|
High-fidelity
High fidelity (hi-fi or, rarely, HiFi) is the high-quality reproduction of sound. It is popular with audiophiles and home audio enthusiasts. Ideally, high-fidelity equipment has inaudible noise and distortion, and a flat (neutral, uncolored) frequency response within the human hearing range. High fidelity contrasts with the lower-quality "lo-fi" sound produced by inexpensive audio equipment, AM radio, or the inferior quality of sound reproduction that can be heard in recordings made until the late 1940s. History Bell Laboratories began experimenting with various recording techniques in the early 1930s. Performances by Leopold Stokowski and the Philadelphia Orchestra were recorded in 1931 and 1932 using telephone lines between the Academy of Music in Philadelphia and the Bell labs in New Jersey. Some multitrack recordings were made on optical sound film, which led to new advances used primarily by MGM (as early as 1937) and Twentieth Century Fox Film Corporation (as early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avery Fisher
Avery Robert Fisher (March 4, 1906 – February 26, 1994) was an amateur violinist, a pioneer in the field of high fidelity sound reproduction, founder of the Philharmonic Radio Company and Fisher Electronics, and a philanthropist who donated millions of dollars to arts organizations and universities. Early life and career Avery Fisher was born in Brooklyn, New York, the youngest of Charles (Anschel) (1868-1946) and Mary (Miriam) (née Byrach) (1869-1945) Fisher's six children. He came from a Jewish family. His parents had emigrated in 1903 (three years before his birth) from Kyiv, then a part of the Russian Empire. Fisher said he became fascinated with music through his father's extensive collection of early phonograph cylinder recordings and that everyone in the family had to learn to play a musical instrument. "I was born into a musical family. Every one of my parents' children was given an opportunity to learn an instrument. Papa would go down the line: violin, piano, violi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AM Radio
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 much of the programming previously carried by radio. Later, AM radio's audiences declined greatly due to competition from FM (FM broadcasting, frequency modulation) radio, Digital audio broadcasting, Digital Audio Broadcasting (DAB), satellite radio, HD Radio, HD (digital) radio, In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproduction Of Sound
Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording. Acoustic analog recording is achieved by a microphone diaphragm that senses changes in atmospheric pressure caused by acoustic sound waves and records them as a mechanical representation of the sound waves on a medium such as a phonograph record (in which a stylus cuts grooves on a record). In magnetic tape recording, the sound waves vibrate the microphone diaphragm and are converted into a varying electric current, which is then converted to a varying magnetic field by an electromagnet, which makes a representation of the sound as magnetized areas on a plastic tape with a magnetic coating on it. Analog sound reproduction is the reverse process, with a larger loudspeaker diaphragm cau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Audiophile
An audiophile (from + ) is a person who is enthusiastic about high-fidelity sound reproduction. The audiophile seeks to achieve high sound quality in the audio reproduction of recorded music, typically in a quiet listening space in a room with good acoustics. Audiophile values may be applied at all stages of music reproduction—the initial audio recording, the production process, the storage of sound data, and the playback (usually in a home setting). In general, the values of an audiophile are seen to be antithetical to the growing popularity of more convenient but lower-quality music, especially lossy digital file types like MP3, lower-definition music streaming services, laptop or cell phone speakers, and low-cost headphones. The term '' high-end audio'' refers to playback equipment used by audiophiles, which may be bought at specialist shops and websites. High-end components include turntables, digital-to-analog converters, equalization devices, preamplifiers and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia Orchestra
