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

Claim 5:
6. An apparatus for use with a microphone of a voice-controllable device, comprising:
a first light-blocking layer including at least a light-blocking portion and at least one opening;
a second light-blocking layer including at least a light-blocking portion;
a third light-blocking layer including at least a light-blocking portion and at least one opening; and
a gap separating the first light-blocking layer from the second light-blocking layer and also separating the second light-blocking layer from the third light-blocking layer;
wherein the at least one opening in the first light-blocking layer admits a sound wave into the gap, wherein the least one opening of the third light-blocking layer permits the sound wave to exit from the gap to the microphone, and wherein the gap and the second light-blocking layer are arranged to form a serpentine path for the sound wave travelling from the opening in the first light-blocking layer to the microphone and also so as to block a line of sight passage of light to the microphone from the opening in the first light-blocking layer when the apparatus is removably placed over the microphone.