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Class Information
Number: 381/352
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Acoustic enclosure > Having internal wave reflecting means
Description: Subject matter wherein the cavity or housing contains means to redirect a direction of travel of a sound wave.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7520368 |
Horizontally folded reflex-ported bass horn enclosure |
Apr. 21, 2009 |
| 7513332 |
Convertible folded horn enclosure with improved compactness |
Apr. 7, 2009 |
| 7506721 |
Convertible folded horn enclosure |
Mar. 24, 2009 |
| 7454025 |
Loudspeaker with internal negative stiffness mechanism |
Nov. 18, 2008 |
| 7426282 |
Head set speaker and stereo playing device |
Sep. 16, 2008 |
| 7426280 |
Electroacoustic waveguide transducing |
Sep. 16, 2008 |
| 7233677 |
Top-loading folded corner horn |
Jun. 19, 2007 |
| 7207413 |
Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems |
Apr. 24, 2007 |
| 7123735 |
Method and apparatus to increase acoustic separation |
Oct. 17, 2006 |
| RE39330 |
Speaker system and a method for improving sound quality thereof |
Oct. 10, 2006 |
| 7046816 |
Coincident source stereo speaker |
May. 16, 2006 |
| 6996030 |
Apparatus and method for minimizing reception nulls in heterodyned ultrasonic signals |
Feb. 7, 2006 |
| 6675932 |
Speaker housing configured to minimize standing waves and resonate above the frequency range of transducers |
Jan. 13, 2004 |
| 6636610 |
Loudspeaker systems |
Oct. 21, 2003 |
| 6625291 |
Diffused resonance loudspeaker enclosure method |
Sep. 23, 2003 |
| 6574344 |
Directional horn speaker system |
Jun. 3, 2003 |
| 6320971 |
Speaker system and a method for improving sound quality thereof |
Nov. 20, 2001 |
| 5452025 |
Television set with sound-reflecting sidewalls |
Sep. 19, 1995 |
| 5446792 |
Reflection-type speaker apparatus |
Aug. 29, 1995 |
| 5373564 |
Transmission line for planar waves |
Dec. 13, 1994 |
| 5369712 |
Speaker |
Nov. 29, 1994 |
| 5216210 |
Loudspeaker system with passive sound reflective intensifier |
Jun. 1, 1993 |
| 5012889 |
Speaker enclosure |
May. 7, 1991 |
| 4979219 |
Piezoelectric speakers |
Dec. 18, 1990 |
| 4924962 |
Sound reproducing apparatus for use in vehicle |
May. 15, 1990 |
| 4893343 |
Dual diverging manifold loudspeaker system |
Jan. 9, 1990 |
| 4875546 |
Loudspeaker with acoustic band-pass filter |
Oct. 24, 1989 |
| 4628528 |
Pressure wave transducing |
Dec. 9, 1986 |
| 4385211 |
Reflex horn speaker with a waterproofing device |
May. 24, 1983 |
| 4122302 |
Two way dynamic and electrostatic speaker enclosure with side vent for greater high frequency dispersion |
Oct. 24, 1978 |
| 4051919 |
High fidelity speaker enclosure |
Oct. 4, 1977 |
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