OK. I used the word incorrectly. Thanks for pointing that out.
73, Mike KK7ER
-Original Message-
From: Jim Brown [mailto:k...@audiosystemsgroup.com]
Sent: Friday, April 26, 2019 11:33 AM
To: wsjt-devel@lists.sourceforge.net
Subject: [wsjt-devel] Acoustic vs. Audio Frequency
On 4/26/2019 11:14 AM, Deisher, Michael wrote:
> I realized that just after pressing send. The 90Hz bandwidth (I call
> it acoustic bandwidth since it is encoded as a PCM audio signal)
You're confusing the vibration of air with an electrical signal at audio
frequencies. The word "acoustic" and the science of acoustics apply to the
pressure waves in air or some other medium (like water), NOT in an electrical
circuit.
The signal generated and decoded by WSJT-X, and other software, is an audio
frequency signal. It takes a loudspeaker or earphones to convert that
electrical signal to pressure waves that we can hear. Humans can hear these
pressure waves vibrating at frequencies between about 20 Hz and 20 kHz.
73, Jim K9YC
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