[Elecraft] [K3] Hearing aids, meet K3

[Ron D'Eau Claire]

Certainly true for youngsters. As a teen, I could easily hear TV sweep
oscillators (16 kHz). But it's all literally down-hill (or down-frequency)
from there, especially those of us d were exposed to a lot of nearby weapons
firing in the military. You don't wear ear protectors in the Army.

I recall my hearing at the band of frequencies produced by a 30 caliber
round being fired becoming so suppressed that each time I squeezed the
trigger on my M1 rifle that I could hear every nuance of the bolt moving as
it automatically chambered each round. 

The result is both a severe roll off of higher frequency sensitivity, lots
of holes throughout one's hearing range, and chronic tinnitus. 

Back in the 60's the Army said that was "normal hearing" for a 20-something
year old soldier. It's an experience one doesn't forget; my ears still ring,
literally.  

73, Ron AC7AC


-----Original Message-----

As I recall from my broadcasting classes years ago, human speech has a
"typical" bandwidth of just 3KHz. "Normal" human hearing, IIRC, picks up
frequencies from 20Hz to 20KHz.

If someone has a copy of Schrader's "Electronic Communications" ready to
hand, the specifics should be in there somewhere.

 - -
73 de N5ILN
Alan