The Philadelphia Orchestra is an American symphony orchestra, based in Philadelphia. One of the " Big Five" American orchestras, the orchestra is based at the Kimmel Center for the Performing Arts, where it performs its subscription concerts, numbering over 130 annually, at Marian Anderson Hall (formerly Verizon Hall). From its founding until 2001, the Philadelphia Orchestra gave its concerts at the Academy of Music. The orchestra continues to own the Academy, and returns there one week per year for the Academy of Music's annual gala concert and concerts for school children. The Philadelphia Orchestra's summer home is the Mann Center for the Performing Arts. It also has summer residencies at the Saratoga Performing Arts Center, and since July 2007 at the Bravo! Vail Valley Festival in Vail, Colorado. The orchestra also performs an annual series of concerts at Carnegie Hall. From its earliest days the orchestra has been active in the recording studio, primarily for RCA Victor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinyl Record
A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is an analog signal, analog sound Recording medium, storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the outside edge and ends near the center of the disc. The stored sound information is made audible by playing the record on a phonograph (or "gramophone", "turntable", or "record player"). Records have been produced in different formats with playing times ranging from a few minutes to around 30 minutes per side. For about half a century, the discs were commonly made from shellac and these records typically ran at a rotational speed of 78 rpm, giving it the nickname "78s" ("seventy-eights"). After the 1940s, "vinyl" records made from polyvinyl chloride (PVC) became standard replacing the old 78s and remain so to this day; they have since been produced in various sizes and speeds, mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustics
Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an Acoustical engineering, acoustical engineer. The application of acoustics is present in almost all aspects of modern society with the most obvious being the audio and noise control industries. Hearing (sense), Hearing is one of the most crucial means of survival in the animal world and speech is one of the most distinctive characteristics of human development and culture. Accordingly, the science of acoustics spreads across many facets of human society—music, medicine, architecture, industrial production, warfare and more. Likewise, animal species such as songbirds and frogs use sound and hearing as a key element of mating rituals or for marking territories. Art, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks in World War II, Tanks and Air warfare of World War II, aircraft played major roles, enabling the strategic bombing of cities and delivery of the Atomic bombings of Hiroshima and Nagasaki, first and only nuclear weapons ever used in war. World War II is the List of wars by death toll, deadliest conflict in history, causing World War II casualties, the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Allied-occupied Germany, Germany, Allied-occupied Austria, Austria, Occupation of Japan, Japan, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harry F
Harry may refer to: Television *Harry (American TV series), ''Harry'' (American TV series), 1987 comedy series starring Alan Arkin *Harry (British TV series), ''Harry'' (British TV series), 1993 BBC drama that ran for two seasons *Harry (New Zealand TV series), ''Harry'' (New Zealand TV series), 2013 crime drama starring Oscar Kightley#Professional career, Oscar Kightley *Harry (talk show), ''Harry'' (talk show), 2016 American daytime talk show hosted by Harry Connick Jr. People and fictional characters *Harry (given name), a list of people and fictional characters with the given name, including **Prince Harry, Duke of Sussex (born 1984) *Harry (surname), a list of people with the surname Other uses *"Harry", the tunnel used in the Stalag Luft III escape ("The Great Escape") of World War II *Harry (album), ''Harry'' (album), a 1969 album by Harry Nilsson *Harry (derogatory term), derogatory term used in Norway *Harry (newspaper), ''Harry'' (newspaper), an underground newspaper in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reel-to-reel Audio Tape Recording
Reel-to-reel audio tape recording, also called open-reel recording, is Magnetic tape#Audio, magnetic tape audio recording in which the recording tape is spooled between reels. To prepare for use, the ''supply reel'' (or ''feed reel'') containing the tape is placed on a spindle or hub. The end of the tape is manually pulled from the reel, threaded through mechanical guides and over a tape head assembly, and attached by friction to the hub of the second, initially empty ''takeup reel''. Reel-to-reel systems use tape that is wide, which normally moves at . Domestic consumer machines almost always used or narrower tape and many offered slower speeds such as . All standard tape speeds are derived as a binary submultiple of 30 inches per second. Reel-to-reel preceded the development of the compact cassette with tape wide moving at . By writing the same audio signal across more tape, reel-to-reel systems give much greater High fidelity, fidelity at the cost of much larger tapes. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
