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Acoustic Harassment Device
Acoustic harassment and acoustic deterrents are technologies used to keep animalsEncyclopedia of Marine Mammals edited by William F. Perrin, Bernd Wursig, J. G.M. Thewissen page 442 and in some cases humans away from an area. Applications of the technology are used to keep marine mammals away from aquaculture facilities and to keep birds away from certain areas (for instance in the vicinity of airports and blueberry fields). The devices have also been employed to keep marine mammals away from fishing nets. The devices are known as acoustic harassment devices (AHDs) and acoustic deterrent devices, which are smaller AHDs [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Mammal
Marine mammals are mammals that rely on marine ecosystems for their existence. They include animals such as cetaceans, pinnipeds, sirenians, sea otters and polar bears. They are an informal group, unified only by their reliance on marine environments for feeding and survival. Marine mammal adaptation to an aquatic lifestyle varies considerably between species. Both cetaceans and sirenians are fully aquatic and therefore are obligate water dwellers. Pinnipeds are semiaquatic; they spend the majority of their time in the water but need to return to land for important activities such as mating, breeding in the wild, breeding and molting. Sea otters tend to live in kelp forests and estuaries. In contrast, the polar bear is mostly terrestrial and only go into the water on occasions of necessity, and are thus much less adapted to aquatic living. The diets of marine mammals vary considerably as well; some eat zooplankton, others eat fish, squid, shellfish, or seagrass, and a few eat ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embassy
A diplomatic mission or foreign mission is a group of people from a Sovereign state, state or organization present in another state to represent the sending state or organization officially in the receiving or host state. In practice, the phrase usually denotes an embassy or high commission, which is the main office of a country's Diplomacy, diplomatic representatives to another country; it is usually, but not necessarily, based in the receiving state's Capital (political), capital city. Consulates, on the other hand, are smaller diplomatic missions that are normally located in major cities of the receiving state (but can be located in the capital, typically when the sending country has no embassy in the receiving state). In addition to being a diplomatic mission to the country in which it is located, an embassy may also be a non-resident permanent mission to one or more other countries. The term embassy is sometimes used interchangeably with Chancery (diplomacy), chancery, the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Directional Sound
Directional sound refers to the notion of using various devices to create fields of sound which spread less than most (small) traditional loudspeakers. Several techniques are available to accomplish this, and each has its benefits and drawbacks. Ultimately, choosing a directional sound device depends greatly on the environment in which it is deployed as well as the content that will be reproduced. Keeping these factors in mind will yield the best results through any evaluation of directional sound technologies. Systems which guide evacuees during an emergency by the emission of pink noise to the exits are often also called "directional sound" systems. Basic theory In all wave-producing sources, the directivity of any source, at maximum, corresponds to the size of the source compared to the wavelengths it is generating: The larger the source is compared to the wavelength of the sound waves, the more directional beam results . The specific transduction method has no impact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonic Weapon
Sonic and ultrasonic weapons (USW) are weapons of various types that use sound to injure or incapacitate an opponent. Some sonic weapons make a focused beam of sound or of ultrasound; others produce an area field of sound. , military and police forces make some limited use of sonic weapons. Use and deployment Extremely high-power sound waves can disrupt or destroy the eardrums of a target and cause severe pain or disorientation. This is usually sufficient to incapacitate a person. Less powerful sound waves can cause humans to experience nausea or discomfort. The possibility of a device that produces frequency that causes vibration of the eyeballs—and therefore distortion of vision—was suggested by paranormal researcher Vic Tandy in the 1990s while attempting to demystify a "haunting" in his laboratory in Coventry. This "spook" was characterised by a feeling of unease and vague glimpses of a grey apparition. Some detective work implicated a newly-installed extractor fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long Range Acoustic Device
A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control, which has caused permanent hearing damage, having an extremely high decibel capacity (up to 160 dB measured at one meter from the device). Other uses have included for negotiations in siege situations; to deal with piracy at sea; for mass notification during natural disasters or other emergencies; and by defense forces, including several navies. Overview Acoustic hailing devices are acoustic devices capable of outputting intelligible sound at very high volumes. The distance at which acoustic hailing can be effective varies based on several factors including the sound level, directionality, and frequency of the acoustic source, the sensitivity and directionality of the receiver, and the transmission channel environment. The sound level diminishes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Mosquito
