Sound absorbing device
AssigneeKorea Advanced Institute of Science and Technology
InventorsWonju Jeon, Hyeonbin Ryoo
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Abstract
A sound absorbing device according to an exemplary embodiment of the present invention comprises a plurality of sound absorbing cells arranged adjacent to each other on a plane, and each of the plurality of sound absorbing cells includes: a chamber having a volume therein, and in which a plurality of micro holes is perforated on a front surface in which a sound wave is incident; and a neck part introduced and extended to a rear of the front surface and penetrated by a through hole for communicating the outside and the chamber.
Claims19
A sound absorbing device comprising a plurality of sound absorbing cells arranged adjacent to each other on a plane, wherein,
- each of the plurality of sound absorbing cells includes:
- a chamber having a volume therein, and in which a plurality of micro holes is perforated on a front surface in which a sound wave is incident;
- and
- a neck part introduced and extended to a rear of the front surface and penetrated by a through hole for communicating the outside and the chamber,
- wherein:
- when the sound wave passes through the neck part and the plurality of micro holes, a phase change occurs due to a visco-thermal effect, so a sound wave radiated through the neck part and a sound wave radiated through the plurality of micro holes at a target frequency have opposite phases.
Dependencies are inferred from the claim text.