Patent ID: 9497546
Filing Date: 2016-11-15
CPC Classification: H04R

Claim Text:
1. A stereo boundary microphone comprising: a boundary plate; a case body that has an elongate shape, includes a partition wall extending along a longitudinal direction in a middle portion of the case body and left and right grooves provided in opposite sides of the partition wall, and is attached to the boundary plate, the partition wall being used as a bottom of both the left and right grooves; and first and second microphones contained in tail end portions of the left and right grooves so as directional axes of the first and second microphones to be parallel with each other, wherein the case body is provided with acoustic passages that guide acoustic waves through the left and right grooves, and an opening communicating from the partition wall to the tail end portions, the opening serving as a rear acoustic hole to be used by both the first and second microphones.