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Passive Radiator (speaker)
A speaker enclosure using a passive radiator (PR) usually contains an "active loudspeaker" (or main driver), and a passive radiator (also known as a "drone cone"). The active loudspeaker is a normal driver, and the passive radiator is of similar construction, but without a voice coil and magnet assembly. It is not attached to a voice coil or wired to an electrical circuit or power amplifier. Small and Hurlburt have published the results of research into the analysis and design of passive-radiator loudspeaker systems. The passive-radiator principle was identified as being particularly useful in compact systems where vent realization is difficult or impossible, but it can also be applied satisfactorily to larger systems. In the same way as a ported loudspeaker, a passive radiator system uses the sound pressure otherwise trapped in the enclosure to excite a resonance that makes it easier for the speaker system to create the deepest pitches (e.g., basslines). The passive radiator re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passive Radiator Enclosure
Passive may refer to: * Passive voice, a grammatical voice common in many languages, see also Pseudopassive (other), Pseudopassive * Passive language, a language from which an interpreter works * Passivity (behavior), the condition of submitting to the influence of one's superior * Passive-aggressive behavior, resistance to following through with expectations in interpersonal or occupational situations * Passive income, income resulting from cash flow received on a regular basis * Passive immunity, the transfer of active humoral immunity * Passive experience, observation lacking recipricol interaction; and wrought with delusion of control. Science and technology * Passivation (chemistry), process of making a material "passive" in relation to another material prior to using the materials together * Passivity (engineering) a property of engineering systems, particularly in analog electronics and control systems * Passive solar building design, which uses (or avoids) sunligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Home Stereo
Home audio systems are audio electronics intended for home entertainment use, such as shelf stereos, music centres and surround sound receivers. Home audio generally does not include standard equipment such as built-in television speakers, but rather accessory equipment, which may be intended to enhance or replace standard equipment, such as standard TV speakers. Since surround sound receivers, which are primarily intended to enhance the reproduction of a movie, are the most popular home audio device, the primary field of home audio is home cinema. History Monaural Home audio dates back before electricity, to Phonograph#First phonograph, Edison's phonograph, a monaural, Lo-fi music, low fidelity sound reproduction format. Early electrical phonographs as well as many other audio formats started out as monaural formats. Stereo Stereophonic sound was invented as a means of creating a sound stage, a more realistic reproduction of the sound as recorded live. Stereo sound usually refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustic Suspension
Acoustic suspension (air suspension, closed box, sealed box) is a method of loudspeaker cabinet design and utilisation that uses one or more loudspeaker drivers mounted in a sealed box or cabinet. Acoustic suspension systems reduce bass distortion that can be caused by stiff motor suspensions in conventional loudspeakers. A compact acoustic suspension loudspeaker was described in 1954 by Edgar Villchur, and it was brought to commercial production by Villchur and Henry Kloss with the founding of Acoustic Research in Cambridge, Massachusetts. In 1960, Villchur reiterated that: ''The first aim of the acoustic suspension design, over and above uniformity of frequency response, compactness, and extension of response into the low-bass range, is to reduce significantly the level of bass distortion that had previously been tolerated in loudspeakers. This is accomplished by substituting an air-spring for a mechanical one.'' Subsequently, the theory of closed-box loudspeakers was extensive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bass Reflex
A bass reflex system (also known as a ported, vented box or reflex port) is a type of loudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port. This port enables the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies as compared to a typical sealed- or closed-box loudspeaker or an infinite baffle mounting. A ''reflex port'' is the distinctive feature of this popular enclosure type. The design approach enhances the reproduction of the lowest frequencies generated by the woofer or subwoofer. The port generally consists of one or more tubes or pipes mounted in the front ( baffle) or rear face of the enclosure. Depending on the exact relationship between driver parameters, the enclosure volume (and filling if any), and the tube cross-section and length, the efficiency can be substantially improved over the performance of a similarly-sized sealed-box enclosure. Ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UE Boom
UE Boom is a portable speaker manufactured by Ultimate Ears, supporting Bluetooth and wired connections. UE Boom has been praised for its industrial design, loudness, battery life, speakerphone capability, and its suitability for outdoor use, but criticized for its comparatively high price. The speaker was first announced on May 21, 2013, and went on sale in the United States and Europe later that month. On September 15, 2015, Ultimate Ears introduced the UE Boom 2, a revised model of the UE Boom. The new model featured IPX7 waterproofing, a 25% increase in volume, and superior wireless range over the original model. The third revision, UE Boom 3, was announced on August 30, 2018 with a personalized version of the speaker announced on March 4, 2019. Design and features The speaker is an elongated cylinder measuring , similar in shape to a canned beverage, and weighing . It is coated in a water- and stain-resistant material and partly covered with rubber. The speaker comes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultimate Ears
