Clarion Co

Honda Motor Co., Ltd.

Yasuhiro Fujita

Takeshi Hashimoto

Tetsuo Watanabe

Kazutomo Fukue

Kenji Kono

Takatomi Kumagai

Hideyuki Morita

Toru Takahashi

Tatsuya Noda

Takashi Wakui

A vibration signal generation apparatus includes an absolute value signal generator configured to generate an absolute value signal by detecting an absolute value of amplitude of an acoustic signal, an envelope signal generator configured to generate an envelope signal by detecting an envelope of the absolute value signal, a differentiator configured to differentiate the envelope signal, an amplitude limiter configured to generate an amplitude-limited signal by limiting amplitude of the envelope signal so that an amplitude value of the differentiated envelope signal becomes zero or greater, and a vibration signal generator configured to generate a vibration signal by multiplying the amplitude-limited signal by a reference signal having a frequency that allows a human to perceive a vibration.

Vibration signal generation apparatus and computer-readable, non-transitory storage medium storing vibration signal generation program

A rotating electric machine includes a rotor and a stator. The rotor includes: a rotor core having a refrigerant flow path; and an end surface plate arranged at least on one side of the rotor core. The refrigerant flow path includes: a first refrigerant flow path; and a second refrigerant flow path which is disposed further on a radial inner side than the first refrigerant flow pat. The stator includes: a stator core; and a coil end portion protruding from at least one side of the stator core. The end surface plate includes: a root side refrigerant supply portion which communicates with the first refrigerant flow path and supplies the refrigerant to a root region of the coil end portion; and a distal side refrigerant supply portion which communicates with the second refrigerant flow path and supplies the refrigerant to a distal region of the coil end portion.

Rotating electric machine

A frequency compressor of a vibration output apparatus generates a compressed signal by converting frequency components of a mid-band signal into low-band frequency components of a low-band signal by increasing the total number of samples by a factor of n and thus compressing the frequency of amplitude information included in mid-band frequency components of the mid-band signal to 1/n. If the level of a low-band envelope signal is lower than a predetermined threshold level, a vibration signal generator generates a vibration signal by combining the compressed signal with the low-band signal consisting of the low-band frequency components of an acoustic signal. If the level of the low-band envelope signal is higher than the predetermined threshold level, the vibration signal generator generates a vibration signal by directly using the low-band signal. A vibration output unit outputs a vibration on the basis of the generated vibration signal.

Vibration output apparatus and computer-readable, non-transitory storage medium storing vibration output program

A notification apparatus () includes a first signal converter () disposed in a cushion of a seat () and configured to convert a vibration transmitted to the seat () into a seat vibration signal, a second signal converter () disposed in a position other than the cushion and configured to detect a transmitted vibration and to convert into an input vibration signal, a level difference calculator () configured to calculate a signal level difference &#x394;G by subtracting a signal level of the seat vibration signal from a signal level of the input vibration signal, a notification aspect determination unit () configured to determine a notification aspect for making a notification to a user, on the basis of a value of the signal level difference &#x394;G, and a notification execution unit () configured to, when acquiring notification information, make the notification on the basis of the notification aspect.

Notification apparatus and notification method

To allow an alarm vibration generated by a vibration generator to be recognized by a user through a vibration transmission member. A vehicle alarm device () includes a vibration generator () configured to generate an alarm vibration having a frequency corresponding to a frequency of a received alarm signal, a vibration transmission member () configured to transmit the alarm vibration to a user, a travel situation information acquisition unit () configured to acquire travel situation information in accordance with a travel situation of the vehicle, and an alarm signal generator () configured to generate the alarm signal such that when the value of the acquired travel situation information is high, a signal to be inputted to the vibration generator () includes at least a high-band frequency and such that when the value of the travel situation information is low, the signal to be inputted to the vibration generator () includes at least a low-band frequency.

Vehicle alarm device and vehicle alarm method

A vibration generation device () includes a frequency information recorder () configured to record frequency values of inputted measurement signals such that the frequency values are associated with measurement positions of vibrations on the seat originally generated by the vibration generator () on the basis of the measurement signals and transmitted to the seat by the vibration transmission member and an output signal generator () configured to obtain a frequency value of a measurement position corresponding to a desired position from the frequency information recorder () and to generate an output signal having the frequency value.

Vibration generation device and vibration generation method

Attenuation of output levels is suppressed while interference due to a plurality of vibrators is reduced. An acoustic control deviceperforms correction processing of correcting phase delay characteristics including transmission systems from excitersL andR which are first and second vibrators connected with a rigid body, on acoustic signals SR and SL. Thereafter, the acoustic control devicecontrols the excitersL andR on the basis of the corrected acoustic signals SLand SR

Acoustic device and acoustic control device

Provided is a notification device and notification method that reduce the output and power consumption of an amplifier or the like and allow a user to sufficiently feel the presence or absence of notification through vibration. A notification device () includes a sweep signal generator () configured to generate a detection sweep signal by continuously changing the frequency in a frequency band in which a speaker () can cause a user to feel a signal in the form of vibration, a vibration detector () configured to detect vibration outputted from the speaker (), and a sound measurement unit () configured to detect, as a sweep frequency band, a frequency band in which vibration indicates signal levels equal to or higher than a threshold. The sweep signal generator () generates a resonance sweep signal by changing the frequency in the sweep frequency band and causes the speaker () to generate vibration.

