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Sound meter for Band ...mic?

Discussion in 'General Electronics Discussion' started by Russfireball, Jul 2, 2013.

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  1. Russfireball

    Russfireball

    2
    0
    Mar 25, 2013
    Hi all

    I have recently been working on a project for my band which is a sound pressure meter using a LM3914 logarithmic bar graph driver and a small condenser microphone ( the same as the one shown in the link at the bottom of the page). The system works but it can only pick up higher frequency noises at close proximity, and struggles to pick up deep sounds at all. For example if i was to shout right down the mic with the system held close to me then it would go off the scale yet if i was to play a very low frequency note on a bass guitar at high volume near the circuit nothing would happen

    I need a microphone that has a much higher sensitivity to low frequency noises as well as being able to pick up noises that are further away so that i can put the system near the back of a room when the band is playing. Can anyone point me in the right direction?

    Heres the link to the mic im currently using:

    http://uk.rs-online.com/web/p/condenser-microphone-components/7542107/

    Russ
     
  2. davenn

    davenn Moderator

    13,838
    1,952
    Sep 5, 2009
    hi Russ
    sorry for the late welcome

    condenser mics are relatively insensitive. you are going to need some good preamplifier circuitry following the mic and look into some bass boost as well

    I cannot offer specific suggestions, maybe others can :)

    Dave
     
  3. davenn

    davenn Moderator

    13,838
    1,952
    Sep 5, 2009
    OK
    a quick google search found this example.....

    [​IMG]

    dunno how different it is from what you have tried
    there are other relevant hits on google as well

    Dave
     

    Attached Files:

  4. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    652
    May 8, 2012
    I know Audio Guru from another forum. You know how my avatar makes me look like an old grump? Well he actually is! :D That fact doesn't disqualify his designs though. ;) He's really quite good and he's earned his handle..

    Chris
     
  5. davenn

    davenn Moderator

    13,838
    1,952
    Sep 5, 2009
    ohhh yeah prob the same other forum I know of lol

    yeah he is a grumpy ol' so and so hahaha

    Dave
     
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