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| Number | Title | Issue Date |
| 7190801 | Horn loudspeaker A horn loudspeaker includes a horn housing having a top wall, an inner surrounding wall that extends downwardly from the top wall, a bottom wall that extends laterally and outwardly from the inner surrounding wall, and an outer surrounding wall that extends upwardly... | 03/13/2007 |
| 6712177 | Cross-fired multiple horn loudspeaker system The invention relates to a horn loudspeaker system. The horn loudspeaker system includes a pair of vertically displaced horns with cross-fired aiming angles. A common throat section couples the horns to a driver. A substantially asymmetrical baffling is incorporated... | 03/30/2004 |
| 5327985 | Acoustical transducer enclosure The present invention relates to an acoustical transducer enclosure which is particularly adapted for directing sound waves and is housed in a multisided enclosure. The enclosure has a cylindrical hollow tube, held in position by a pair of forward baffles... | 07/12/1994 |
| 5233136 | Horn loadspeaker A horn loudspeaker has an opening formed in a wall of a horn, and a tubular duct is provided along the horn and communicated with the opening. The length L of the duct is expressed as, L.perspectiveto.c/4fr-0.4d where c is a velocity of sound, fr is a fre... | 08/03/1993 |
| 5181301 | Method of making a very compact audio warning system A vehicle warning system (1) is disclosed. The device includes a main housing (2) to which is attached a sound generator (7), a lighting system (4), a mounting bracket (4) which is used to attach the device to an emergency vehicle, and a trim ring (6) whi... | 01/26/1993 |
| 5111905 | Speaker enclosure A loudspeaker enclosure accommodates at least one speaker in the front wall of the enclosure. The interior of the enclosure is divided into at least two smaller chambers by means of a partition inclined with respect to the front and rear walls. One such c... | 05/12/1992 |
| 4982436 | Dual horn folded soundpath loudspeaker A loudspeaker having two horns defining two soundpaths passing therethrough an input for connection to a driver and an output for broadcasting an acoustic signal is shown to include a central channel connected at one end to the input, the soundpaths being... | 01/01/1991 |
| 4896134 | Armored self-contained outdoor/indoor siren assembly An armored self-contained outdoor/indoor siren assembly which eliminates the need for an additional protective box and an additional tamper switch which are generally used in the prior art installations. The armored siren assembly of the invention consist... | 01/23/1990 |
| 4893343 | Dual diverging manifold loudspeaker system A dual diverging manifold loudspeaker system includes a generally cubically-shaped outer horn housing and an inner dome-like cap member for encapsulating therebetween a compression driver assembly. The loudspeaker system includes a back plate member which... | 01/09/1990 |
| 4865159 | Acoustic horn and attachment device Disclosed is an acoustic horn to aid in bulk powdered material handling particularly from trucks and railroad cars. Such acoustic horn is comprised of an external cone having a driver affix thereto. There is also an inverted internal cone contained within... | 09/12/1989 |
| 4860367 | Low frequency loud speaker A low frequency loud speaker is disclosed for use in a room at the intersection of two, mutually perpendicular planes, such as a ceiling and a wall, a floor and a wall or two walls. The speaker has a back air chamber within which an electrically-driven di... | 08/22/1989 |
| 4853964 | Electroacoustic apparatus for reproducing lowest to medium frequencies Electroacoustic apparatus for reproducing lowest to medium frequencies being provided with a housing wherein a folded exponential horn combined with a loudspeaker is defined having five horn element walls lengthening the horn with good exponential form to... | 08/01/1989 |
| 4790408 | Coiled exponential bass/midrange horn loudspeakers Coiled Exponential Bass Midrange Horn Loudspeakers which are each characterized by a rigid cabinet of selected size having a sealed air chamber in the base thereof for receiving a low frequency speaker, or driver, and a coiled or convoluted, exponentially... | 12/13/1988 |
| 4210223 | Low frequency folded exponential horn loudspeaker apparatus with bifurcated sound path A low frequency loudspeaker apparatus includes a folded exponential horn which is divided to provide a bifurcated curved sound path from at least one electroacoustic transducer that is positioned at the throat of the horn to a volume into which sound wave... | 07/01/1980 |
| 4168761 | Symmetrical air friction enclosure for speakers The disclosure concerns itself with labyrinth speakers systems which are provided with a plurality of internal partitions which are generally spaced from each other and are provided with apertures therein to form at least one tortuous path for a backwave ... | 09/25/1979 |
| 4116302 | Horn loudspeaker A horn loudspeaker construction wherein an integrated sound chamber and horn assembly is provided by two uniquely configured members that form a highly efficient horn loudspeaker capable of being utilized within a four-inch type electrical box. The horn l... | 09/26/1978 |
| 3993162 | Acoustic speaker system A speaker enclosure for a stereophonic sound system is disclosed. The speaker is mounted in a chamber, the enclosure of which is connected to a tube of relatively long length and of circular cross-section. The construction is such that phase-inversion occ... | 11/23/1976 |
