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Class Information
Number: 181/193
Name: Acoustics > Sound-modifying means > Intensifying horn > Particular shape of the horn > Spiral sound path
Description: Subject matter wherein the wall of the horn is arranged to provide a spiral sound path.

Patents under this class:

Patent Number Title Of Patent Date Issued
8261685 Horn guard device for motorcycle Sep. 11, 2012
8205712 Ported loudspeaker enclosure with tapered waveguide absorber Jun. 26, 2012
7650006 Method to generate a plane acoustic wave front, a plane wave channel, a loudspeaker construction and a linear loudspeaker array Jan. 19, 2010
7617794 One piece horn cover Nov. 17, 2009
7284638 Loudspeaker low profile quarter wavelength transmission line and enclosure and method Oct. 23, 2007
6973994 Apparatus for increasing the quality of sound from an acoustic source Dec. 13, 2005
6648098 Spiral acoustic waveguide electroacoustical transducing system Nov. 18, 2003
6356643 Electro-acoustic transducer Mar. 12, 2002
4689609 Electronic horn with spiral deflecting walls coupled to a truncated cone structure Aug. 25, 1987
4206831 Loudspeaker coupler Jun. 10, 1980

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