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The Long Range Acoustic Device (LRAD) is a crowd control and hailing device developed by LRAD Corporation.
According to the manufacturer's specifications, the equipment weighs 45 pounds (20 kg) and can emit sound in a 30° beam (only at high frequency, 2.5 kHz) from a device 83 centimetres (33 in) in diameter. At maximum level, it can emit a warning tone that is 146 dBSPL (1,000 W/m2) at 1 metre. The maximum usable design range extends to 300 metres. At 300 metres, the warning tone (measured) is less than 90 dB.
TextLRAD systems support renewable energy installations by protecting perimeters from trespassing, asset theft and vandalizing, while also preserving wildlife by deterring their incursions. LRAD systems can potentially save renewable energy companies from millions of dollars in annual losses as a result of wildlife-related equipment damage. At distances in excess of 1000 meters, LRAD is highly effective using focused acoustic output to clearly transmit intense, directional sounds in a variety of tones and predator calls to deter birds and waterfowl from flying through or landing in control zones.
Wind and solar farms, nuclear power facilities, mining and agricultural operations and other industries and critical facilities that have wildlife preservation concerns can benefit from LRAD’s unique long range, directed sound capability.
LRAD-RX with radar guidance can scatter birds and bats before they enter wind farms. Additionally, this system also provides perimeter security by creating a virtual fence.
LRAD-RX is being used successfully with avian radar to prevent bird landings and wildlife incursions into hazardous water and waste areas.
Airports & Runways
LRAD can be manually operated or integrated into remotely controlled command and control centers. LRAD 1000X™ systems are being integrated with avian radar technology to provide a bio-acoustic deterrent for bird and waterfowl control and protection to prevent potentially catastrophic aircraft bird strikes. The avian radar system locates birds entering control zones and then activates LRAD to humanely deter birds from flying or landing within these restricted areas.
Vineyard / Agricultural Protection
LRAD systems help protect wildlife and save agricultural operations from substantial losses due to wildlife-related crop damage. At distances in excess of 1000 meters, LRAD transmits intense, directional sounds in a variety of tones and predator calls to humanely deter birds and other wildlife from destroying crops and property.
Originally posted by butcherguy
I heard something interesting on C to C either last night or the night before. The birds in Arkansas were reported to have fell from the sky at night. Whoever it was speaking on the show rightfully asked, "Why were these birds flying at night?"
These were blackbirds. You might find owls, whipoor-wills, goatsuckers or nightjars flying at night, but not blackbirds.
still, these birds suffered intense internal injuries.....would that cause that?
A more potent weapon under development in Russia since the early 1990s is a high powered very low frequency (VLF) modulator. Operating at frequencies below 20 KHz, the device requires a 1-2 meter dish to project a so-called "acoustic bullet." The device was attractive because the power level is adjustable. At low power, the system would cause physical discomfort, while increasing the power could induce nausea, vomiting and abdominal pains. The highest levels can cause a person's bones to resonate, which can be quite painful.
Originally posted by alchemist2012
i am not very familiar with bird types but seems like it has crossed species into starlings now
An estimated 2 million fish have been reported dead from the Bay Bridge south to Tangier Sound, according to the Maryland Department of the Environment, which investigates fish kills. The dead fish are primarily adult spot, with some juvenile croakers.
Originally posted by alchemist2012
reply to post by Honor93
just read an article about dead fish in florida