Patent · US Active

Microphone array

US11671751B2 · kind B2 · utility

0Cited by

6References

9Claims

0Family size

Assignee

Sennheiser electronic GmbH & Co. KG · DE

Inventors

Marios Athineos · New York, US
Eugen Rasumow · Großburgwedel, DE
Alexander Krüger · Hannover, DE
Alexander Nowak · Hannover, DE

Key dates

Filing date	Apr 28, 2021
Grant date	Jun 6, 2023
Priority date	—
Expiry date	Aug 5, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2400/15
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Microphone arrays comprise several microphone capsules, the outputs of which being electronically combined for directional recording of sound. The directional and frequency properties of the microphone array depend on the number and positions of the microphone array. In order to obtain the smallest possible microphone array with only few microphone capsules, which, however, has an essentially uniform directional and frequency dependence over a speech frequency range, is scalable and robust against small incorrect positioning of the capsules, fifteen or twenty-one microphone capsules (K15,11-K15,35, K21,11-K21,37) are arranged on a carrier such that they lie on three similar branches, each with the same number of microphone capsules, which are rotated against each other by 120°. Each of the microphone capsules lies on a corner of a triangle of a grid in a flat isometric coordinate system with three axes rotated by 120° against each other and forming the grid of equilateral triangles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.