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Rumbler (siren)
A Rumbler siren is a type of emergency vehicle siren used primarily in the United States. Developed in 2007 by Federal Signal Corporation, and sounding at a low-frequency level, it is designed to be heard by motorists who may otherwise be unable to hear high-frequency sirens due to ambient noise, such as urban traffic. Design The Rumbler produces a pulsating, low-frequency sound between 182 to 400 hertz, and is operated in tandem with a standard, piercing high-frequency siren. The lower frequency sound penetrates hard surfaces like glass and doors more effectively than high-frequency tones. In addition, the siren's low-frequency thumping sound also causes noticeable vibrations to drivers and pedestrians who are near it and helps to generate attention in high-noise environments like "dense, urban traffic". The Rumbler is about 10 decibels quieter than a standard emergency vehicle siren and is generally activated in eight-second bursts by depressing the horn button in a Rumbler-equip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rumbler Siren
A Rumbler siren is a type of emergency vehicle siren used primarily in the United States. Developed in 2007 by Federal Signal Corporation, and sounding at a low-frequency level, it is designed to be heard by motorists who may otherwise be unable to hear high-frequency sirens due to ambient noise, such as urban traffic. Design The Rumbler produces a pulsating, low-frequency sound between 182 to 400 hertz, and is operated in tandem with a standard, piercing high-frequency siren. The lower frequency sound penetrates hard surfaces like glass and doors more effectively than high-frequency tones. In addition, the siren's low-frequency thumping sound also causes noticeable vibrations to drivers and pedestrians who are near it and helps to generate attention in high-noise environments like "dense, urban traffic". The Rumbler is about 10 decibels quieter than a standard emergency vehicle siren and is generally activated in eight-second bursts by depressing the horn button in a Rumbler-equip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reading, Pennsylvania
Reading ( ; Pennsylvania Dutch: ''Reddin'') is a city in and the county seat of Berks County, Pennsylvania, United States. The city had a population of 95,112 as of the 2020 census and is the fourth-largest city in Pennsylvania after Philadelphia, Pittsburgh, and Allentown. Reading is located in the southeastern part of the state and is the principal city of the Greater Reading Area, which had 420,152 residents as of 2020. Reading is part of the Delaware Valley, also known as the Philadelphia metropolitan area, a region that also includes Philadelphia, Upper Darby Township, Pennsylvania, Camden, and other suburban Philadelphia cities and regions. With a 2020 population of 6,228,601, the Delaware Valley is the seventh largest metropolitan region in the nation. Reading's name was drawn from the now-defunct Reading Company, widely known as the Reading Railroad and since acquired by Conrail, that played a vital role in transporting anthracite coal from the Pennsylvania's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Law Enforcement Equipment
Law is a set of rules that are created and are enforceable by social or governmental institutions to regulate behavior,Robertson, ''Crimes against humanity'', 90. with its precise definition a matter of longstanding debate. It has been variously described as a science and as the art of justice. State-enforced laws can be made by a group legislature or by a single legislator, resulting in statutes; by the executive through decrees and regulations; or established by judges through precedent, usually in common law jurisdictions. Private individuals may create legally binding contracts, including arbitration agreements that adopt alternative ways of resolving disputes to standard court litigation. The creation of laws themselves may be influenced by a constitution, written or tacit, and the rights encoded therein. The law shapes politics, economics, history and society in various ways and serves as a mediator of relations between people. Legal systems vary between jurisdictions, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Hum
The Hum is a name often given to widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported all over the world, including the United States, the United Kingdom, Australia and Canada. They are sometimes named according to the locality where the problem has been particularly publicized, such as the "Taos Hum" in New Mexico and the "Windsor Hum" in Ontario. The Hum does not appear to be a single phenomenon. Different causes have been attributed, including local mechanical sources, often from industrial plants, as well as manifestations of tinnitus or other biological auditory effects. Description A 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz, was found to only be heard during cool weather with a light breeze, and often early in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noise Pollution
Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them are harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems.Senate Public Works Committee. ''Noise Pollution and Abatement Act of 1972''. S. Rep. No. 1160, 92nd Congress. 2nd session Poor urban planning may give rise to noise disintegration or pollution, side-by-side industrial and residential buildings can result in noise pollution in the residential areas. Some of the main sources of noise in residential areas include loud music, transportation (traffic, rail, airplanes, etc.), lawn care maintenance, construction, electrical generators, wind turbines, explosions, and people. Documented problems associated with noise in urban environments go back as far as ancient Rome. Research suggests that noise pollution in the United States is the high ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macquarie Dictionary
