Vehicle audio is equipment installed in a car or other vehicle to provide in-car entertainment and information for the occupants. Until the 1950s, it consisted of a simple AM radio. Additions since then have included FM radio (1952), 8-track tape players, cassette players, record players, CD players, DVD players, Blu-ray players, navigation systems, Bluetooth telephone integration and audio streaming, and smartphone controllers like CarPlay and Android Auto. Once controlled from the dashboard with a few buttons, they can be controlled by steering wheel controls and voice commands.
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 transmissions, but also on the longwave and shortwave radio bands.
Radio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit. To receive the content the listener must have a broadcast radio receiver (radio). Stations are often affiliated with a radio network that provides content in a common radio format, either in broadcast syndication or simulcast, or both. The encoding of a radio broadcast depends on whether it uses an analog or digital signal. Analog radio broadcasts use one of two types of radio wave modulation: amplitude modulation for AM radio, or frequency modulation for FM radio. Newer, digital radio stations transmit in several different digital audio standards, such as DAB, HD radio, or DRM.
AM stereo is a term given to a series of mutually incompatible techniques for radio broadcasting stereo audio in the AM band in a manner that is compatible with standard AM receivers. There are two main classes of systems: independent sideband (ISB) systems, promoted principally by American broadcast engineer Leonard R. Kahn; and quadrature amplitude modulation (QAM) multiplexing systems.
In electronics and radio, a tuner is a type of receiver subsystem that receives RF transmissions, such as AM or FM broadcasts, and converts the selected carrier frequency into a form suitable for further processing or output, such as to an amplifier or loudspeaker. A tuner is also a standalone home audio product, component, or device called an AM/FM tuner or a stereo tuner that is part of a hi-fi or stereo system, or a TV tuner for television broadcasts. The verb tuning in radio contexts means adjusting the receiver to detect the desired radio signal carrier frequency that a particular radio station uses. Tuners were a major consumer electronics product in the 20th century but in practice are often integrated into other products in the modern day, such as stereo or AV receivers or portable radios.
HD Radio (HDR) is a trademark for a so-called in-band on-channel (IBOC) digital radio broadcast technology. HD radio generally simulcasts an existing analog radio station in digital format with less noise and with additional text information. HD Radio is used primarily by AM and FM radio stations in the United States, U.S. Virgin Islands, Canada, Mexico and the Philippines, with a few implementations outside North America.
Kenwood is a Japanese brand for consumer electronics. Since October 2011, Kenwood has been owned by JVCKenwood as a result of a merger between Kenwood Corporation and JVC. Kenwood manufactures audio equipment such as AM/FM stereo receivers, cassette tape decks/recorders, amateur radio (ham) equipment, radios, cellular phones, speakers, and other consumer electronics.
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 in such a way as to create the impression of sound heard from various directions, as in natural hearing.
Harman Kardon is a division of US-based Harman International Industries, an independent subsidiary of Samsung Electronics. Harman Kardon was originally founded in Westbury, New York, in 1953 by business partners Sidney Harman and Bernard Kardon.
FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio. FM broadcasting offers higher fidelity—more accurate reproduction of the original program sound—than other broadcasting techniques, such as AM broadcasting. It is also less susceptible to common forms of interference, having less static and popping sounds than are often heard on AM. Therefore, FM is used for most broadcasts of music and general audio. FM radio stations use the very high frequency range of radio frequencies.
Cambridge SoundWorks was a Massachusetts-based consumer audio manufacturer and retailer.
The Haeco-CSG or Holzer Audio Engineering-Compatible Stereo Generator system was an electronic analog audio signal processing device developed by Howard Holzer, Chief Engineer at A&M Records in Hollywood, California.
Fisher Electronics was an American company specialising in the field of hi-fi electronics. The company and the name was bought by Japanese electronics conglomerate Sanyo in 1975.
KFRC-FM is a commercial radio station in San Francisco, California, serving the San Francisco Bay Area. It currently simulcasts sister station KCBS, which carries an all-news format. The station transmits its signal from Mount Beacon atop the Marin Headlands above Sausalito, California, while studios were shared with formerly co-owned CBS O&O station KPIX-TV in downtown San Francisco.
Telos Alliance is an American corporation manufacturing audio products primarily for broadcast stations. Headquartered in Cleveland, Ohio, US, the company is divided into six divisions:
Tivoli Audio is an American manufacturing company producing tabletop radios and similar audio products. It was founded in 2000 by Tom DeVesto with the help of Henry Kloss.
KYLD is a commercial radio station in San Francisco, California, serving the San Francisco Bay Area and owned by San Antonio–based iHeartMedia. The station airs a Top 40 (CHR) format on its analog primary signal. The station has studios located in the SoMa district of San Francisco, and the transmitter is located atop the San Bruno Mountains.
WLRA or sometimes called WLRA Radio, or WLRA-FM, is a college radio station broadcasting a variety format. Licensed to Lockport, Illinois, USA, the station serves the Chicago/greater Joliet region. The station is licensed to and owned by Lewis University. Lewis University is a private Roman Catholic and Lasallian university with an enrollment of around 6,800 students. The station is a member of the National Association of Broadcasters, Illinois Broadcasters Association, and Broadcast Education Association.
Realistic was a private label consumer electronics brand produced by RadioShack. Initially only a home audio equipment brand, its product line expanded to include CB radios, walkie-talkies, and video camcorders by the 1980s. The brand was discontinued in 1994, but revived for a short time in 2016 for use on Bluetooth devices sold by the chain.
The Central Research Laboratories, often referred to as CRL, was a British research laboratory that originally belonged to the EMI Corporation.
