HarleyTalking
Page 1 of 2 12 LastLast
Results 1 to 10 of 17

Thread: Decibels

  1. #1
    Co-Founder Hobbit's Avatar

    Join Date
    Jul 2010
    Location
    Where ever the wheels take me
    Bike
    2012 Dyna Switchback and 86' FJ1200
    Posts
    8,041

    Decibels

    we all know our pipes are loud but how loud is LOUD Click here to enlarge

    ok for starts db's are not linear there logarythmic and as i aint no mathemeticain heres a re few scales for you to peruse

    Click here to enlarge

    Click here to enlarge
    Click here to enlarge
    IBA MEMBER 40172
    SYLO SYLBP

    I'm walking with Sophie tonight, She lives in the air that I breathe;
    I can't get it out of my mind, How you were left to bleed...
    Was it how you dressed?
    Or how you act?
    I can't believe, How they could act so violently,
    Without regret, , Well, we will not forget...

    We are the others, We are the cast outs,
    We're the outsiders, But you can't hide us,
    We are the others, We are the cast outs
    You're no longer on your own, If you feel mistreated, Torn and cheated,
    You're not alone, We are the others

  2. #2
    Adminstrator RumRunner's Avatar
    Asteroids Champion!
    Join Date
    Jul 2010
    Location
    MA
    Bike
    2010 Ultra
    Posts
    18,425
    So where's the kids with the stereo that is about to break their windows and sounds like crap on that chart? Click here to enlarge
    ~RumRunner

    2010 Ultra - Vivid Black; Stage III 103"; SE259e Cams; SERT; Dresser Duals; 4" Rineharts Click here to enlarge Click here to enlarge

    Click here to enlarge

  3. #3
    Co-Founder Hobbit's Avatar

    Join Date
    Jul 2010
    Location
    Where ever the wheels take me
    Bike
    2012 Dyna Switchback and 86' FJ1200
    Posts
    8,041
    between pick up truck and modified motorcycle LOL 90db is a lot less than my bike mine db at 108db Click here to enlarge
    Click here to enlarge
    IBA MEMBER 40172
    SYLO SYLBP

    I'm walking with Sophie tonight, She lives in the air that I breathe;
    I can't get it out of my mind, How you were left to bleed...
    Was it how you dressed?
    Or how you act?
    I can't believe, How they could act so violently,
    Without regret, , Well, we will not forget...

    We are the others, We are the cast outs,
    We're the outsiders, But you can't hide us,
    We are the others, We are the cast outs
    You're no longer on your own, If you feel mistreated, Torn and cheated,
    You're not alone, We are the others

  4. #4
    Adminstrator RumRunner's Avatar
    Asteroids Champion!
    Join Date
    Jul 2010
    Location
    MA
    Bike
    2010 Ultra
    Posts
    18,425
    Click here to enlarge Originally Posted by Hobbit Click here to enlarge
    between pick up truck and modified motorcycle LOL 90db is a lot less than my bike mine db at 108db Click here to enlarge
    Yeah, don't know what mine is, probably lower than 90, but there are quite a few around here that would be way off that chart.. Click here to enlarge
    ~RumRunner

    2010 Ultra - Vivid Black; Stage III 103"; SE259e Cams; SERT; Dresser Duals; 4" Rineharts Click here to enlarge Click here to enlarge

    Click here to enlarge

  5. #5
    Co-Founder Hobbit's Avatar

    Join Date
    Jul 2010
    Location
    Where ever the wheels take me
    Bike
    2012 Dyna Switchback and 86' FJ1200
    Posts
    8,041
    space shuttle is 140+db !!!! rock concert around 110db, jumbo 135db
    Click here to enlarge
    IBA MEMBER 40172
    SYLO SYLBP

    I'm walking with Sophie tonight, She lives in the air that I breathe;
    I can't get it out of my mind, How you were left to bleed...
    Was it how you dressed?
    Or how you act?
    I can't believe, How they could act so violently,
    Without regret, , Well, we will not forget...

    We are the others, We are the cast outs,
    We're the outsiders, But you can't hide us,
    We are the others, We are the cast outs
    You're no longer on your own, If you feel mistreated, Torn and cheated,
    You're not alone, We are the others

  6. #6
    Adminstrator RumRunner's Avatar
    Asteroids Champion!
    Join Date
    Jul 2010
    Location
    MA
    Bike
    2010 Ultra
    Posts
    18,425
    Rosie O'Donnell = 180db Click here to enlarge
    ~RumRunner

    2010 Ultra - Vivid Black; Stage III 103"; SE259e Cams; SERT; Dresser Duals; 4" Rineharts Click here to enlarge Click here to enlarge

    Click here to enlarge

  7. #7
    New Member Liaison Tom's Avatar

    Join Date
    Jul 2010
    Location
    south bend
    Bike
    09 ultra black
    Posts
    17,518
    Click here to enlarge Originally Posted by RumRunner Click here to enlarge
    Rosie O'Donnell = 180db Click here to enlarge
    ooooooooooooohh..';';';';'
    May I be "the least in the household of God."...

