![]() ![]() ![]() a pulsed RF carrier could be encoded with an amplitude modulated (“AM”) envelope.Below the threshold level, the click cannot be heard. the Radio Frequency (“RF”) Hearing Effect was first noticed during World War II as a subjective “click” produced by a pulsed radar signal when the transmitted power is above a “threshold” level.This invention relates to the modulating of signals on carriers, which are transmitted and the signals intelligibly recovered, and more particularly, to the modulation of speech on a carrier and the intelligible recover of the speech by means of the Radio Frequency Hearing Effect.H04B1/68- Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00 Details of transmission systems not characterised by the medium used for transmission for wholly or partially suppressing the carrier or one side band.H04B1/00- Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00 Details of transmission systems not characterised by the medium used for transmission.A61N1/08- Arrangements or circuits for monitoring, protecting, controlling or indicating.A61N1/00- Electrotherapy Circuits therefor.A61N- ELECTROTHERAPY MAGNETOTHERAPY RADIATION THERAPY ULTRASOUND THERAPY. ![]() A61- MEDICAL OR VETERINARY SCIENCE HYGIENE.Priority to US10/131,626 priority patent/US6587729B2/en Application granted granted Critical Publication of US6470214B1 publication Critical patent/US6470214B1/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Assigned to UNITED STATES AIR FORCE reassignment UNITED STATES AIR FORCE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by US Air Force filed Critical US Air Force Priority to US08/766,687 priority Critical patent/US6470214B1/en Assigned to AIR FORCE, UNITED STATES reassignment AIR FORCE, UNITED STATES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee US Air Force Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Loree Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US08/766,687 Inventor James P. Google Patents Method and device for implementing the radio frequency hearing effectĭownload PDF Info Publication number US6470214B1 US6470214B1 US08/766,687 US76668796A US6470214B1 US 6470214 B1 US6470214 B1 US 6470214B1 US 76668796 A US76668796 A US 76668796A US 6470214 B1 US6470214 B1 US 6470214B1 Authority US United States Prior art keywords signal output signal carrier modulation speech Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US6470214B1 - Method and device for implementing the radio frequency hearing effect US6470214B1 - Method and device for implementing the radio frequency hearing effect
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