Portable audible beacon

Details Portable audible beacon Portable audible beacon

1997-03-05

1999-04-27

Tong, Nina

Communications: electrical

Audible indication

34028605, 340321, 340326, 340539, 340573, G08B 300

Patent

active

058983635

ABSTRACT:
A portable audible beacon comprises a housing that encloses a signal generating means and an acoustic transducer. The signal generating means generates an oscillating signal that is periodically interrupted by a zero signal, where the fundamental frequency of the oscillating signal corresponds to a frequency of high auditory sensitivity to the human ear, where the frequency of interruption of the oscillating signal corresponds to a directionally discernible frequency to the human ear, and where the period of duration of each zero signal is less than or about the same as the period of duration of the oscillating signal between each zero signal. The acoustic transducer receives the signal from the signal generating means and converts it into sound. The portable audible beacon of the present invention achieves the combined advantages of power efficiency, auditory sensitivity, and directionality.

REFERENCES:
patent: 3638011 (1972-01-01), Bain et al.
patent: 3818428 (1974-06-01), Phipps et al.
patent: 3942176 (1976-03-01), Bright
patent: 3969720 (1976-07-01), Nishino
patent: 4090185 (1978-05-01), Patty
patent: 4241332 (1980-12-01), Farque
patent: 4254405 (1981-03-01), Wenzlaff
patent: 4283657 (1981-08-01), Gordon et al.
patent: 4287509 (1981-09-01), Beggs
patent: 4288784 (1981-09-01), Fusco
patent: 4468656 (1984-08-01), Clifford et al.
patent: 4499453 (1985-02-01), Right
patent: 4600914 (1986-07-01), Walsh
patent: 4631517 (1986-12-01), Ajland
patent: 4746912 (1988-05-01), Clifford et al.
patent: 4821026 (1989-04-01), Newson
patent: 4847589 (1989-07-01), Dobblins
patent: 4904982 (1990-02-01), Lieb et al.
patent: 4926159 (1990-05-01), Bartlett
patent: 4959637 (1990-09-01), Woods et al.
patent: 4967177 (1990-10-01), Nguyen
patent: 4980837 (1990-12-01), Nunn et al.
patent: 5012221 (1991-04-01), Neuhaus et al.
patent: 5028911 (1991-07-01), Wanat et al.
patent: 5075671 (1991-12-01), Livingston, III
patent: 5121096 (1992-06-01), Moore et al.
patent: 5132659 (1992-07-01), Kuo
patent: 5216418 (1993-06-01), Lenz et al.
patent: 5317305 (1994-05-01), Campman
patent: 5648753 (1997-07-01), Martin

Affiliated with

Also associated with

Rating

Portable audible beacon does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Portable audible beacon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable audible beacon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-688087