Patent application number | Description | Published |
20110032087 | VEHICLE PRESENCE NOTIFICATION APPARATUS - A vehicle presence notification apparatus generates a notice sound by emitting an ultrasonic wave in mid air based on an ultrasonic signal modulated according to an audible sound. During proceeding in mid air, the modulated ultrasonic wave is self-demodulating to become an audible sound. The audible sound posterior to the self-demodulation has a significant directionality like the ultrasonic wave. The notice sound is thus conveyed mainly to a pedestrian who is present in a dangerous area range where a danger needs to be taught. In addition, the vehicle presence notification apparatus includes a sensor-use ultrasonic transducer device having a transducers. The transducer device serves as a vehicle velocity sensor by transmitting an ultrasonic wave towards a road surface based on an ultrasonic wave signal or modulated ultrasonic wave, thereby enabling the vehicle presence notification apparatus to acquire vehicle velocity information by itself. | 02-10-2011 |
20110175713 | VEHICLE PRESENCE NOTIFICATION APPARATUS - A vehicle presence notification apparatus uses several ultrasonic transducer devices to generate a notice sound by emitting an ultrasonic wave in mid air based on an ultrasonic signal modulated according to an audible sound. At least one of the speaker-use ultrasonic transducer devices is a two-way transducer device that is enabled to perform not only transmission but also reception of an ultrasonic wave. When a vehicle velocity is equal to or greater than a predetermined value, the two-way transducer device is caused to function as an ultrasonic sensor. Thus, even when the generation of any notice sound is unnecessary due to the vehicle velocity being fast, the vehicle presence notification apparatus can be used as an ultrasonic sensor to measure a distance with an obstacle outside of the vehicle. | 07-21-2011 |
20110181442 | VEHICLE PRESENCE NOTIFICATION APPARATUS - A vehicle presence notification apparatus is disclosed to notify a presence of a vehicle by providing easily-perceivable and less uncomfortable notification sound to an outside of the vehicle. The vehicle presence notification apparatus includes: a speaker and a controller. The controller is configured to cause the speaker to generate the notification sound that simultaneously has (i) at least one fundamental high frequency, which is easily sticking to human ears; and (ii) at least one auxiliary low frequency, which is smaller than the at least one fundamental high frequency and has a harmonic relation with the at least one fundamental high frequency. | 07-28-2011 |
20110188663 | ARTIFICIAL ENGINE SOUND GENERATOR - An artificial engine sound generator for producing an artificial engine sound includes: a main body device that defines a predetermined frequency selected in a range between 1 Hz and 10 Hz, and simultaneously generates a plurality of signals having frequencies, which are arranged at intervals of the predetermined frequency, so that the artificial engine sound is formed. In the generator, data for producing the artificial engine sound is minimized, and therefore, a calculation load for producing the artificial engine sound is reduced. | 08-04-2011 |
20110304445 | Vehicle Presence Notification Apparatus - A vehicular horn device of an existing electromagnetic type is used as a dynamic speaker so as to generate a false engine sound. The shortage of a low-pitched sound in a parametric speaker device is complemented with a false engine sound which the vehicular horn device generates. Thereby, without need of mounting a large-sized dynamic speaker such as a woofer in a vehicle, a false engine sound is generated so as to model for a real engine sound. In addition, as the vehicle approaches a pedestrian, a sound tone of the false engine sound which the pedestrian hears changes, enabling the pedestrian to easily notice the approach or presence of the vehicle. | 12-15-2011 |
20120092185 | VEHICULAR ANNUNICIATION DEVICE AND METHOD FOR NOTIFYING PROXIMITY OF VEHICLE - An electromagnetic alarm device includes a current interrupter to interrupt an electricity supply to a coil on application of a self-excited voltage to oscillate a diaphragm with a moving core to generate a first alarm sound including a fundamental tone at a first predetermined frequency, when a switch is manipulated by an occupant. A proximity notification device includes an ultrasonic speaker to emit an ultrasonic wave, which is generated by implementing ultrasonic modulation on a proximity notification sound, to an outside of the vehicle for notifying a pedestrian of proximity of the vehicle, according to a traveling state of the vehicle and/or when a sensor detects a pedestrian. The ultrasonic speaker emits an ultrasonic wave, which is generated by implementing ultrasonic modulation on a second alarm sound including a fundamental tone at a second frequency, when the switch is manipulated. | 04-19-2012 |