Notification device and notification method

To allow the driver to identify a notification vibration even in a situation in which the notification vibration may be masked depending on the road conditions. A vehicle notification device () randomly extract one of a plurality of pieces of signal data by the number of vibrators (exciters EXto EX), each of the pieces of signal data being different in a combination of an initial frequency and a target frequency and generates a plurality of sweep signals by changing the frequency from the initial frequency to the target frequency of the extracted piece of signal data in cycles. A plurality of notification vibrations whose frequencies change in different frequency ranges are outputted by outputting the generated sweep signals, individually from the vibrators (exciters EXto EX).

Vehicle notification device and vehicle notification method

A propagation delay tune correction apparatus comprising a means for generating a frequency spectrum signal by performing short-term Fourier transform on an audio signal; a means for setting a propagation delay time for each of a plurality of predetermined frequency bands; a means for calculating a phase control amount for each of the plurality of predetermined frequency bands on a basis of the propagation delay time set for each of the plurality of predetermined frequency bands; a means for generating a phase control signal by smoothing the calculated phase control amount for each of the plurality of predetermined frequency bands; a means for controlling a phase of the frequency spectrum signal for each of the plurality of predetermined frequency bands on a basis of the generated phase control signal; and a means for generating an audio signal on which a propagation delay correction is performed by performing inverse short-term Fourier transform on the frequency spectrum signal of which the phase is controlled for each of the plurality of predetermined frequency bands.

Propagation delay correction apparatus and propagation delay correction method

A phase control signal generation device generating a phase control signal for each of frequency bands for an audio signal converted into a frequency domain, the phase control signal generation device comprising: a setting change means that is able to change setting of a propagation delay time for each of predetermined frequency bands; a difference obtaining means that obtains a difference between propagation delay times before and after setting change; an updating means that updates a phase control amount of the frequency band for which the propagation delay time is changed, based on the obtained difference; and a phase control signal generating means that generates a phase control signal of each frequency band by performing a smoothing process for the phase control amount in a frequency domain using the updated phase control amount.

Phase control signal generation device, phase control signal generation method, and phase control signal generation program

There is provided a signal processing device, comprising: a frequency detecting means that detects a frequency satisfying a predetermined condition from an audio signal; an offset means that gives an offset to the detected frequency by the frequency detecting means in accordance with a frequency property at the detected frequency or around the detected frequency; a reference signal generating means that generates a reference signal by extracting a signal from the audio signal based on the detected frequency offset by the offset means; an interpolation signal generating means that generates an interpolation signal based on the generated reference signal; and a signal synthesizing means that performs high band interpolation by synthesizing the generated interpolation signal and the audio signal.

Signal processing device and signal processing method for interpolating a high band component of an audio signal

A sound-field correction device, comprising: a target calculating unit, a correction amplitude characteristic calculating unit and a setting unit. The target calculating unit calculates, based on a predetermined sound signal, a target amplitude characteristic targeted for sound-field correction by a parametric equalizer and a plurality of auxiliary target amplitude characteristics having amplitude characteristics approximately equal to or gentler than the target amplitude characteristic. The correction amplitude characteristic calculating unit calculates a correction amplitude characteristic for correction sound-field based on the calculated target amplitude characteristic and the calculated plurality of auxiliary target amplitude characteristics. The setting unit sets the parametric equalizer based on the calculated correction amplitude characteristic.

Sound-field correction device, sound-field correction method, and sound-field correction program

To make a notification to the driver so that the driver can distinguish or recognize the notification. A vehicle notification device () inputs a first sweep signal whose frequency is changed in a predetermined frequency range, to a vibrator (), calculates frequency characteristics of a vibration in the vehicle interior, detects a frequency range in which the signal level of vehicle-travel-time frequency characteristics is higher than the signal level of vehicle-stop-time frequency characteristics by a predetermined level amount or more, generates a second sweep signal whose frequency is changed in a range obtained by excluding the detected frequency range from the predetermined frequency range of the first sweep signal, and outputs the second sweep signal from the vibrator ().

A signal processing device comprises: a band detecting means for detecting a frequency band which satisfies a predetermined condition from an audio signal; a reference signal generating means for generating a reference signal in accordance with a detection band by the band detecting means; a reference signal correcting means for correcting the generated reference signal on the basis of a frequency characteristic thereof; a frequency band extending means for extending the corrected reference signal up to a frequency band higher than the detection band; an interpolation signal generating means for generating an interpolation signal by weighting each frequency component within the extended frequency band in accordance with a frequency characteristic of the audio signal; and a signal synthesizing means for synthesizing the generated interpolation signal with the audio signal.

Growing community of inventors

Kashiwa, Japan

Yasuhiro Fujita