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:
Apr. 29, 2014
Filed:
Feb. 09, 2011
Taro Iwamoto, Kanagawa, JP;
Taro Iwamoto, Kanagawa, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A sound producing apparatus for a vehicle notifying a vehicle's approach outside the vehicle comprising an original-tone generating portion generating an original tone of a vehicle's approaching sound for recognition of a vehicle's approach, a modulation-tone generating portion generating a modulation tone from the original tone with a comb filter function which is configured to apply gains to frequency components so that a gain to be applied to a specified frequency component of a times-tone row which has frequencies of n-times of a fundamental frequency is greater than that to be applied to the other frequency component than the specified frequency component of the times-tone row, a sound-pressure setting portion setting a sound pressure of the approaching sound of the modulation tone, and a speaker producing outside the vehicle the vehicle's approaching sound of the modulation tone with the set sound pressure.