20120182136 | VEHICLE APPROACH WARNING APPARATUS - A vehicle (approach) warning apparatus generates a warning sound that is emitted from a parametric speaker and a vehicle horn, by driving the vehicle horn with a rectangular wave signal of 0 volts or more, thereby preventing a power loss due to a counter electromotive force that is caused by an alternation of a plus electric voltage and a minus electric voltage in the horn as well as preventing a problematic distortion of the warning sound from the horn. Further, since the vehicle (approach) warning apparatus is devised to prevent the parametric speaker from generating a low pitch sound of 500 Hz that is reproduced by the horn, an influence of a higher harmonic wave upon a reproduced sound from the parametric speaker is reduced, thereby preventing deterioration of a sound from the parametric speaker. | 07-19-2012 |
20120182137 | VEHICLE WARNING APPARATUS - A vehicle warning apparatus may include a supersonic speaker for outputting a supersonic wave that is equipped in a parametric speaker. The supersonic speaker includes a supersonic vibrator that generates a supersonic wave. A waterproof sheet and louver is arranged to cover a speaker opening in order to protect the supersonic vibrator from water and other foreign particles. Specifically, the waterproof sheet is arranged to cover the speaker opening at a distance L | 07-19-2012 |
20120182138 | VEHICLE PRESENCE NOTIFICATION APPARATUS - A vehicle includes a front grille and a vehicle presence notification apparatus that includes a supersonic speaker, where the vehicle presence notification apparatus is behind the front grille. The front grille includes a plurality of grille bars that may be in a front range of the supersonic speakers. The grille bars that are positioned in the front range of the supersonic speaker includes a curved convex and an upper plate, which have a substantial U shape cross section. The supersonic wave is reflected on an inside surface of one grille bar in a downward direction, and is reflected again on an outside surface of an adjacent grille bar in a forward or frontal direction to output toward a front field of the vehicle. | 07-19-2012 |
20120194328 | VEHICLE APPROACH WARNING APPARATUS - A vehicle warning apparatus has a vehicular horn disposed in an overlapping arrangement with a supersonic speaker, such that the vehicular horn is positioned between the supersonic speaker and a heat exchanger. The vehicular horn blocks the supersonic speaker from heat produced by the heat exchanger, which prevents the temperature of the supersonic speaker from increasing. Accordingly, troubles such as frequency change of supersonic wave output from the speaker and/or decrease of speaker's product life, without deteriorating heat dissipation capacity of the heat exchanger, are prevented. Furthermore, collective arrangement of the supersonic speakers on a single board attached on the vehicular horn improves the install-ability of the vehicle warning apparatus in the vehicle, and improves the directional reach of the supersonic wave. | 08-02-2012 |
20120194329 | SOUND WAVE GENERATOR - A sound wave generator includes a speaker control circuit and a speaker. The speaker control circuit includes a signal generating unit that is configured to generate an electric signal having a humming frequency property. The humming frequency property includes a plurality of frequencies that have an overtone relationship with respect to A Hz and are pitched at the A Hz, the A Hz being a target generation frequency and corresponding to a low pitch frequency in an audible range. The speaker generates a sound wave from the electric signal by applying the electric signal to a vibration plate that produces the sound wave. | 08-02-2012 |
20120223832 | VEHICLE PRESENCE NOTIFICATION APPARATUS - A vehicle presence notification apparatus generates and radiates a pseudo-idling sound outward from a vehicle by way of a vehicular horn and a parametric speaker when the vehicle is in a temporary stop state. Further, the vehicle presence notification apparatus generates from two horizontally-adjacent piezoelectric vibrators, reverse phase supersonic sounds during the temporary stop state. The supersonic sounds generated from two horizontally-adjacent piezoelectric vibrators have the same phase in diagonally right and left directions, thereby acquiring an extended cover range. | 09-06-2012 |
