| To: | Discussion of Ten-Tec Equipment <tentec@contesting.com> |
|---|---|
| Subject: | Re: [TenTec] 400 Hz CW |
| From: | Ken Brown <ken.d.brown@verizon.net> |
| Reply-to: | Discussion of Ten-Tec Equipment <tentec@contesting.com> |
| Date: | Sat, 04 Mar 2006 10:29:17 -1000 |
| List-post: | <mailto:tentec@contesting.com> |
In general we do loose hearing in the upper end of the audio spectrum as we age.Low frequency audio into the ear canal is a bit like VHF RF into a microwave waveguide. Energy transfer from outside to the ear drum is no doubt much more efficient at higher audio frequencies. |
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