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 preamps .
Do you have an old or unknown and rare gadget, too?
Feel free to post it here, as well...
:smile:
Siemens Eichtonquelle Click on me!
Comments
Cool device! I often wondered how manufacturers tested the sensi
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...:)
Is Hans getting off-stage cues from Gretel?
Is Hans getting off-stage cues from Gretel?
Yeah, that would make it the "Gretel's First Address", wouldn't
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...