20120229267 | VEHICLE EXISTENCE NOTIFICATION APPARATUS - A vehicle existence notification apparatus disposed in a vehicle includes a sound wave generation unit that transmits a sound wave to an area outside of the vehicle, and a control unit that controls the sound wave generation unit to generate a notification sound. The control unit generates a stopping-vehicle notification sound for notifying existence of a stop condition of the vehicle, and generates a moving-vehicle notification sound for notifying existence of a traveling condition of the vehicle. The simulated idling sound enables a pedestrian to recognize the vehicle when the vehicle is in a stop condition, and the simulated moving-vehicle sound enables the pedestrian to recognize the vehicle when the vehicle is in a traveling condition. | 09-13-2012 |
20120235802 | VEHICLE EXISTENCE NOTIFICATION APPARATUS - A vehicle existence notification apparatus, disposed in a vehicle, emits a notification sound to notify the surrounding area of the approach or presence of the vehicle. The vehicle existence notification apparatus includes a parametric speaker that serves as a supersonic speaker for emitting a supersonic sound wave, where the parametric speaker performs supersonic modulation to a notification sound signal, which produces the notification sound. The parametric speaker also serves as an audible-sound generating piezoelectric speaker that has a primary resonance component that vibrates at a frequency in an audible frequency band. The parametric speaker sets a supersonic modulation frequency of the notification sound to a sound-pressure increase frequency in a supersonic frequency band reproducible by the audible-sound generating piezoelectric speaker, at which a sound pressure increases due to a high order harmonic resonance. | 09-20-2012 |
20120242468 | VEHICLE PRESENCE NOTIFICATION APPARATUS - A vehicle presence notification apparatus may include a dynamic speaker for radiating a notification sound from a vehicle in an audible frequency, and a sound pressure supplement unit is provided to control a sound pressure of the notification sound. The apparatus may further include a parametric speaker for generating a supersonic sound of the notification sound from a supersonic sound generation unit. The supersonic sound is emitted from a sound emission opening. The parametric speaker may further include a reflected sound pressure detecting unit for detecting a sound pressure generated by a reflection of the supersonic sound from the sound emission opening. The sound pressure supplement unit increases the sound pressure of the notification sound radiated by the dynamic speaker based on the sound pressure detected by the reflected sound pressure detecting unit. | 09-27-2012 |
20120294120 | ULTRASONIC SPEAKER, PARAMETRIC SPEAKER HAVING THE SAME AND VEHICLE PROXIMITY ANNUNCIATOR DEVICE HAVING THE SAME - An ultrasonic emission device is accommodated in a housing for generating an ultrasonic wave. The housing has an ultrasonic emission port for emitting the ultrasonic wave from the ultrasonic emission device outward therethrough. A louver is equipped to the ultrasonic emission port. The louver includes multiple louver boards, which are distant from each other. Two of the multiple louver boards adjacent to each other form a clearance therebetween. The clearance includes a horizontal clearance extending along a horizontal direction and an inclined clearance being an ascent inclination toward the ultrasonic emission device. | 11-22-2012 |
20120308056 | THREE-DIMENSIONAL SOUND APPARATUS - Binaural recording stored in a reproducing-use sound source portion is recorded by giving an ultrasonic modulated sound from a recording-use ultrasonic wave speaker to a dummy head. A cross talk is suppressed; thus, the binaural recording is obtained with clear sonic localization information while localization of pronunciation orientation can be improved. Further, the sounds generated by ultrasonic modulating the binaural recording in the reproducing-use sound source portion are given towards left and right ears of a driver from left and right reproducing-use ultrasonic wave speaker units, respectively, arranged at positions distant from the head of the driver. “Sonic 3D information” relative to the localization of pronunciation orientation is given accurately to the ears of the driver. Even in a vehicle compartment tending to provide reflected sounds or muffled sounds, an accurate “sonic localization” can be achieved without a headphone. | 12-06-2012 |
20130034253 | STEREOPHONIC SOUND APPARATUS FOR VEHICLE - A stereophonic sound apparatus for a vehicle includes ultrasonic speakers and a dual channel reproduction unit. The dual channel reproduction unit modulates a sound signal into an ultrasonic modulated sound having ultrasonic wave frequency, and provides the ultrasonic modulated sound toward a passenger through the reproduction ultrasonic speakers for generating a three-dimensional sound. The dual channel reproduction unit is configured to generate a sub localization sound through the reproduction ultrasonic speakers when generating a front localization sound, the front localization sound being a sound perceived to be generated from a position in front of a seat, and the sub localization sound being a sound perceived to be generated from a position different from the position in front of the seat. | 02-07-2013 |
