Speaker = fire extinguisher??

labrat
labrat Posts: 120
edited April 2024 in Clubhouse Archives
Hi all

I was reading the April 06 Boys Life with my Tiger Cub when we ran across an article that described extinguishing a candle with a 120 db 55 hz tone. Since that is not something to pass up we donned ear protection and gave it a try. I ran a disc with tones 5 hz apart starting at 20 with no luck. We should have measured with the spl - but didn't so I don't know how close to 120 we got. We did manage to blow out the candle when we put it right in front of the sub with the grill removed (it went out about 35 hz). Can anyone out there get at least 120 db at 55 hz? If so I would love to hear the results.

Scott
Post edited by RyanC_Masimo on
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  • audiobliss
    audiobliss Posts: 12,518
    edited April 2006
    Are you talking about the air or the sound waves 'blowing' out the candle? Is it even possible for the sound waves to do that?
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  • Dennis Gardner
    Dennis Gardner Posts: 4,861
    edited April 2006
    Each speaker would do it at different frequencies based on their tuning points. Sealed or ported would make quite a difference too.
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  • Toxis
    Toxis Posts: 5,116
    edited April 2006
    if it's the frequency and level of output that would put out the flame, the type of enclosure would not effect the outcome if it is at 55htz at 120db. sealed or ported, it was still the same frequency at the same frequency.
    Never kick a fresh **** on a hot day.

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  • audiobliss
    audiobliss Posts: 12,518
    edited April 2006
    Toxis wrote:
    sealed or ported, it was still the same frequency at the same frequency.
    Glad to see that if something's at the same frequency, then it's at the same frequency. ;)
    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
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    Epson 8700UB
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    [Home Audio]
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  • Dennis Gardner
    Dennis Gardner Posts: 4,861
    edited April 2006
    Toxis wrote:
    if it's the frequency and level of output that would put out the flame, the type of enclosure would not effect the outcome if it is at 55htz at 120db. sealed or ported, it was still the same frequency at the same frequency.

    My thoughts were that the candle could be put out by airflow from woofer movement at different levels of pressure, depending on the box design and woofer travel as labrat found.

    I agree that 120db at 55hz could create a soundwave that could do the job, not simply the airflow. I don't want to be in the room with it though.
    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
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited April 2006
    I know my SVS ports could blow out a candle at about 3 feet when it's being pushed. No doubt in my mind. It has levetated a file folder at 1 foot.
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • Demiurge
    Demiurge Posts: 10,874
    edited April 2006
    jdhdiggs wrote:
    I know my SVS ports could blow out a candle at about 3 feet when it's being pushed. No doubt in my mind. It has levetated a file folder at 1 foot.

    haha, that's awesome.
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited April 2006
    Yup, set it up in 16Hz mode and play a 16Hz tone, crank the amp and feel the tornado!
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • labrat
    labrat Posts: 120
    edited April 2006
    The magazine article we were reading was talking about putting out fires in space. If you use a conventional extinguisher the foam gets everywhere and recks the equipment. To avoid that they were talking about using sound waves - and hearing protection.

    My sub is sealed so it has no port. Just wondering if anyone could replicate the 120 db 55 hz tone and see if it works.

    Thanks to any that can help with this experiment,

    Scott
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  • AsSiMiLaTeD
    AsSiMiLaTeD Posts: 11,728
    edited April 2006
    jdhdiggs wrote:
    I know my SVS ports could blow out a candle at about 3 feet when it's being pushed. No doubt in my mind. It has levetated a file folder at 1 foot.
    LOL when I first read this I read it as file cabinet instead of file folder for some reason.

    I was like 'JESUS CHRIST!!!!!!!!'
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited April 2006
    audiobliss wrote:
    Are you talking about the air or the sound waves 'blowing' out the candle? Is it even possible for the sound waves to do that?
    Same thing. Sound waves are just energized air.

    In my youth, I blew out matches with the woofers of Lafayettes. Distance was probably around 6". Volume was set to "loud".

    Then again, I also blew out some woofers.
    More later,
    Tour...
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  • bikezappa
    bikezappa Posts: 2,463
    edited April 2006
    labrat

    It is true. A more interesting experiment is to make an Air Cannon which can easily blow out a candle 20 feet away. Do a google Air Cannon search for the best dimension, diameter and length. It's basically a tube with a rubber cover at one end, similar to a long drum. Bang or hit the rubber and a blast of air will travel across the room to blow out the candle. You can feel the air hit you also.

    The Germans were investigating this air cannon during WW2 to shoot down planes because they were running out of ammunition. They thought the plane would loose control and crash. The Germans were going to use explosives instead of a rubber cover. It didn't work however.

    For the sub to blow out the candle I think you need lower frequencies.

    Have a blast.

    Peter
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  • audiobliss
    audiobliss Posts: 12,518
    edited April 2006
    Wow. That's interesting. Using sound waves to put out fires in space? Cool!
    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
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  • bikezappa
    bikezappa Posts: 2,463
    edited April 2006
    Space, do you mean like outer space like in orbit? There is no air to move out there.
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  • George Grand
    George Grand Posts: 12,258
    edited April 2006
    Yup, and wasn't the saying "Nobody can hear you scream" out there? Leading me to the question, that if a tree fell down in outer space..........and there was nobody around to hear it..........if they were there to hear it.........would they hear it?




    I'm sure I could do 120db at 55Hz, but I'm not allowed to play with candles.
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  • neomagus00
    neomagus00 Posts: 3,899
    edited April 2006
    bikezappa wrote:
    Space, do you mean like outer space like in orbit? There is no air to move out there.
    well, in actual 'space', there's no air to allow something to burn, either... presumably they're talking about fires inside the ISS or shuttle or something...
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  • labrat
    labrat Posts: 120
    edited April 2006
    You got it, they mentioned that a conventional extingusher gets foam everywhere and recks the equipment. I assume they are looking at sound as it is less destructive.

    Anyone have any luck with soundwaves rather than port airflow?

    Scott
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