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238000006011 modification reaction Methods 0.000 description 2.238000005859 coupling reaction Methods 0.000 description 4. ![]() 238000006722 reduction reaction Methods 0.000 description 8.230000005540 biological transmission Effects 0.000 claims 2.230000001276 controlling effect Effects 0.000 claims description 8.238000007493 shaping process Methods 0.000 claims description 32.230000003247 decreasing Effects 0.000 claims abstract description 26.239000002131 composite material Substances 0.000 claims abstract description 54.230000000873 masking Effects 0.000 claims abstract description 136.230000005236 sound signal Effects 0.000 claims abstract description 216.Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links ![]() SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LUNDY, RENE R., TYLER, DAVID L. 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 PROACTIVE SYSTEMS Inc filed Critical PROACTIVE SYSTEMS Inc Priority to US06/210,645 priority Critical patent/US4395600A/en Application granted granted Critical Publication of US4395600A publication Critical patent/US4395600A/en Assigned to PROACTIVE SYSTEMS, INC. Original Assignee PROACTIVE SYSTEMS Inc 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.) Tyler 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 - Lifetime Application number US06/210,645 Inventor Rene R. Google Patents Auditory subliminal message system and methodÄownload PDF Info Publication number US4395600A US4395600A US06/210,645 US21064580A US4395600A US 4395600 A US4395600 A US 4395600A US 21064580 A US21064580 A US 21064580A US 4395600 A US4395600 A US 4395600A Authority US United States Prior art keywords signal amplitude audio signals subliminal message ambient audio Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4395600A - Auditory subliminal message system and method US4395600A - Auditory subliminal message system and method
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