Active non-lethal avian denial infrasound systems and methods of avian denial

Abstract

An active non-lethal infrasound system for denying all bird species access to critical areas, particularly in areas around aircraft and other high value systems. The system comprises a plurality of infrasound generators broadcasting continuous infrasonic signals to create a bird-free infrasound active zone within the perimeters of the protected critical area and an infrasound-free dead zones for birds being denied access to the critical areas. Further, an active infrasonic barrier is assembled within an exclusion area surrounding the bird-free infrasound active zone to dampen all low frequency sound waves emanating from the critical area and its perimeters. Wherever the situation allows, a wildlife sanctuary is preferably established further from the exclusion area to attract and protect birds, enforced by broadcasting infrasound signals that simulate natural sounds that attract species typical of the geographic location.

1 . An active non-lethal infrasound system for denying birds access to predetermined areas, comprising:
 a plurality of in-phase infrasound generators that radiate a plurality of constructive interference patterns of infrasonic waves to create an infrasound active zone that is bird-free; and   a plurality of out-of-phase infrasound generators that radiate a plurality of destructive interference patterns of infrasonic waves to create one or more infrasound-free dead zones, which are outside the domain of the predetermined areas and which provide a refuge for birds being repelled from the infrasound active zone.   
     
     
         2 . The active non-lethal infrasound system of  claim 1 , wherein the constructive interference patterns of infrasonic waves mimic a plurality of navigational cues and natural weather conditions that repel birds from the infrasound active zone. 
     
     
         3 . The active non-lethal infrasound system of  claim 1 , wherein the infrasound active zone is positioned within an airspace portion of an airfield. 
     
     
         4 . The active non-lethal infrasound system of  claim 3 , further comprising a barren exclusion zone that is created around the infrasound cancellation barrier and surround the infrasound active zone. 
     
     
         5 . The active non-lethal infrasound system of  claim 4 , wherein the barren exclusion zone is deprived of any avian life-sustenance amenities and constitutes a no-fly bird zone and is not connected to the at least two or more infrasound-free dead zones. 
     
     
         6 . The active non-lethal infrasound system of  claim 4 , wherein the barren exclusion zone comprises a plurality of quieting infrasound generators that radiate a plurality of signals for cancelling the plurality of continuous and intermittent infrasound signals radiating at the perimeter of the infrasound active zone. 
     
     
         7 . The active non-lethal infrasound system of  claim 3 , wherein the infrasound active zone is expanded to encompass all areas in an airport including critical areas around aircraft and other high value systems. 
     
     
         8 . An active non-lethal infrasound system for denying birds' access to predetermined areas, comprising:
 a plurality of in-phase infrasound generators that radiate a plurality of continuous and intermittent infrasound signals to create an infrasound active zone, which is bird-free; and   a plurality of quieting infrasound generators that radiate a plurality of signals that cancel the plurality of continuous and intermittent infrasound signals radiating at the perimeter of the infrasound active zone to create an infrasound cancellation barrier for controlling the spread of infrasound signals outside the perimeters of the infrasound active zone.   
     
     
         9 . The active non-lethal infrasound system of  claim 8 , wherein the infrasound active zone is positioned within an airspace portion of an airfield. 
     
     
         10 . The active non-lethal infrasound system of  claim 9 , further comprising a plurality of out-of-phase infrasound generators that radiate a plurality of destructive interference patterns of infrasonic waves to create at least two or more infrasound-free dead zones. 
     
     
         11 . The active non-lethal infrasound system of  claim 10 , wherein the infrasound-free dead zones are outside the domain of the predetermined areas, located at opposite sides of the infrasound active zone and extended to cover large spaces. 
     
     
         12 . The active non-lethal infrasound system of  claim 11 , wherein one of the extended infrasound-free dead zones constitutes a bird sanctuary that is furnished with feed, water, grass, seedlings and bushes to provide a refuge for birds being denied access to the infrasound active zone. 
     
     
         13 . The active non-lethal infrasound system of  claim 12 , further comprises a plurality of infrasound generators that mimic the mating calls of a plurality of birds species of interest. 
     
     
         14 . The active non-lethal infrasound system of  claim 9 , wherein the infrasound active zone is expanded to encompass all areas in the airport including critical areas around aircraft and other high value systems. 
     
     
         15 . An active non-lethal infrasound system for denying birds access to predetermined areas, comprising:
 a plurality of pulsating infrasound generators that comprise a row of small acoustic elements that are pulsed one by one in a sequence along a row to create a pattern of constructive interference signals that collimate in a beam at a set angle thereby creating a plurality of infrasound active zones, leaving a plurality of infrasound-free dead zones in its wake, safe and comfortable for birds to seek a refuge; and   a plurality of avian infrasound generators broadcasting a plurality of continuous and intermittent infrasound signals that deter birds from approaching the plurality of infrasound active zones that are bird-free.   
     
     
         16 . The active non-lethal infrasound system of  claim 15 , further comprising a plurality of infrasound detectors capable of detecting the presence of birds within the proximity of predetermined areas and working in concert with a plurality of radars. 
     
     
         17 . An active non-lethal method for denying birds access to predetermined areas, comprising:
 providing a plurality of in-phase infrasound generators;   radiating a plurality of constructive interference patterns of infrasonic waves;   providing a plurality of out-of-phase infrasound generators; and   radiating a plurality of destructive interference patterns of infrasonic waves outside the domain of the airstrips and runways;   wherein radiating said plurality of constructive interference patterns of infrasonic waves creates an infrasound active zone that is bird-free and radiating said plurality of destructive interference patterns of infrasonic waves creates one or more infrasound-free dead zones which provide a refuge for birds being repelled from the infrasound active zone.   
     
     
         18 . The active non-lethal method for denying birds access to predetermined areas of  claim 17 , wherein said predetermined areas are within an airspace portion of an airfield. 
     
     
         19 . An active non-lethal method for denying birds access to predetermined areas, comprising:
 providing a plurality of in-phase infrasound generators;   radiating a plurality of continuous and intermittent infrasound signals to create an infrasound active zone;   providing a plurality of quieting infrasound generators; and   radiating a plurality of signals that cancel the plurality of continuous and intermittent infrasound signals radiated at the perimeter of the infrasound active zone;   wherein radiating the plurality of continuous and intermittent infrasound signals creates an infrasound active zone, and radiating the plurality of signals that cancel the plurality of continuous and intermittent infrasound signals radiated at the perimeter of the infrasound active zone creates an infrasound cancellation barrier for controlling the spread of infrasound signals outside the perimeters of the infrasound active zone.   
     
     
         20 . The active non-lethal method for denying birds access to predetermined areas of  claim 19 , wherein said predetermined areas are within an airspace portion of an airfield. 
     
     
         21 . An active non-lethal method for denying birds access to predetermined areas, comprising:
 providing a plurality of pulsating infrasound generators comprising a row of small acoustic elements;   pulsing said plurality of pulsating infrasound generators one by one in a sequence along a row to create a pattern of constructive interference signals that collimate in a beam at a set angle;   providing a plurality of avian infrasound generators; and   broadcasting a plurality of continuous and intermittent infrasound signals that deter birds from approaching the plurality of infrasound active zones that are bird-free;   wherein pulsing said plurality of pulsating infrasound generators one by one in a sequence creates a plurality of infrasound active zones, leaving a plurality of infrasound-free dead zones in its wake, and broadcasting said plurality of continuous and intermittent infrasound signals deters birds from approaching said plurality of infrasound active zones.   
     
     
         22 . The active non-lethal method for denying birds access to predetermined areas of  claim 21 , wherein said predetermined areas are within an airspace portion of an airfield.