The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2015
Filed:
Mar. 05, 2009
Toshiki Hanyu, Tokyo, JP;
Toshiki Hanyu, Tokyo, JP;
NIHON UNIVERSITY, Tokyo, JP;
Abstract
Provided is an acoustic measurement device capable of reducing the number of microphones while solving a problem of the dependency of interval between microphones on the frequency. The acoustic measurement device comprises a sound reception section () and a calculation section (). The sound reception section includes a plurality of unidirectional microphones. The plurality of microphones of the sound reception section () are arranged such that the total sum of the unit vectors each facing the maximum sensitivity direction of the microphone is zero. The calculation section () calculates a particle velocity vector or acoustic intensity by multiplying respective unit vectors by measurement values of each of the plurality of microphones of the sound reception section and calculates acoustic information by vector-synthesizing the results.