United States Patent
US Patent 6587729: Apparatus for audibly communicating speech using…
US 6587729 · granted 2003-07-01
| Patent Number | 6587729 |
|---|---|
| Title | Apparatus for audibly communicating speech using the radio frequency hearing effect |
| Filed | 2002-04-24 |
| Granted | 2003-07-01 |
| Inventor(s) | James P. O’Loughlin, Diana L. Loree |
| Assignee | United States Department of the Air Force |
| CPC Classification | H04B1/00, A61N1/02, A61N1/08 |
| Number of Claims | 1 |
Abstract
A modulation process with a fully suppressed carrier and input preprocessor filtering to produce an encoded output; for amplitude modulation (AM) and audio speech preprocessor filtering, intelligible subjective sound is produced when the encoded signal is demodulated using the RF Hearing Effect. Suitable forms of carrier suppressed modulation include single sideband (SSB) and carrier suppressed amplitude modulation (CSAM), with both sidebands present.
Claims Summary
1. An apparatus for communicating an audio signal a(t), comprising:
Inventors
Assignee
United States Department of the Air Force