1. Register NOW and become part of this fantastic knowledge base forum! This message will go away once you have registered.

See an ancient test eqipment !!

Discussion in 'Microphones' started by Big K, Feb 21, 2011.

  1. Big K

    Big K Well-Known Member

    See an ancient test equipment !!

    Hallo,
    A few days ago I saw this little device and had to take a wild guess what it actually was.
    After some research I found out:

    It is a Siemens microphone test device. No plug and no lead is going in or out, but when you turn it over it makes a rattling noise like a rain maker with larger grains in it. Little steel balls patter on the speaker-cone-like membrane for an extended even-leveled 94 dB noise floor. You place it exactly 10 cm infront of the microphone's membrane for calibrating mics or pre-amps.

    Do you have an old or unknown and rare gadget, too?
    Feel free to post it here, as well...

    :smile:

    BILD0635.jpg BILD0634.jpg BILD0633.jpg
    Siemens Eichtonquelle Click on me!
     
  2. moonbaby

    moonbaby Mmmmmm Well-Known Member

    Cool device! I often wondered how manufacturers tested the sensitivity of their mics, what a great concept. Sure beats the heck out of having Hans standing in front of the mic and reciting the Gettysburg Address...:)
     
  3. Davedog

    Davedog Distinguished Member

    Is Hans getting off-stage cues from Gretel?
     
  4. moonbaby

    moonbaby Mmmmmm Well-Known Member

    Yeah, that would make it the "Gretel's First Address", wouldn't it?
    DD...I haven't forgotten ya, just waiting on the 2nd opinion...
     
Similar Threads
  1. Luke Walchuk
    Replies:
    11
    Views:
    3,759
  2. doulos21
    Replies:
    5
    Views:
    1,162
  3. doulos21
    Replies:
    0
    Views:
    955
  4. blueorange
    Replies:
    1
    Views:
    789
  5. DonnyThompson
    Replies:
    12
    Views:
    1,059
Loading...

Share This Page