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NOS Stereo Technique
The NOS stereo technique is a method of capturing stereo sound. The Nederlandse Omroep Stichting (NOS, English: Dutch Broadcast Foundation) found a stereo main microphone system by a number of practical attempts in the 1960s. This system resulted in a quite even distribution of the phantom sources (hearing event direction) on the stereo loudspeaker base, with two small cardioid characteristic microphones, and a recording angle of the microphone system of ±40.5° = 81°. This system got empirical an axle angle of ''α'' = ±45° = 90° and a microphone distance (microphone basis) of ''a'' = 30 cm. With this system are frequency-independent level differences effective and time of arrival differences working together in the same direction as interchannel signals (interchannel loudspeaker signals). This technique leads to a realistic stereo effect and has a reasonable mono-compatibility. These interchannel differences have nothing to do with interaural differences which come on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stereo Sound
Stereophonic sound, or more commonly stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective. This is usually achieved by using two independent audio channels through a configuration of two loudspeakers (or stereo headphones) in such a way as to create the impression of sound heard from various directions, as in natural hearing. Because the multi-dimensional perspective is the crucial aspect, the term ''stereophonic'' also applies to systems with more than two channels or speakers such as quadraphonic and surround sound. Binaural sound systems are also ''stereophonic''. Stereo sound has been in common use since the 1970s in entertainment media such as broadcast radio, recorded music, television, video cameras, cinema, computer audio, and internet. Etymology The word ''stereophonic'' derives from the Greek (''stereós'', "firm, solid") + (''phōnḗ'', "sound, tone, voice") and it was coined in 1927 by Western E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nederlandse Omroep Stichting
The Nederlandse Omroep Stichting (; NOS ; English: Dutch Broadcasting Foundation) is one of the broadcasting organisations making up the Netherlands Public Broadcasting system. It has a special statutory obligation to make news and sports programmes for the three Dutch public television channels and the Dutch public radio services. It is funded by the Dutch government. The foundation's remit derives from the Dutch Media Act 2008, which stipulates that the NOS produce regular and frequent programming of a public service nature, including, notably, a full and impartial news service and coverage of parliamentary procedures and debates, as well as reporting on sporting and other national events. The NOS also acts as technical co-ordinator for the Dutch public broadcasting system as a whole. In the event of emergencies and/or the breaking of a major news story, it can assume control of the public networks in order to provide co-ordinated coverage of events in co-operation with the othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microphone
A microphone, colloquially called a mic or mike (), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, and radio and television broadcasting. They are also used in computers for recording voice, speech recognition, VoIP, and for other purposes such as ultrasonic sensors or knock sensors. Several types of microphone are used today, which employ different methods to convert the air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field; the condenser microphone, which uses the vibrating diaphragm as a capacitor plate; and the contact microphone, which uses a crystal of piezoelectric material. Microphones typically n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ORTF Stereo Technique
The ORTF stereo technique, also known as ''side-other-side'', is a microphone technique used to record stereo sound. It was devised around 1960 at the Office de Radiodiffusion Télévision Française (ORTF) at Radio France. ORTF combines both the volume difference provided as sound arrives on- and off-axis at two cardioid microphone A microphone, colloquially called a mic or mike (), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public ...s spread to a 110° angle, as well as the timing difference as sound arrives at the two microphones spaced 17 cm apart. The microphones should be as similar as possible, preferably a frequency-matched pair of an identical type and model. The result is a realistic stereo field that has reasonable compatibility with mono playback. Since the cardioid polar pattern rejects off-axis sound, less of the amb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Office De Radiodiffusion Télévision Française
L'Office de Radiodiffusion-Télévision Française (ORTF; ) was the national agency charged, between 1964 and 1975, with providing public radio and television in France. All programming, and especially news broadcasts, were under strict control of the national government. History Background In 1945, the provisional French government established a public monopoly on broadcasting with the formation of Radiodiffusion Française (RDF). This nationalisation of all private radio stations marked the beginning of a new era of state-controlled broadcasting in France. As part of its mandate, the RDF also established a 441-line television station known as ''Télévision française''. This station made use of the frequencies previously utilised by the Nazi-operated ''Fernsehsender Paris''. In 1949, the RDF underwent a name change to Radiodiffusion-Télévision Française (RTF) in order to reflect the organisation's growing focus on television broadcasting. By the end of the year, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blumlein Pair
Blumlein pair is a stereo recording technique invented by Alan Blumlein for the creation of recordings that, upon replaying through headphones or loudspeakers, recreate the spatial characteristics of the recorded signal. The pair consists of an array of two matched microphones that have a bi-directional (figure-8) pickup pattern. They are positioned 90° from each other. Ideally, the transducers should occupy the same physical space; since this cannot be achieved, the microphone capsules are placed as close to each other as physically possible, generally with one centered directly above the other. The array is oriented so that the line bisecting the angle between the two microphones points towards the sound source to be recorded (see diagram). The pickup patterns of the pair, combined with their positioning, delivers a high degree of stereo separation in the source signal, as well as the room ambiance. The Blumlein pair produces an exceptionally realistic stereo image, but the qu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microphone Practices
A microphone, colloquially called a mic or mike (), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, and radio and television broadcasting. They are also used in computers for recording voice, speech recognition, VoIP, and for other purposes such as ultrasonic sensors or knock sensors. Several types of microphone are used today, which employ different methods to convert the air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field; the condenser microphone, which uses the vibrating diaphragm as a capacitor plate; and the contact microphone, which uses a crystal of piezoelectric material. Microphones typically need ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recording
A record, recording or records may refer to: An item or collection of data Computing * Record (computer science), a data structure ** Record, or row (database), a set of fields in a database related to one entity ** Boot sector or boot record, record used to start an operating system ** Storage record, a basic input/output structure Documents * Record, a document ** Business record, of economic transactions ** Criminal record, a list of a person's criminal convictions ** Docket (court), the summary of proceedings in a court (US) ** Medical record, of a person's medical history and treatments ** Minutes, a summary of the proceedings at a meeting ** Public records, information that has been filed or recorded by public agencies ** Recording (real estate), the act of documenting real estate transactions ** Service record, usually associated with military service ** Transcript (law), a verbatim ''record'' of some proceedings, in particular a court transcript is a record of a law co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
