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Class Information
Number: 181/187
Name: Acoustics > Sound-modifying means > Intensifying horn > Plural intensifying portions
Description: Subject matter wherein the sound intensifying horn comprises more than one section having an increasing cross-sectional area in the direction of travel of the sound.










Sub-classes under this class:

Class Number Class Name Patents
181/188 Similar portions 22


Patents under this class:

Patent Number Title Of Patent Date Issued
8649544 Phasing plug for a compression driver Feb. 11, 2014
8452038 Multi-throat acoustic horn for acoustic filtering May. 28, 2013
8036403 Directional sound wave radiator Oct. 11, 2011
7886869 Acoustic waveguide mode controlling Feb. 15, 2011
7802650 Combination midrange and high frequency horn Sep. 28, 2010
7510049 Acoustic transformer and method for transforming sound waves Mar. 31, 2009
7392880 Dual range horn with acoustic crossover Jul. 1, 2008
7367423 Speaker assembly with aiming device May. 6, 2008
7299893 Loudspeaker horn and method for controlling grating lobes in a line array of acoustic sources Nov. 27, 2007
7278513 Internal lens system for loudspeaker waveguides Oct. 9, 2007
7134523 System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers Nov. 14, 2006
7095868 Phase plug with optimum aperture shapes Aug. 22, 2006
7068805 Acoustic waveguide for controlled sound radiation Jun. 27, 2006
6981570 Loudspeaker system with common low and high frequency horn mounting Jan. 3, 2006
6905001 Sounders for fire alarm systems Jun. 14, 2005
6712177 Cross-fired multiple horn loudspeaker system Mar. 30, 2004
6668969 Manifold for a horn loudspeaker and method Dec. 30, 2003
6408080 Boundary layer microphone Jun. 18, 2002
6394223 Loudspeaker with differential energy distribution in vertical and horizontal planes May. 28, 2002
6393131 Loudspeaker May. 21, 2002
6278789 Frequency selective acoustic waveguide damping Aug. 21, 2001
6112847 Loudspeaker with differentiated energy distribution in vertical and horizontal planes Sep. 5, 2000
6059069 Loudspeaker waveguide design May. 9, 2000
5925856 Loudspeaker horn Jul. 20, 1999
5327985 Acoustical transducer enclosure Jul. 12, 1994
5160815 Megaphone apparatus Nov. 3, 1992
5025887 Sanitary acoustic horn Jun. 25, 1991
5027411 High frequency loudspeaker Jun. 25, 1991
5020630 Loudspeaker and horn therefor Jun. 4, 1991
4969196 Speaker and horn array Nov. 6, 1990
4963855 Warning sound generating device Oct. 16, 1990
4930596 Loudspeaker system Jun. 5, 1990
4865159 Acoustic horn and attachment device Sep. 12, 1989
4845759 Sound source having a plurality of drivers operating from a virtual point Jul. 4, 1989
4836327 Sound reinforcement enclosure employing cone loudspeaker with annular central loading member and coaxially mounted compression driver Jun. 6, 1989
4685532 Constant directivity loudspeaker horn Aug. 11, 1987
4580655 Defined coverage loudspeaker horn Apr. 8, 1986
4469921 Horn type loudspeaker Sep. 4, 1984
4369857 Loudspeaker and horn combination Jan. 25, 1983
4344504 Directional loudspeaker Aug. 17, 1982
4324313 Exponential horn for use in horn-type loudspeakers Apr. 13, 1982
4308932 Loudspeaker horn Jan. 5, 1982
4210223 Low frequency folded exponential horn loudspeaker apparatus with bifurcated sound path Jul. 1, 1980
4187926 Loudspeaker horn Feb. 12, 1980
4176731 Two-section exponential acoustical horn Dec. 4, 1979
4071112 Horn loudspeaker Jan. 31, 1978
3964571 Acoustic system Jun. 22, 1976
3930561 Low distortion pyramidal dispersion speaker Jan. 6, 1976











 
 
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