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What does dBA mean in acoustics and what does the A stand for in the dBA unit?

Granat :) 22842 7
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  • #1 2803572
    Granat :)
    Level 34  
    Hello,

    I am looking and somehow no one knows :)
    What does "dBA" mean? It is probably about the acoustic intensity, but what does the letter "A" at the end of the unit have to do with it? :)

    Regards, please reply.
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  • #2 2803710
    Quarz
    Level 43  
    Hello,
    Granat :) wrote:
    Hello,

    I am looking and somehow no one knows :)
    What does "dBA" mean? It is probably about the acoustic intensity, but what does the letter "A" at the end of the unit have to do with it? :)

    Regards, please reply.

    Google must be created: http://www.google.com/webhp?sourceid=navclient&ie=UTF-8 " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://www.google.com/webhp?sourceid=navclient&ie=UTF-8 .... ruullleeeezzzzz(R) (C) by GregBa
    and enter a good keyword, you will easily find:
    http://pl.wikipedia.org/wiki/Poziom_nat%C4%99%C5%BCenia_d%C5%BAwi%C4%99ku " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://pl.wikipedia.org/wiki/Poziom_nat%C4%99%C5%BCenia_d%C5%BAwi%C4%99ku
    http://www.ear.info/pl/Page.asp?PageNumber=410 " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://www.ear.info/pl/Page.asp?PageNumber=410
    http://www.peltor.se/pl/page.asp?pagenumber=443 " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://www.peltor.se/pl/page.asp?pagenumber=443

    Enjoy reading :D

    Regards
    Greg
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  • Helpful post
    #3 2807758
    Paweł Es.
    VIP Meritorious for electroda.pl  
    dBA or dB (A) is the relative level in decibels but scaled according to a normalized weighting curve corresponding to the inverse sensitivity curve of the human ear at different frequencies.

    The point is that the measuring device should show more or less the signal level corresponding to the listener's impressions.

    The curve is used when testing the device with a single tone of varying frequency.

    http://www.lindos.co.uk/cgi-bin/FlexiData.cgi?SOURCE=Articles&VIEW=full&id=2
  • #4 2807968
    Granat :)
    Level 34  
    well now I know it in general :)
    but I have another question ...
    if I have, for example, a source that generates 90dB, how many such sources do you need to produce a total of 110dB? :D
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  • #5 2807994
    cikol
    Level 27  
    If I have a good understanding, there are 7 such sources.
  • #6 2808011
    Granat :)
    Level 34  
    about 3dB increases adding one probably ... but I don't know if it's true :)
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  • Helpful post
    #7 2808076
    Quarz
    Level 43  
    Hello,
    Granat :) wrote:
    well now I know it in general :)
    but I have another question ...
    if I have, for example, a source that generates 90dB, how many such sources do you need to produce a total of 110dB? :D

    since it is power, each 3dB doubles the level.
    The difference is: 110dB - 90dB = 20dB, that is
    20dB / 3dB ==> 7 because it must be a natural number :D

    Regards
    Greg
  • #8 2808085
    Granat :)
    Level 34  
    yeah ok thanks :D
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Topic summary

The discussion centers around the meaning of "dBA," which refers to decibels adjusted with an A-weighting filter that reflects the human ear's sensitivity to different frequencies. This adjustment allows for a more accurate representation of perceived sound levels. Participants also engage in a follow-up question regarding sound intensity, specifically how many sound sources generating 90dB are needed to achieve a total of 110dB. The consensus is that approximately seven sources are required, based on the principle that every 3dB increase corresponds to a doubling of sound power.
Summary generated by the language model.
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