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US 2022/0036873 A1Published application
Acoustically resistive supported membrane assemblies including at least one support structure
AssigneeW. L. Gore & Associates, Inc.
InventorsZachary E. Lampert, Wayne M. Gibbons, Yitian Zhang
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Abstract
Water impermeable, air permeable membrane assemblies are described herein. In some embodiments, the assemblies include a polymer membrane and at least one support structure. Certain assemblies are configured to provide an acoustic impedance having phase angle of +45 degrees to −45 over a frequency range of 50 to 20,000 Hz.
Claims20
An assembly comprising:
- a polymer membrane;
- and
- at least one support structure,
- wherein at least a portion of the at least one support structure is in contact with the polymer membrane;
- wherein the assembly has an airflow resistance of from 100 to 50,000 Rayls;
- wherein the assembly has an effective stiffness from 0.0002 Pa/nm to 3,000 Pa/nm when measured using a Vibrational Displacement Test (“VDT”);
- and
- wherein the assembly has an acoustic impedance with a phase angle of +45 degrees to −45 degrees over a frequency range of 50 to 20,000 Hz as measured by an Impedance Tube Transfer Matrix Test (“ITTMT”).
5 more elements
An assembly, comprising:
- a polymer membrane;
- and
- at least one support structure,
- wherein at least a portion of the at least one support structure is in contact with the polymer membrane;
- wherein the assembly has an acoustic impedance with a phase angle of +45 degrees to −45 degrees over a frequency range of 50 to 20,000 Hz as measured by an Impedance Tube Transfer Matrix Test (“ITTMT”).
2 more elements
An assembly comprising:
- a polymer membrane;
- and
- at least one support structure,
- wherein at least a portion of the at least one support structure is in contact with the polymer membrane;
- wherein the assembly exhibits a transmission loss that does not vary by more than 1.5 dB/octave over a frequency range of 50 to 20,000 Hz when measured by an Impedance Tube Transfer Matrix Test (“ITTMT”).
2 more elements
Dependencies are inferred from the claim text.