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Class Information
Number: 381/340
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Sound intensifying or spreading element > Horn
Description: Subject matter in which the intensifying element is a tubular element having a crossectional area which varies along the element"s length.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7617794 |
One piece horn cover |
Nov. 17, 2009 |
| 7590257 |
Axially propagating horn array for a loudspeaker |
Sep. 15, 2009 |
| 7506721 |
Convertible folded horn enclosure |
Mar. 24, 2009 |
| 7466837 |
Diffuser and speaker using the same |
Dec. 16, 2008 |
| 7467071 |
Waveguide modeling and design system |
Dec. 16, 2008 |
| 7426281 |
Electrodynamic acoustic transducer |
Sep. 16, 2008 |
| 7392880 |
Dual range horn with acoustic crossover |
Jul. 1, 2008 |
| 7352875 |
Speaker apparatus |
Apr. 1, 2008 |
| 7297238 |
Ultrasonic energy system and method including a ceramic horn |
Nov. 20, 2007 |
| 7275621 |
Skew horn for a loudspeaker |
Oct. 2, 2007 |
| 7268467 |
Acoustic transducer |
Sep. 11, 2007 |
| 7252176 |
Reflex-ported folded horn enclosure |
Aug. 7, 2007 |
| 7236606 |
Sound system having a HF horn coaxially aligned in the mouth of a midrange horn |
Jun. 26, 2007 |
| 7203329 |
Audio speaker system employing an axi-symmetrical horn with wide dispersion angle characteristics over an extended frequency range |
Apr. 10, 2007 |
| 7197443 |
Waveguide modeling and design system |
Mar. 27, 2007 |
| 7178629 |
Electroacoustic public address unit with acoustic horn or waveguide |
Feb. 20, 2007 |
| 7177437 |
Multiple aperture diffraction device |
Feb. 13, 2007 |
| 7142680 |
Multiple waveguide coaxial ceiling loudspeaker |
Nov. 28, 2006 |
| 7095868 |
Phase plug with optimum aperture shapes |
Aug. 22, 2006 |
| 7072481 |
Two-stage phasing plug system in a compression driver |
Jul. 4, 2006 |
| 7068805 |
Acoustic waveguide for controlled sound radiation |
Jun. 27, 2006 |
| 7044265 |
Constant directivity acoustic horn |
May. 16, 2006 |
| 7039211 |
Horn-loaded compression driver system |
May. 2, 2006 |
| 7027605 |
Mid-range loudspeaker |
Apr. 11, 2006 |
| 7010138 |
Loudspeakers |
Mar. 7, 2006 |
| 6981570 |
Loudspeaker system with common low and high frequency horn mounting |
Jan. 3, 2006 |
| 6959093 |
Low frequency active noise control |
Oct. 25, 2005 |
| 6950530 |
Directional loudspeaker unit |
Sep. 27, 2005 |
| 6771787 |
Waveguide electroacoustical transducing |
Aug. 3, 2004 |
| 6754360 |
Signal-horn |
Jun. 22, 2004 |
| 6744899 |
Direct coupling of waveguide to compression driver having matching slot shaped throats |
Jun. 1, 2004 |
| 6658127 |
Speaker system having an amplifying horn |
Dec. 2, 2003 |
| 6658128 |
Horn loudspeaker |
Dec. 2, 2003 |
| 6650760 |
Loudspeaker |
Nov. 18, 2003 |
| 6628796 |
Axially propagating mid and high frequency loudspeaker systems |
Sep. 30, 2003 |
| 6621909 |
Horn loudspeaker and loudspeaker systems |
Sep. 16, 2003 |
| 6597794 |
Portable electronic device having an external speaker chamber |
Jul. 22, 2003 |
| 6574344 |
Directional horn speaker system |
Jun. 3, 2003 |
| 6519348 |
Speaker apparatus and television set |
Feb. 11, 2003 |
| 6516076 |
Modular horn loudspeaker |
Feb. 4, 2003 |
| 6502662 |
Speaker having a hemispherical vibrator |
Jan. 7, 2003 |
| 6466680 |
High-frequency loudspeaker module for cinema screen |
Oct. 15, 2002 |
| 6411718 |
Sound reproduction employing unity summation aperture loudspeakers |
Jun. 25, 2002 |
| 6394223 |
Loudspeaker with differential energy distribution in vertical and horizontal planes |
May. 28, 2002 |
| 6389144 |
Sound field equalizing apparatus for speaker system |
May. 14, 2002 |
| 6356642 |
Multi-speaker system |
Mar. 12, 2002 |
| 6343134 |
Loudspeaker and horn with an additional transducer |
Jan. 29, 2002 |
| 6343133 |
Axially propagating mid and high frequency loudspeaker systems |
Jan. 29, 2002 |
| 6320970 |
High frequency compression drivers |
Nov. 20, 2001 |
| 6243475 |
Speaker |
Jun. 5, 2001 |
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