The ''Macquarie Dictionary'' () is a dictionary of Australian English. It is generally considered by universities and the legal profession to be the authoritative source on Australian English. It also pays considerable attention to New Zealand English. Originally it was a publishing project of Jacaranda Press, a Brisbane educational publisher, for which an editorial committee was formed, largely from the Linguistics department of Macquarie University in Sydney, Australia. It is now published by Macquarie Dictionary Publishers, an imprint of Pan Macmillan Australia Pty Ltd. In October 2007 it moved its editorial office from Macquarie University to the University of Sydney, and later to the Pan Macmillan offices in the Sydney central business district. In addition to its two-volume flagship dictionary, shorter editions including the ''Macquarie Shorter Dictionary'', ''Macquarie Concise Dictionary'', ''Macquarie Budget Dictionary'' and ''Macquarie Little Dictionary'' are published. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Broadcasting Corporation
The Australian Broadcasting Corporation (ABC) is the national broadcaster of Australia. It is principally funded by direct grants from the Australian Government and is administered by a government-appointed board. The ABC is a publicly-owned body that is politically independent and fully accountable, with its charter enshrined in legislation, the ''Australian Broadcasting Corporation Act 1983''. ABC Commercial, a profit-making division of the corporation, also helps to generate funding for content provision. The ABC was established as the Australian Broadcasting Commission on 1 July 1932 by an act of federal parliament. It effectively replaced the Australian Broadcasting Company, a private company established in 1924 to provide programming for A-class radio stations. The ABC was given statutory powers that reinforced its independence from the government and enhanced its news-gathering role. Modelled after the British Broadcasting Corporation (BBC), which is funded by a tel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Straits Times
''The Straits Times'' is an English-language daily broadsheet newspaper based in Singapore and currently owned by SPH Media Trust (previously Singapore Press Holdings). ''The Sunday Times'' is its Sunday edition. The newspaper was established on 15 July 1845 as ''The Straits Times and Singapore Journal of Commerce''. ''The Straits Times'' is considered a newspaper of record for Singapore. The print and digital editions of ''The Straits Times'' and ''The Sunday Times'' have a daily average circulation of 364,134 and 364,849 respectively in 2017, as audited by Audit Bureau of Circulations Singapore. Myanmar and Brunei editions are published, with newsprint circulations of 5,000 and 2,500 respectively. History The original conception for ''The Straits Times'' has been debated by historians of Singapore. Prior to 1845, the only English-language newspaper in Singapore was ''The'' ''Singapore Free Press'', founded by William Napier in 1835. Marterus Thaddeus Apcar, an Armenian m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Singapore
Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, bordering the Strait of Malacca to the west, the Singapore Strait to the south, the South China Sea to the east, and the Straits of Johor to the north. The country's territory is composed of one main island, 63 satellite islands and islets, and one outlying islet; the combined area of these has increased by 25% since the country's independence as a result of extensive land reclamation projects. It has the third highest population density in the world. With a multicultural population and recognising the need to respect cultural identities of the major ethnic groups within the nation, Singapore has four official languages: English, Malay, Mandarin, and Tamil. English is the lingua franca and numerous public services are available only in Eng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New South Wales, Australia
) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_date = Colony of New South Wales , established_title2 = Establishment , established_date2 = 26 January 1788 , established_title3 = Responsible government , established_date3 = 6 June 1856 , established_title4 = Federation , established_date4 = 1 January 1901 , named_for = Wales , demonym = , capital = Sydney , largest_city = capital , coordinates = , admin_center = 128 local government areas , admin_center_type = Administration , leader_title1 = Monarch , leader_name1 = Charles III , leader_title2 = Governor , leader_name2 = Margaret Beazley , leader_title3 = Premier , leader_name3 = Dominic Perrottet (Liberal) , national_representation = Parliament of Australia , national_representation_type1 = Senate , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WDJT-TV
WDJT-TV (channel 58) is a television station in Milwaukee, Milwaukee, Wisconsin, United States, affiliated with CBS. It has been owned by Weigel Broadcasting since its inception (and is the company's only CBS affiliate), and is sister station, sister to Racine, Wisconsin, Racine-licensed Independent station (North America), independent station WMLW-TV (channel 49), Class A television service, Class A MeTV station WBME-CD (channel 41), and Telemundo affiliate WYTU-LD (channel 63). The stations share studios in the Renaissance Center office complex on South 60th Street in West Allis, Wisconsin, West Allis (with a Milwaukee United States Postal Service, postal address), while WDJT-TV's transmitter is located in Milwaukee's Parks of Milwaukee, Lincoln Park. History Launch and early struggles The station first signed on the air on November 10, 1988, operating as an Independent station (North America), independent station. Its call letters were selected in honor of its original owners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tulsa, Oklahoma
Tulsa () is the second-largest city in the state of Oklahoma and 47th-most populous city in the United States. The population was 413,066 as of the 2020 census. It is the principal municipality of the Tulsa Metropolitan Area, a region with 1,023,988 residents. The city serves as the county seat of Tulsa County, the most densely populated county in Oklahoma, with urban development extending into Osage, Rogers, and Wagoner counties. Tulsa was settled between 1828 and 1836 by the Lochapoka Band of Creek Native American tribe and most of Tulsa is still part of the territory of the Muscogee (Creek) Nation. Historically, a robust energy sector fueled Tulsa's economy; however, today the city has diversified and leading sectors include finance, aviation, telecommunications and technology. Two institutions of higher education within the city have sports teams at the NCAA Division I level: Oral Roberts University and the University of Tulsa. As well, the University of Oklaho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
