Mitsubishi Electric Corporation

Asako Omote

Takahisa Aoyagi

Takuya Taniguchi

Noritaka Kokido

Yoichi Kato

Satoru Inoue

Takashi Yamazaki

Mutsuo Sekiya

Masaru Kimura

Tatsuya Mitsugi

Yoshihiko Mori

Bunkei Matsuoka

Ryotaro Suzuki

Youichi Kato

A sound quality adjustment apparatus of an approaching vehicle audible system that generates a signal of a notification sound, which is emitted from a sounding device provided in an electric vehicle that generates at least part of driving force by use of a motor to the outside of the electric vehicle, is provided with a sound element storage unit that stores sound element data forming an element of the notification sound; a sound-source sound quality extraction unit that analyzes the sound element data so as to extract a characteristic value related to the sound quality of a sound element; a parameter setting unit that obtains a parameter for converting the sound element data in accordance with vehicle information, by use of the characteristic value extracted by the sound-source sound quality extraction unit; and a parameter storage unit that stores the parameter obtained by the parameter setting unit.

Sound quality adjustment apparatus of approaching vehicle audible system, approaching vehicle audible system simulator, and approaching vehicle audible system

A notification sound control unit () of an approaching vehicle audible system (), generating a signal for a notification sound to be emitted from a sounding device () provided in an electric vehicle () in which at least part of driving force is produced by a motor to the outside of the electric vehicle (), is provided with a behavior conversion processing section () that changes through time change processing an accelerator opening degree signal () among vehicle information signals () of the electric vehicle () so as to output a processed accelerator opening degree signal and with a notification sound signal generation processing section () that changes a pitch and a volume of a sound element signal outputted from a sound element (), based on the processed accelerator opening degree signal, so as to generate a notification sound signal.

Notification sound control unit of approaching vehicle audible system

An audio signal processing deviceincludes a period detecting unitfor detecting the fundamental period of an input audio signal; a square wave generating unitfor generating, according to the fundamental period the period detecting unitdetects, a square wavewhose period is an integer multiple of the fundamental period; an amplitude correction coefficient generating unitfor calculating an amplitude correction coefficientapproximately equal and proportional to the intensity of the input audio signal; a first multiplierfor generating an amplitude-corrected square waveby multiplying the square waveby the amplitude correction coefficient; and an adderfor adding the amplitude-corrected square waveto the input audio signal

Audio signal processing device

A notification sound control unit of an approaching vehicle audible system includes a first rotation speed calculation section that calculates a first rotation speed, based on an accelerator opening degree signal of an electric vehicle, a second rotation speed calculation section that calculates a second rotation speed, based on a vehicle speed signal of the electric vehicle, a rotation speed synthesis section that synthesizes the first rotation speed and the second rotation speed, a virtual engine rotation speed calculation section that applies filtering processing to a synthesis rotation speed synthesized by the rotation speed synthesis section so as to calculate a virtual engine rotation speed, and a notification sound signal generation processing section that changes a pitch and a volume of a phoneme signal outputted from a phoneme, based on the virtual engine rotation speed, so as to generate a notification sound signal.

An artificial engine sound control unit which controls an artificial engine sound which is emitted from a sounding body which is provided at an electric vehicle whose at least a part of drive power is generated by an electric motor, to outside; comprising a speed region determination part which determines a speed region of the electric vehicle and an artificial engine sound generating part, when the speed region determination part determines such that the electric motor of the electric vehicle can be energized and the electric vehicle is stopped, the artificial engine sound generating part controls so as for the sounding body to emit an artificial engine sound, and the artificial engine sound generating part detects such that the electric vehicle comes close to a start running mode, then the artificial engine sound generating part controls the artificial engine sound which is emitted from the sounding body.

Artificial engine sound control unit, approaching vehicle audible system, and electric vehicle having them

A navigation device includes a communication modulefor transmitting and receiving a signal to and from external communication equipment, a tone signal identifying unitfor identifying a push tone signal sent thereto via the communication modulefrom the external communication equipment, and a voice recognition unitfor performing voice recognition on a voice signal sent thereto via the communication modulefrom the external communication equipment by using information identified by the tone signal identifying unit

Navigation device

A sound-directed-outside-vehicle emitting device includes a storage unit-A for storing criteria by each of which to determine whether or not a running zone is a high-risk zone, each of the criteria describing a status of the vehicle, and a navigation device-A for acquiring information showing a status of the vehicle. The sound-directed-outside-vehicle emitting device compares the information acquired by the navigation device-A with the criteria stored in the storage unit-A to determine whether the above-mentioned vehicle is running through a high-risk zone, and does not stop the output of a warning sound when determining that the vehicle is running through a high-risk zone even if a switchfor commanding a stop of the output of the warning sound is operated.

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Tokyo, Japan

Asako Omote