Acoustic metamaterials

摘要

Metamaterial members for absorbing sound and pressure, and modular systems built of metamaterial members are provided. The metamaterial member includes an outer mass. The outer mass can have a cavity formed therein in which a stem coupled to an inner mass is disposed, or the outer mass can be solid and contain an inner mass embedded therein. The inner mass can include an inner core and an outer shell. Multiple metamaterial members can be attached to form a modular system for absorption of sound and pressure.

主权项

1. A metamaterial member for absorbing sound or pressure, the metamaterial member comprising:
an outer mass having a cavity formed therein, the outer mass having at least one inner edge defining the boundary of the cavity; at least one stem disposed within the cavity and extending from the inner edge; and at least one inner mass disposed within the cavity, the inner mass coupled with the stem and configured to undergo dynamic motion upon application of sound or pressure to the outer mass.