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Electronic Voice Phenomenon
Within ghost hunting and parapsychology, electronic voice phenomena (EVP) are sounds found on electronic recordings that are interpreted as spirit voices. Parapsychologist Konstantīns Raudive, who popularized the idea in the 1970s, described EVP as typically brief, usually the length of a word or short phrase. Enthusiasts consider EVP to be a form of paranormal phenomenon often found in recordings with static or other background noise. Scientists regard EVP as a form of auditory pareidolia (interpreting random sounds as voices in one's own language) and a pseudoscience promulgated by popular culture. Prosaic explanations for EVP include apophenia (perceiving patterns in random information), equipment artifacts, and hoaxes. History As the Spiritualist religious movement became prominent in the 1840s–1940s with a distinguishing belief that the spirits of the dead can be contacted by mediums, new technologies of the era including photography were employed by spiritualists in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-noise
In signal processing, white noise is a random signal having equal intensity at different frequencies, giving it a constant power spectral density. The term is used, with this or similar meanings, in many scientific and technical disciplines, including physics, acoustical engineering, telecommunications, and statistical forecasting. White noise refers to a statistical model for signals and signal sources, rather than to any specific signal. White noise draws its name from white light, although light that appears white generally does not have a flat power spectral density over the visible band. In discrete time, white noise is a discrete signal whose samples are regarded as a sequence of serially uncorrelated random variables with zero mean and finite variance; a single realization of white noise is a random shock. Depending on the context, one may also require that the samples be independent and have identical probability distribution (in other words independent and identi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ouija Boards
The ouija ( , ), also known as a spirit board or talking board, is a flat board marked with the letters of the Latin alphabet, the numbers 0–9, the words "yes", "no", occasionally "hello" and "goodbye", along with various symbols and graphics. It uses a planchette (small heart-shaped piece of wood or plastic) as a movable indicator to spell out messages during a séance. Participants place their fingers on the planchette, and it is moved about the board to spell out words. "Ouija" is a trademark of Hasbro, but is often used generically to refer to any talking board. Spiritualists in the United States believed that the dead were able to contact the living and reportedly used a talking board very similar to a modern Ouija board at their camps in the U.S. state of Ohio in 1886 to ostensibly enable faster communication with spirits. Following its commercial introduction by businessman Elijah Bond on 1 July 1890, the Ouija board was regarded as an innocent parlor game unrelate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amplitude Modulation
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its phase, as in phase modulation. AM was the earliest modulation method used for transmitting audio in radio broadcasting. It was developed during the first quarter of the 20th century beginning with Roberto Landell de Moura and Reginald Fessenden's radiotelephone experiments in 1900. This original form of AM is sometimes called double-sideband amplitude modulation (DSBAM), because the standard method produces sidebands on either side of the carrier frequency. Single-sideband modulation uses bandpass filters to eliminate one of the sidebands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Receiver (radio)
In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used with an antenna. The antenna intercepts radio waves (electromagnetic waves of radio frequency) and converts them to tiny alternating currents which are applied to the receiver, and the receiver extracts the desired information. The receiver uses electronic filters to separate the desired radio frequency signal from all the other signals picked up by the antenna, an electronic amplifier to increase the power of the signal for further processing, and finally recovers the desired information through demodulation. Radio receivers are essential components of all systems that use radio. The information produced by the receiver may be in the form of sound, video (television), or digital data. A radio receiver may be a separate piece of electronic equipment, or an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AM Broadcasting
AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands. The earliest experimental AM transmissions began in the early 1900s. However, widespread AM broadcasting was not established until the 1920s, following the development of vacuum tube receivers and transmitters. AM radio remained the dominant method of broadcasting for the next 30 years, a period called the " Golden Age of Radio", until television broadcasting became widespread in the 1950s and received most of the programming previously carried by radio. Subsequently, AM radio's audiences have also greatly shrunk due to competition from FM (frequency modulation) radio, Digital Audio Broadcasting (DAB), satellite radio, HD (digital) radio, Internet radio, music streaming ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ghosthunters (TV Series)
