Apparatus and method for locatable encoding alarms
US5949328A · kind A · utility
Inventor
Key dates
| Filing date | Mar 3, 1995 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Mar 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Apparatus and method for locatable alarms which increase the awareness of and locatability of objects, even for sight or hearing impaired individuals. The apparatus emits preferably a plurality of intermittent complex multiple frequency encoded noises at ear intensities less than 150 dbA, when measured at 10 cm from the source, which enhance listeners' conscious or subconscious abilities to estimate both the distance to the object from the listeners and at least two relative angles between the listeners and the object. The plurality of intermittent complex multiple frequency encoded noises include noise having at least in part primary frequency less than about 1.1 KHz and noise having primary frequency in the range of from about 4 KHz through about 12 KHz. Additionally, the apparatus provides encoded light, preferably an encoded, near monochromatic, coherent, pulsed light of less than 5 milliwatt intensity having primary output wavelengths in the range of from about 380 nanometers through about 780 nanometers, the light emitted by the object being encoded with balanced and selected saturation purity, interference, chromaticity, pulse duration, luminous flux and coherence that enhan…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.