[Milsurplus] Carbon mics, more.....

[Michael Hanz]

Yup.  Though it seems inconceivable that we entered the war with that 
throat mic as a mainstay of aircraft intercommunication, a Bell 
Laboratories engineering analysis described it as "/a good idea but for 
the fact that the sound available from the larynx is basically 
unintelligible/".  It wasn't until 1942ish that Bell Labs was finally 
called upon to do some intelligibility research of various commonly used 
microphones and earphones in a noisy environment.  A lot of good 
products came about as a result, and were recorded for posterity in one 
of the NDRC reports (Division 17, Combat Instrumentation) that was 
issued at the end of the war.  One of the best products was the 
repurposing of the T-45 as the basis for the first boom mic headset, the 
H-46.  (The T-45 at least was a true noise cancelling design...it was 
just infernally uncomfortable, especially if you had a moustache...)

  - Mike  KC4TOS

On 5/30/2016 2:29 AM, WA5CAB--- via Milsurplus wrote:
> Yeah, that seems to be the common opinion.  Some years ago, I was 
> supplying a couple of vehicle collectors with accessories to outfit a 
> Stuart and despite my trying to tell them, they insisted on getting 
> T-30's.  About two weeks later, one of them called and said "these 
> things sound bloody awful!!!".  So I sold them some T-45's and they 
> were happy.
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>
> In a message dated 05/30/2016 01:05:13 AM Central Daylight Time, 
> duvallddennis at gmail.com writes:
>> Put a throat mic on the air a while back.  Wrapped around my neck, at 
>> least, sounded bloody awful!
>>
>> Dennis D.  W7QHO
>> Glendale, CA
>>
>
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20160530/174f42f9/attachment.html>