Acoustics – Sound-modifying means – Housing or enclosure
Reexamination Certificate
2007-04-24
2007-04-24
Donovan, Lincoln (Department: 2837)
Acoustics
Sound-modifying means
Housing or enclosure
C181S148000, C181S151000, C181S155000, C181S145000, C381S337000, C381S345000, C381S351000, C381S352000
Reexamination Certificate
active
10709538
ABSTRACT:
An acoustic impedance matching enclosure is provided having a driver loaded into a chamber buffering the throat/mouth of a closed loop transmission line. Transmission line consists of a termination member, outer and inner enclosure walls, high-density lining and throat/mouth area. Transmission line eliminates internal random standing waves while providing variable-frequency standing waves that through superposition of the waves compensates for mass-acceleration loss of the high-end of the driver output while damping the resonance of the driver. Alternative application of the acoustic impedance matching enclosure is that of compression loading the driver directly into the closed loop transmission line and using an acoustic low pass filter to translate the output into low frequencies only through a port. Both applications of the acoustic impedance matching enclosure are to insure that the drivers' diaphragm is clear of disruptive internal standing waves, properly loaded at all frequencies and not easily affected by room reflections.
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Donovan Lincoln
Luks Jeremy
McNeely Kevin J.
McNeely IP Law
TBI Audio Systems LLC
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