Eric Keith Alexander
Burglar Alarm in Orem, UT
License number
Utah 8405831-6502
Issued Date
Dec 18, 2012
Expiration Date
Mar 31, 2015
Category
Burglar Alarm
Type
Burglar Alarm Company Agent
Address
Address
Orem, UT
Personal information
See more information about Eric Keith Alexander at radaris.comName
Address
Phone
4058 Dublin Cir, Salt Lake City, UT 84119
9 Creek Dr, Salt Lake City, UT 84107
6173S Rainy Ln, Salt Lake City, UT 84107
6173 Rainy Ln, Salt Lake City, UT 84107
469 5600 S, Salt Lake City, UT 84107
Professional information
Audio Speaker System Employing An Annular Gasket Separating A Horn Waveguide From A Sound Reproducing Membrane
US Patent:
2005017, Aug 11, 2005
Filed:
Feb 11, 2004
Appl. No.:
10/776709
Inventors:
Clayton Shaw - Park City UT, US
David Staley - Park City UT, US
Eric Alexander - Orem UT, US
David Staley - Park City UT, US
Eric Alexander - Orem UT, US
International Classification:
H04R001/02, H04R001/20
US Classification:
381340000, 381354000, 381338000, 381339000
Abstract:
An audio speaker system employs an annular gasket that separates the sound reproducing membrane of a speaker driver with a horn waveguide. The annular gasket is disposed in an area outside of and adjacent to the throat of the horn waveguide. The annular gasket is preferably realized from closed cell foam or other compliant acoustically-absorbable material. The gasket minimizes the volume of the compression chamber that the sound reproducing membrane is compressing, thus leading to less frequency cancellation (which leads to improved frequency response of the speaker driver).
Audio Speaker System Employing An Axi-Symmetrical Horn With Wide Dispersion Angle Characteristics Over An Extended Frequency Range
US Patent:
7203329, Apr 10, 2007
Filed:
Feb 11, 2004
Appl. No.:
10/776708
Inventors:
Eric J. Alexander - Orem UT, US
David Bushnell Staley - Park City UT, US
Clayton C. Shaw - Park City UT, US
David Bushnell Staley - Park City UT, US
Clayton C. Shaw - Park City UT, US
Assignee:
SoundTube Entertainment, Inc. - Park City UT
International Classification:
H04R 1/02, H04R 7/00
US Classification:
381340, 181159
Abstract:
A speaker system includes a speaker driver loaded by a horn waveguide. The speaker driver reproduces sound within an extended frequency range that includes a high frequency band between 8 kHz and 11 kHz. In the preferred embodiment, the extended frequency range includes a wide frequency band between 2 kHz and 11 kHz (and most preferably including the frequency band between 800 Hz and 11 kHz). The horn waveguide has an axi-symmetrical waveguide surface that provides uniform polar dispersion at dispersion angles greater than 90 degrees for sound within the extended frequency range. The waveguide surface preferably has an annular cross section with a radial dimension that increases curvilinearly from its throat to its mouth, such as a tractroid surface.