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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5027411 |
High frequency loudspeaker |
Jun. 25, 1991 |
| 5025887 |
Sanitary acoustic horn |
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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