The Mosquito or Mosquito alarm is a machine used to deter loitering by emitting sound at high frequency. In some versions, it is intentionally tuned to be heard primarily by younger people. Nicknamed "Mosquito" for the buzzing sound it plays, the device is marketed as a safety and security tool for preventing youths from congregating in specific areas. The latest version of the device, launched late in 2008, has two frequency settings, one of approximately 17.4 kHz that can generally be heard only by young people, and another at 8 kHz that can be heard by most people. The maximum potential output sound pressure level is stated by the manufacturer to be 108 decibels (dB) (comparable in loudness to a live rock concert) and the manufacturer's product specification furthermore states that the sound can typically be heard by people below 25 years of age. The ability to hear high frequencies deteriorates in most humans with age (a condition known as presbycusis), typically obser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waco, Texas
Waco ( ) is a city in and the county seat of McLennan County, Texas, United States. It is situated along the Brazos River and Interstate 35, I-35, halfway between Dallas and Austin, Texas, Austin. The city had a U.S. census estimated 2024 population of 146,608, making it the List of cities in Texas by population, 24th-most populous city in the state.Annual Estimates of the Resident Population for Incorporated Places of 50,000 or More, Ranked by July 1, 2022, Population: April 1, 2020, to July 1, 2023 (SUB-IP-EST2023-ANNRNK) Source: U.S. Census Bureau, Population Division Release Date: May 2024 The Waco metropolitan area, Waco metropolitan statistical area consists of McLennan, Falls and Bosque counties, which had a 2020 population of 295,782. Bosque County was added to the Waco MSA in 2023. The 2024 U.S. census population estimate for the Waco metropolitan area was 307,123 residents. History 1824–1865 Indigenous peoples occupied areas along the river for thousands of years. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waco Siege
The Waco siege, also known as the Waco massacre, was the siege by US federal government and Texas state law enforcement officials of a compound belonging to the religious cult known as the Branch Davidians, between February 28 and April 19, 1993. The Branch Davidians, led by David Koresh, were headquartered at Mount Carmel Center ranch in unincorporated McLennan County, Texas, 13 miles (21 kilometers) northeast of Waco, Texas, Waco. Suspecting the group of stockpiling illegal weapons, the Bureau of Alcohol, Tobacco, Firearms and Explosives, Bureau of Alcohol, Tobacco, and Firearms (ATF) obtained a search warrant for the compound and arrest warrants for Koresh and several of the group's members. The ATF had planned a sudden daylight raid of the ranch in order to serve these warrants. Any advantage of surprise was lost when a local reporter who had been tipped off about the raid asked for directions from a US Postal Service mail carrier who was coincidentally Koresh's brother-in-la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manuel Noriega
Manuel Antonio Noriega Moreno ( , ; February 11, 1934 – May 29, 2017) was a Panamanian dictator and military officer who was the ''de facto'' List of heads of state of Panama, ruler of Panama from 1983 to 1989. He never officially served as president of Panama, instead ruling as an unelected military dictator through puppet presidents. Amassing a personal fortune through drug trafficking operations by the Panamanian military, Noriega had longstanding ties with American intelligence agencies before the United States invasion of Panama, U.S. invasion of Panama removed him from power. Born in Panama City to a poor pardo family, Noriega studied at the Chorrillos Military School in Lima and at the Western Hemisphere Institute for Security Cooperation, School of the Americas. He became an officer in the Panamanian army, and rose through the ranks in alliance with Omar Torrijos. In 1968, Torrijos overthrew President Arnulfo Arias in a 1968 Panamanian coup d'état, coup. Norieg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama
Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and the Pacific Ocean to the south. Its capital and largest city is Panama City, whose metropolitan area is home to nearly half of the country's over million inhabitants. Before the arrival of Spanish Empire, Spanish colonists in the 16th century, Panama was inhabited by a number of different Indigenous peoples of Panama, indigenous tribes. It Independence Act of Panama, broke away from Spain in 1821 and joined the Republic of Gran Colombia, a union of Viceroyalty of New Granada, Nueva Granada, Ecuador, and Venezuela. After Gran Colombia dissolved in 1831, Panama and Nueva Granada eventually became the Republic of Colombia. With the backing of the United States, Panama seceded from Colombia in 1903, allowing the construction of the Panama Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holy See
The Holy See (, ; ), also called the See of Rome, the Petrine See or the Apostolic See, is the central governing body of the Catholic Church and Vatican City. It encompasses the office of the pope as the Bishops in the Catholic Church, bishop of the apostolic see, apostolic episcopal see of Diocese of Rome, Rome, and serves as the spiritual and administrative authority of the worldwide Catholic Church and Vatican City. Under international law, the Legal status of the Holy See, Holy See holds the status of a sovereign juridical entity. According to Sacred tradition, Catholic tradition and historical records, the Holy See was founded in the first century by Saint Peter and Paul the Apostle, Saint Paul. By virtue of the doctrines of Primacy of Peter, Petrine and papal primacy, papal primacy, it is the focal point of full communion for Catholics around the world. The Holy See is headquartered in, operates from, and exercises "exclusive dominion" over Vatican City, an independent c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