  8. #8
    CHARTER MEMBER Twisted's Avatar

    Join Date
    Jul 2010
    Location
    Atlanta Georgia USA
    Bike
    2008 Heritage Softail
    Posts
    2,650
    Need to add mother inlaw on there, she is around 90 to 110 dba on a god day..
    But I do love my mother inlaw, ask my wife she will tell you...HEHEHEHEHE!
    Click here to enlargeThe beatings will continue.......until morale improves! Click here to enlarge

  9. #9
    CHARTER MEMBER Glenalt's Avatar

    Join Date
    Jul 2010
    Location
    Lexington SC
    Bike
    2010 Ultra Limited
    Posts
    2,120
    Here is what I learned in school about sound and dba measurements where the sound volume doubles with just 3dba difference. Pulled the following example off internet.


    Definition and examples
    The decibel (dB) is used to measure sound level, but it is also widely used in electronics, signals and communication. The dB is a logarithmic unit used to describe a ratio. The ratio may be power, sound pressure, voltage or intensity or several other things. Later on we relate dB to the phon and the sone (units related to loudness). But first, to get a taste for logarithmic units, let's look at some numbers. (If you have forgotten, go to What is a logarithm?)

    For instance, suppose we have two loudspeakers, the first playing a sound with power P1, and another playing a louder version of the same sound with power P2, but everything else (how far away, frequency) kept the same.

    The difference in decibels between the two is defined to be

    10 log (P2/P1) dB where the log is to base 10.
    If the second produces twice as much power than the first, the difference in dB is
    10 log (P2/P1) = 10 log 2 = 3 dB.

    If the second had 10 times the power of the first, the difference in dB would be
    10 log (P2/P1) = 10 log 10 = 10 dB.

    If the second had a million times the power of the first, the difference in dB would be
    10 log (P2/P1) = 10 log 1,000,000 = 60 dB.

    This example shows one feature of decibel scales that is useful in discussing sound: they can describe very big ratios using numbers of modest size. But note that the decibel describes a ratio:
    2010 Ultra Limited Merlot/Cherry Red

  10. #10
    CHARTER MEMBER Twisted's Avatar

    Join Date
    Jul 2010
    Location
    Atlanta Georgia USA
    Bike
    2008 Heritage Softail
    Posts
    2,650
    Click here to enlarge Originally Posted by Glenalt Click here to enlarge
    Here is what I learned in school about sound and dba measurements where the sound volume doubles with just 3dba difference. Pulled the following example off internet.


    Definition and examples
    The decibel (dB) is used to measure sound level, but it is also widely used in electronics, signals and communication. The dB is a logarithmic unit used to describe a ratio. The ratio may be power, sound pressure, voltage or intensity or several other things. Later on we relate dB to the phon and the sone (units related to loudness). But first, to get a taste for logarithmic units, let's look at some numbers. (If you have forgotten, go to What is a logarithm?)

    For instance, suppose we have two loudspeakers, the first playing a sound with power P1, and another playing a louder version of the same sound with power P2, but everything else (how far away, frequency) kept the same.

    The difference in decibels between the two is defined to be

    10 log (P2/P1) dB where the log is to base 10.
    If the second produces twice as much power than the first, the difference in dB is
    10 log (P2/P1) = 10 log 2 = 3 dB.

    If the second had 10 times the power of the first, the difference in dB would be
    10 log (P2/P1) = 10 log 10 = 10 dB.

    If the second had a million times the power of the first, the difference in dB would be
    10 log (P2/P1) = 10 log 1,000,000 = 60 dB.

    This example shows one feature of decibel scales that is useful in discussing sound: they can describe very big ratios using numbers of modest size. But note that the decibel describes a ratio:
    Is there going to be a test on this in the am? I think I am going to be sick tomorrow!Click here to enlarge
    Click here to enlargeThe beatings will continue.......until morale improves! Click here to enlarge

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

HarleyTalking.com is a privately owned internet discussion forum and is not affiliated with, endorsed by, or sponsored by Harley Davidson, Inc in any way. The Harley Davidson names and logos are trademarks owned by Harley-Davidson, Inc.