Patent ID: 8031058
Filing Date: 2011-10-04
Classification: A01M

Abstract:
1. A method for dispersing a first group of people in a human population from a fixed location and preventing the first group of people from loitering in the fixed location, comprising: mounting a sound-emitting device to a permanent structure at the fixed location, said sound-emitting device including oscillating means for generating a signal and sounding means for generating and emitting sound in accordance with said signal; wherein the sound generated and emitted by said sounding means of said sound-emitting device consists essentially of sound waves in a predetermined frequency band that is no more than 2 kHz in width and encompasses 16.5 kHx, said predetermined frequency band of the sound waves being audible to said first group of people in the human population and substantially inaudible to a second group of people in the human population, whereby said sound emitted by said sounding means of said sound-emitting device operates to disperse said first group of people from said fixed location and to prevent said first group of people from loitering in said fixed location.