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The 1925 paper [1] of Chester W. Rice and Edward W. Kellogg, fueled by advances in radio and electronics, increased interest in direct radiator loudspeakers. In 1930, A. J. Thuras of Bell Labs patented (US Patent No. 1869178) his "Sound Translating Device" (essentially a vented box) which was evidence of the interest in many types of enclosure design at the time.
SpeakerCraft was founded in 1976 by Edward Haase, Ken Humphreys and Eugene Humphreys. [2] Beginning as a retail stereo store and original equipment manufacturer of loudspeakers for companies such as Sonance, Niles Audio, Bang and Olufsen, JBL, Polk Audio, and many others, the company evolved into a designer and installer of custom audio systems.
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
A transmission line loudspeaker is a loudspeaker enclosure design which uses the topology of an acoustic transmission line within the cabinet, compared to the simpler enclosures used by sealed (closed) or ported (bass reflex) designs.
Loudspeaker enclosures range in size from small "bookshelf" speaker cabinets with 4-inch (10 cm) woofers and small tweeters designed for listening to music with a hi-fi system in a private home to huge, heavy subwoofer enclosures with multiple 18-inch (46 cm) or even 21-inch (53 cm) speakers in huge enclosures which are designed for use in ...
Under UK jurisdiction, there has been little judicial activity in this area. The old judgment of R v Davis [2] provides: "If two names spelt differently necessarily sound alike, the court may, as matter of law, pronounce them to be idem sonantia; but if they do not necessarily sound alike, the question whether they are idem sonantia is a question of fact for the jury".