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:
Jan. 30, 2018
Filed:
Sep. 19, 2014
Clarion Co., Ltd., Saitama-shi, JP;
Takeshi Hashimoto, Motomiya, JP;
Kazutomo Fukue, Saitama, JP;
Tetsuo Watanabe, Hasuda, JP;
Yasuhiro Fujita, Kashiwa, JP;
CLARION CO., LTD., Saitama-Shi, JP;
Abstract
A sound field measuring device () obtains frequency characteristics by collecting output sound outputted from a pair of speakers () installed at a narrow interval. A low-pass filter () extracts low-range components of a first measurement signal. A high-pass filter () extracts mid/high-range components of a second measurement signal different from the first measurement signal. A combined signal generation unit () generates a combined signal by combining the low-range components of the first measurement signal and the mid/high-range components of the second measurement signal. An external output unit () outputs the first measurement signal to an audio system (). A microphone () collects the first measurement signal and the combined signal simultaneously outputted from the pair of speakers. A Fourier transform unit () obtains the frequency characteristics of a sound field by Fourier transforming the signals collected.