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Signal noise ratio RODE NTG2 & AT AT875R

Discussion in 'Microphones' started by Nabulas, Jul 30, 2009.

  1. Nabulas

    Nabulas Guest

    Hello!
    I would like to know which shotgun mic is more noisy (self noise) in practise?


    Here are some specs:

    1.AUDIO TECHNICA AT 875 R
    with signal noise ratio 74 db
    sensivity 30mv/pa

    2. RODE NTG2
    with signal noise ratio 76 db
    sensivity 15mv/pa


    Lets take look at sensivity. So we need to double signal from RODE (so increase noises a lot) to achieve as good results in signal level as AT right? So theorytical RODE is a lot more noisy? Or im wrong?
     
  2. TheJackAttack

    TheJackAttack Distinguished Member

    If you are needing a shotgun mic for the traditional reasons, the little bit of self noise you are theorizing about isn't even a factor.
     
  3. BRH

    BRH Active Member

    The Audio Technica will appear to be quieter, as it has a higher output.
    It requirers phantom power, but the Rode will run on battery or phantom.

    You will turn up your mic preamp more with the Rode...and it's not double.
    You will have other issues before noticing any mic or preamp noise with either mic.. like room sound or ambient noise.
    Are you mounting on a camera?, as both are short camera mount shotguns. What camera?
     
  4. Nabulas

    Nabulas Guest

    I would like to record quiet audio like nature, so self noise is a very important factor. I have a good recorder so i dont care about preamp noise. Yes i know that those mics are not good enough to do crystal clear field recording but i have low budget and i must choose one of those.
     
  5. Boswell

    Boswell Moderator Distinguished Member

    Whatever you think, you really do need to care about pre-amp noise. The quieter of your two mics (the AT875R) is specified at 74dB SNR at 1KHz ref 1Pa SPL and a sensitivity of 31.6mV at 1Pa. This works out at a noise level of about 6uV r.m.s., which is very much in the area where you would hear the input stage noise of many commercial pre-amps.
     

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