W. L. Gore & Associates, Inc.

Yitian Zhang

Wayne M Gibbons

Zachary E Lampert

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 &#x2212;45 over a frequency range of 50 to 20,000 Hz.

Acoustically resistive supported membrane assemblies including at least one support structure

Water impermeable, air permeable membrane assemblies are described herein. In some embodiments, the assemblies include a polymer membrane and at least one support layer. Certain assemblies are configured to provide an acoustic impedance having phase angle of +45 degrees to &#x2212;45 over a frequency range of 50 to 20,000 Hz.

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Newark, DE, United States of America

Yitian Zhang