ACOUSTIC PANEL WITH ACOUSTIC UNIT LAYER
First Claim
1. An acoustic panel, comprising:
- a plurality of acoustic units, each acoustic unit including a subwavelength cell, an acoustic septum attached across the cell and an acoustic backing attached across the cell behind the acoustic septum;
whereinthe acoustic units have uniform constructions with the exception of varying cross-sectional dimensions, and varying peak absorption frequencies based on the varying cross-sectional dimensions; and
in relation to the peak absorption frequency for each acoustic unit, the acoustic septum is a vibratory membrane and the acoustic backing is an anti-vibration back plate, and the acoustic unit is acoustic impedance matched, whereby the acoustic unit is configured to substantially non-propagatively absorb frontal acoustic excitation at the peak absorption frequency using the acoustic septum and the acoustic backing.
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Accused Products
Abstract
An acoustic panel includes a plurality of acoustic units. Each acoustic unit includes a subwavelength cell, an acoustic septum attached across the cell and an acoustic backing attached across the cell behind the acoustic septum. The acoustic units have uniform constructions with the exception of varying cross-sectional dimensions, and varying peak absorption frequencies based on the varying cross-sectional dimensions. In relation to the peak absorption frequency for each acoustic unit, the acoustic septum is a vibratory membrane and the acoustic backing is an anti-vibration back plate, and the acoustic unit is acoustic impedance matched, whereby the acoustic unit is configured to substantially non-propagatively absorb frontal acoustic excitation at the peak absorption frequency using the acoustic septum and the acoustic backing.
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20 Claims
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1. An acoustic panel, comprising:
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a plurality of acoustic units, each acoustic unit including a subwavelength cell, an acoustic septum attached across the cell and an acoustic backing attached across the cell behind the acoustic septum;
whereinthe acoustic units have uniform constructions with the exception of varying cross-sectional dimensions, and varying peak absorption frequencies based on the varying cross-sectional dimensions; and in relation to the peak absorption frequency for each acoustic unit, the acoustic septum is a vibratory membrane and the acoustic backing is an anti-vibration back plate, and the acoustic unit is acoustic impedance matched, whereby the acoustic unit is configured to substantially non-propagatively absorb frontal acoustic excitation at the peak absorption frequency using the acoustic septum and the acoustic backing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An acoustic panel, comprising:
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a plurality of acoustic units whose construction is based on a cellular panel that at least partially forms a plurality of subwavelength, uniform height and varying cross-sectional dimension cells, an acoustic septum layer layered ahead of the cellular panel, whose coincident locations with the cells form associated uniform height-wise position acoustic septa attached across the cells, and an acoustic backing layer layered behind the cellular panel, whose coincident locations with the cells form associated uniform height-wise position acoustic backings attached across the cells behind the acoustic septa, the acoustic units respectively including the cells, the acoustic septa and the acoustic backings;
whereinthe acoustic units have varying peak absorption frequencies based on the varying cross-sectional dimension cells; and in relation to the peak absorption frequency for each acoustic unit, the acoustic septum is a vibratory membrane and the acoustic backing is an anti-vibration back plate, and the acoustic unit is acoustic impedance matched, whereby the acoustic unit is configured to substantially non-propagatively absorb frontal acoustic excitation at the peak absorption frequency using the acoustic septum and the acoustic backing. - View Dependent Claims (12, 13, 14, 15)
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16. An acoustic panel, comprising:
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a plurality of acoustic units whose construction is based on a plurality of subwavelength, rectangular cross-section, uniform height and varying cross-sectional dimension cells configured to rectify diffused frontal acoustic excitation into normal frontal acoustic excitation, the acoustic units respectively including the cells, uniform depth, uniform thickness and uniform material property acoustic septa attached across the cells, and uniform height-wise position, uniform thickness and uniform material property acoustic backings attached across the cells behind the acoustic septa;
whereinthe acoustic units have varying peak absorption frequencies based on the varying cross-sectional dimension cells; and in relation to the peak absorption frequency for each acoustic unit, the acoustic septum is a vibratory membrane and the acoustic backing is an anti-vibration back plate, and the acoustic unit is acoustic impedance matched, whereby the acoustic unit is configured to substantially non-propagatively absorb frontal acoustic excitation at the peak absorption frequency using the acoustic septum and the acoustic backing. - View Dependent Claims (17, 18, 19, 20)
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Specification