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:
Mar. 17, 2009
Filed:
Jun. 28, 2005
Osamu Kuroda, Toyota, JP;
Osamu Kuroda, Toyota, JP;
Sango Co., Ltd., Aichi, JP;
Abstract
According to evaluation of tone quality of exhaust sound adapted to human audition, a characteristic of the tone quality of exhaust sound is objectively analyzed. There are provided a measuring process (M) for sampling exhaust sound to be analyzed, by means of a microphone disposed in an exhaust system EX and converting the exhaust sound into an electric signal, an analyzing process (M) for amplifying a high frequency component of the electric signal and performing a frequency analysis of the electric signal at an arbitrary time interval, a detecting process (M) for detecting a first formant of the first peak from the low frequency side and a second formant of the second peak from the low frequency side, and a displaying process (M) for displaying a relationship (brightness and sharpness) between the first formant and second formant in a predetermined time range.