Interesting Old Patents

A patent that allows ultrasonic inaudible sound to be used as part of presentations and to monitor the reactions

Silent Subliminal Presentation System

Metadata

Patent Number: 5159703

Patent Date: Oct. 27, 1992

Added to IOP: May 15, 2024, 12:34 a.m.

Short Description

I think this is related to the discovery that ultrasound can cause resonating vibrations in the ears by vibrating the target with inaudible ultrasound. Sound appears to be coming from inside you.

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