20130076504 | VEHICLE PRESENCE NOTIFICATION APPARATUS - Notice sounds having different sound qualities are generated simultaneously outside a vehicle via an in-vehicle parametric speaker having a first directionality and an in-vehicle dynamic speaker using a vehicular horn unit having a second directionality having a broader emission angle as compared with the first directionality. Both the notice sound via the parametric speaker and the notice sound via the dynamic speaker reach the ears of a person outside the vehicle in different sound pressures based on a difference between the first directionality and the second directionality. A sound tone of a notice sound actually heard by the person outside the vehicle varies according to a travel direction and travel speed of the vehicle. | 03-28-2013 |
20130106590 | VEHICLE PRESENCE NOTIFICATION APPARATUS | 05-02-2013 |
20130106599 | VEHICLE PRESENCE NOTIFICATION APPARATUS | 05-02-2013 |
20130265150 | VEHICLE APPROACH NOTIFICATION UNIT - A vehicle approach notification unit is mounted to a sound tube of an electromagnetic warning device producing a warning sound, and includes a dynamic speaker that produces a notification sound notifying a presence of a vehicle. The dynamic speaker is mounted to the sound tube and outputs the notification sound through the sound tube to outside of the vehicle. The sound tube has a warning sound outlet at an end of the sound tube and a through hole at a position different from the warning sound outlet. | 10-10-2013 |
20130314224 | VEHICLE APPROACH NOTIFICATION UNIT - A vehicle approach notification unit disposed in a vehicle for producing a notification sound outside of the vehicle includes a small speaker producing the notification sound having an audible frequency. The small speaker is disposed on a sound tube of a horn of the vehicle, the horn producing a warning sound. The small speaker emits the notification sound into the sound tube, such that the notification sound is emitted from the vehicle via the sound tube. The small speaker is located in a midstream in a sound passage of the sound tube. | 11-28-2013 |
20130315418 | VEHICLE APPROACH NOTIFICATION UNIT - A vehicle approach notification unit produces a notification sound outside a vehicle when a predetermined driving condition is met to notify an approach of the vehicle. The vehicle approach notification unit has a cavity portion and a small speaker. The cavity portion is disposed to a component of the vehicle and has a sound space therein. The small speaker directly produces the notification sound including an audible frequency. The small speaker is disposed at the cavity portion and emits the notification sound into the sound space of the cavity portion. The cavity portion has a diaphragm or a sound outlet that emits the notification sound from the sound space of the cavity portion outside the vehicle. | 11-28-2013 |
20140015653 | VEHICLE APPROACH NOTIFICATION UNIT - A vehicle approach notification unit is disposed in a vehicle for producing a notification sound. The vehicle approach notification unit has a speaker and a thin film. The speaker is disposed to a sound tube of a vehicle horn of the vehicle. The vehicle horn produces a resonant warning sound with a resonant frequency. The thin film partitions a space between the speaker and the sound tube. The speaker emits the notification sound into the sound tube so that the notification sound is emitted outside of the vehicle via the sound tube. The thin film restricts a sound wave having the resonant frequency from being transmitted, and allows a sound wave having a frequency producing the notification sound to be transmitted. | 01-16-2014 |
20140015654 | VEHICLE APPROACH NOTIFICATION UNIT - A vehicle approach notification unit which notifies an approach of a vehicle has a first notification sound generator and a second notification sound generator. The first notification sound generator produces a notification sound including at least a high-frequency sound forward from the vehicle. The second notification sound generator produces a notification sound including at least a low-frequency sound downward from the vehicle. | 01-16-2014 |
20140016439 | BIRD REPELLENT APPARATUS - A bird repellent apparatus includes a speaker and a speaker control unit. The speaker control unit controls the speaker to emit an ultrasonic sound wave toward a predetermined area such that the ultrasonic sound wave is modulated to an audible frequency while traveling through air to generate a repellent sound with the audile frequency in the predetermined area for repelling birds. | 01-16-2014 |