Ultimate Ears is an American custom in-ear monitor (IEM), Wireless speaker, speaker, and earphone manufacturer based in Irvine, California, Irvine and Newark, California, United States. The custom in-ear monitor company was founded by Mindy and Jerry Harvey (inventor), Jerry Harvey in 1995 and it created a new market for custom IEMs which are now used by most of the world's top musicians. In August 2008, Ultimate Ears was acquired by Logitech and operates as a subsidiary. History In 1995, Jerry Harvey (inventor), Jerry Harvey was Van Halen's touring Audio engineering, monitor engineer, mixing their stage sound through Foldback (sound engineering), stage wedges—powerful loudspeakers aiming at each of the musicians. Drummer Alex Van Halen had great difficulty hearing the other band members over all the noise of the stage; louder monitors did not help. Harvey created a custom molded earpiece for the drummer to block some of the stage noise and focus on the desired sound: a proto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple Inc
Apple Inc. is an American multinational technology company headquartered in Cupertino, California, United States. Apple is the largest technology company by revenue (totaling in 2021) and, as of June 2022, is the world's biggest company by market capitalization, the fourth-largest personal computer vendor by unit sales and second-largest mobile phone manufacturer. It is one of the Big Five American information technology companies, alongside Alphabet, Amazon, Meta, and Microsoft. Apple was founded as Apple Computer Company on April 1, 1976, by Steve Wozniak, Steve Jobs and Ronald Wayne to develop and sell Wozniak's Apple I personal computer. It was incorporated by Jobs and Wozniak as Apple Computer, Inc. in 1977 and the company's next computer, the Apple II, became a best seller and one of the first mass-produced microcomputers. Apple went public in 1980 to instant financial success. The company developed computers featuring innovative graphical user inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smart Speaker
A smart speaker is a type of loudspeaker and voice command device with an integrated virtual assistant that offers interactive actions and hands-free activation with the help of one "hot word" (or several "hot words"). Some smart speakers can also act as a smart device that utilizes Wi-Fi, Bluetooth and other protocol standards to extend usage beyond audio playback, such as to control home automation devices. This can include, but is not limited to, features such as compatibility across a number of services and platforms, peer-to-peer connection through mesh networking, virtual assistants, and others. Each can have its own designated interface and features in-house, usually launched or controlled via application or home automation software. Some smart speakers also include a screen to show the user a visual response. As of winter 2017, it is estimated by NPR and Edison Research that 39 million Americans (16% of the population over 18) own a smart speaker. A smart speaker wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mackie
Mackie is an American professional audio products brand. Founded in Seattle in 1988 by Greg Mackie as a manufacturer of affordable and versatile compact pro audio mixers, Mackie is the primary product line of LOUD Technologies. History Mackie Designs, Inc. was founded in Woodinville, Washington by Greg Mackie, an ex-Boeing worker who began making pro audio gear and guitar amps in his spare time. After founding the small line mixer manufacturer TAPCO, and later the home audio processor manufacturer AudioControl, Mackie founded Mackie Designs, Inc., designing and manufacturing affordable and versatile compact pro audio mixers under the Mackie brand in his three bedroom condominium in Edmonds, Washington. Mackie's first product was the LM-1602 line mixer, priced at $399. Following the moderate sales success of the LM-1602, the company moved to a true factory in 1991 to produce and release its follow-up model, the CR-1604. With the flexibility to be used as either a desktop or r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Studio Monitor Speaker
Studio monitors are loudspeakers in speaker enclosures specifically designed for professional audio production applications, such as recording studios, filmmaking, television studios, radio studios and project or home studios, where accurate audio reproduction is crucial. Among audio engineers, the term ''monitor'' implies that the speaker is designed to produce relatively flat (linear) phase and frequency responses. In other words, it exhibits minimal emphasis or de-emphasis of particular frequencies, the loudspeaker gives an accurate reproduction of the tonal qualities of the source audio ("uncolored" or "transparent" are synonyms), and there will be no relative phase shift of particular frequencies—meaning no distortion in sound-stage perspective for stereo recordings. Beyond stereo sound-stage requirements, a linear phase response helps impulse response remain true to source without encountering "smearing". An unqualified reference to a ''monitor'' often refers to a ''ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Car Audio
Vehicle audio is equipment installed in a car or other vehicle to provide in-car entertainment and information for the vehicle 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 (1984), DVD players, Blu-ray players, navigation systems, Bluetooth telephone integration, and smartphone controllers like CarPlay and Android Auto. Once controlled from the dashboard with a few buttons, they can now be controlled by steering wheel controls and voice commands. Initially implemented for listening to music and radio, vehicle audio is now part of car telematics, telecommunication, in-vehicle security, handsfree calling, navigation, and remote diagnostics systems. The same loudspeakers may also be used to minimize road and engine noise with active noise control, or they may be used to augment engine sounds, for instance making a smaller engine sound bigger. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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