Patent ID: 11948596
Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 10:
11. An apparatus for preventing a light-based attack on a sound-controllable device comprising:
a covering for removably covering at least a sound inlet to a microphone of the sound-controllable device, wherein the covering comprises at least a first layer, a second layer, a third layer, and a gap, wherein the gap separates the first layer from the second layer and the second layer from the third layer, wherein the first layer has at least one opening for admission of a sound wave into the gap, wherein the third layer has at least one opening for exit of the sound wave from the gap to the microphone, wherein the gap and the second layer form a serpentine path for the sound wave from the opening in the first layer to the microphone while preventing the microphone and the opening in the first layer from being in line of sight with each other.