mics off axis responce

Discussion in 'Microphones (live or studio)' started by robertmetal, Apr 23, 2006.

  1. robertmetal

    robertmetal Guest

    hello there. i put another post similar to this one up before but this one is more specific.

    if a handheld vocal mic has a polar chart like this one

    http://www.audio-technica.com/cms/wired_mics/b8f2c39b7aa5fc9 c/index.html

    (if the link doent work its the audio-technia ae6100)


    is it not giving a false reading of its off axis rejection as it has an added ring(worth 5db's)? because with the added ring your not actually counting directly from its on axis point at 0%
    i.e. at 120% and at 1kHz the mic is not 30 db's down but in fact 25 ?(minus the added ring)

    if so is it the same case with this mic

    Sound Devices MP1
    (if link doesnt work its the audix om5)


    at 2000Hz the mic isnt down by 30db's but 25 for the same reason as the first mic polar chart?

    much thanks,R :)
  2. robertmetal

    robertmetal Guest

    oops just realised that yhe other post i put up basically is the same as this one. would still be cool to get more opions tho. thanks
  3. Kev

    Kev Well-Known Member

    Nov 13, 2001

    Sound Devices MP1

    the added ring you refer to is the extention of the scale
    the scale is relative
    relative to the on axis and 1k reading
    you could argue that the +5dB ring is of no value ... for this mic
    but it may contain data for other types of mics

    that extra ring is the +5dB scale and the main reference ring is 0dB and then comes -5 - 10 -15 etc ...

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