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

Claim 0:
1. An apparatus configured to block a line of sight passage of light to a microphone of a voice-controllable device, but to allow a passage of sound to the microphone, comprising:
a covering, for removably covering at least a sound inlet to the microphone of the voice-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.