''Ghosthunters'' is a British paranormal TV, paranormal documentary television series that originally aired from 1996 to 1997 on the Discovery Channel. The four-series program was produced by Inca Productions of Covent Garden, London (by producers Sheldon Greenberg and Eddie Babbage), hosted by Ian Cashmore, and narrated by William Woollard. Ian Cashmore also appeared in the promo for the American Syfy series ''Ghost Hunters (TV series), Ghost Hunters''. Premise Frequently aired on the Discovery Channel, Discovery Civilizations, and Science (TV channel), Discovery Science, the first two seasons explored contemporary research in the area of field parapsychology, largely by asking prominent researchers to explain and outline their best evidential cases, and interviewing witness while placing the cases in the context of parapsychology. Notable researchers regularly featured on the programme include professors Archie Roy, David Fontana and Peter Fenwick. Episodes Series 1 (1996) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediumship
Mediumship is the practice of purportedly mediating communication between familiar spirits or spirits of the dead and living human beings. Practitioners are known as "mediums" or "spirit mediums". There are different types of mediumship or spirit channelling, including séance tables, trance, and ouija. Belief in psychic ability is widespread despite the absence of objective evidence for its existence. Scientific researchers have attempted to ascertain the validity of claims of mediumship. An experiment undertaken by the British Psychological Society led to the conclusion that the test subjects demonstrated no mediumistic ability. Mediumship gained popularity during the nineteenth century, when ouija boards were used as a source of entertainment. Investigations during this period revealed widespread fraud—with some practitioners employing techniques used by stage magicians—and the practice began to lose credibility.Ruth Brandon. (1983). ''The Spiritualists: The Passion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington, DC
) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, National Cathedral , image_flag = Flag of the District of Columbia.svg , image_seal = Seal of the District of Columbia.svg , nickname = D.C., The District , image_map = , map_caption = Interactive map of Washington, D.C. , coordinates = , subdivision_type = Country , subdivision_name = , established_title = Residence Act , established_date = 1790 , named_for = George Washington, Christopher Columbus , established_title1 = Organized , established_date1 = 1801 , established_title2 = Consolidated , established_date2 = 1871 , established_title3 = Home Rule Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psychic
A psychic is a person who claims to use extrasensory perception (ESP) to identify information hidden from the normal senses, particularly involving telepathy or clairvoyance, or who performs acts that are apparently inexplicable by natural laws, such as psychokinesis or teleportation. Although many people believe in psychic abilities, the scientific consensus is that there is no proof of the existence of such powers, and describes the practice as pseudoscience. The word "psychic" is also used as an adjective to describe such abilities. Psychics encompass people in a variety of roles. Some are theatrical performers, such as stage magicians, who use various techniques, e.g., prestidigitation, cold reading, and hot reading, to produce the appearance of such abilities for entertainment purposes. A large industry and network exists whereby people advertised as psychics provide advice and counsel to clients. Some famous psychics include Edgar Cayce, Ingo Swann, Peter Hurkos, Janet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uppsala University
Uppsala University ( sv, Uppsala universitet) is a public research university in Uppsala, Sweden. Founded in 1477, it is the oldest university in Sweden and the Nordic countries still in operation. The university rose to significance during the rise of Sweden as a great power at the end of the 16th century and was then given a relative financial stability with a large donation from King Gustavus Adolphus in the early 17th century. Uppsala also has an important historical place in Swedish national culture, identity and for the Swedish establishment: in historiography, literature, politics, and music. Many aspects of Swedish academic culture in general, such as the white student cap, originated in Uppsala. It shares some peculiarities, such as the student nation system, with Lund University and the University of Helsinki. Uppsala belongs to the Coimbra Group of European universities and to the Guild of European Research-Intensive Universities. It has ranked among the world' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Konstantin Raudive
The first name Konstantin () is a derivation from the Latin name ''Constantinus'' ( Constantine) in some European languages, such as Russian and German. As a Christian given name, it refers to the memory of the Roman emperor Constantine the Great. A number of notable persons in the Byzantine Empire, and (via mediation by the Christian Eastern Orthodox Church) in Russian history and earlier East Slavic history are often referred to by this name. "Konstantin" means "firm, constant". There is a number of variations of the name throughout European cultures: * Константин (Konstantin) in Russian (diminutive Костя/Kostya), Bulgarian (diminutives Косьо/Kosyo, Коце/Kotse) and Serbian * Костянтин (Kostiantyn) in Ukrainian (diminutive Костя/Kostya) * Канстанцін (Kanstantsin) in Belarusian * Konstantinas in Lithuanian * Konstantīns in Latvian * Konstanty in Polish (diminutive Kostek) * Constantin in Romanian (diminutive Costel), French ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
