First off, remember that human hearing is frequency dependent.
    You are more sensitive to high frequencies than low ones.
    And likewise, are more susceptible to hearing damage with loud dB levels at high frequencies than at low frequencies.
    You might notice your ears ringing after a loud rock concert... all frequencies being loud, obviously (probably reasonably smooth across the spectrum even)... that's potentially damaging your hearing!

    But, then you might notice that with your bass going at dB levels that are even louder than that rock concert's bass was...
    And your ears don't hurt at alll, and there's no pain or ringing afterwards.
    How can this be?
    You are less likely to damage your hearing on low frequencies, in fact, the lower the better (I like that sentence... "the lower the better"... in all applications )

    So... to say "120 dB levels will damage your hearing"..
    I wouldn't dispute that, but I am not going to accept it either, without asking the question "OK.. at what frequency is that?"

    With one 12" subwoofer, and 600 watts, absolutely no doubt that even if you had a shoddy install and an inherently acoustically poor interior, and had all your windows rolled down, you'd still be able to easily exceed the 120dB mark...
    And yet I am confident saying that with that setup, you most likely won't reach dB levels that would harm your hearing, unless you were intentionally focusing your enclosure design around SPL competition..

    Not that you COULDN'T... mind you... I think that all of us need to be responsible with our listening, so that we can enjoy it for years, rather than months...
    But odds are even with super-120-dB levels, a 12" sub on 600 watts in a conservative enclosure, with reasonable listening habits, you won't be in danger.
    And if you do want to build an SPL type enclosure... foam earplugs are cheap, and they do knock down the dB's quite a bit.

    Particularly since you pose the question...
    That shows you are concerned for your hearing.
    And if you do have that little voice in the back of your head, my guess is that you will be responsible.. even if you had a wall of 15's with kilowatts of power behind it.
    Meaning that even then, your responsibility would keep you out of trouble.




  6. #6
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