A vehicle approach notifying device for notifying the approach of a vehicle by causing a loudspeaker to output a warning sound includes: a storage that stores a predetermined threshold of sound pressure; and a controller that: (i) causes a loudspeaker disposed outside a cabin of the vehicle to output the warning sound at a first sound pressure determined in accordance with a speed of the vehicle when a sound pressure of the warning sound acquired by a microphone disposed outside the vehicle is less than or equal to the predetermined threshold; and (ii) causes the loudspeaker to output the warning sound at a sound pressure lower than the first sound pressure when the sound pressure of the warning sound acquired by the microphone exceeds the predetermined threshold.

A vehicle-approach notification device includes a sound emitter and at least two ducts. The sound emitter is provided in the vehicle, has an aperture, and is configured to emit a notification sound from the aperture to outside the vehicle. The at least two ducts are provided in the vehicle, have different lengths, and each have an end communicating with the aperture.

A vehicle sound service system and a method thereof are provided. The vehicle sound service system includes a service server including a communication device that may be configured to transmit and receive data with a mobile terminal loaded with a camera and a processing device electrically connected with the communication device. The processing device may be configured to receive an image transmitted from the mobile terminal using the communication device, when the mobile terminal captures the image around a vehicle using the camera and transmits the image, to analyze the received image to estimate a driving place, and to select a sound that matches the estimated driving place and transmits the selected sound to the mobile terminal.

The disclosure relates to a method for operating a motor vehicle having at least one motor-driven electric machine which serves as a traction motor, having the steps of: loading vehicle data of the motor vehicle, which are indicative of a sound emission requirement, feeding a trained artificial neural network with the vehicle data in order to obtain sound emission generator control data, and feeding a sound emission generator of the motor vehicle with the sound emission generator control data.

A method of playing a virtual after-burn sound in an electric vehicle is provided. The method includes acquiring driver tendency information generated based on information of music played in a mobile phone and collecting driving variable information for playing a virtual sound during operation of the electric vehicle. Additionally, characteristics of a virtual after-burn sound are determined based on the collected driving variable information. The characteristics of the virtual after-burn sound are corrected according to the acquired driver tendency information. An after-burn signal is generated for playing the virtual after-burn sound based on information about the corrected characteristics of the virtual after-burn sound and operation of sound equipment is adjusted according to the created after-burn signal such that a virtual after-burn sound discriminated according to the driver tendency is played and output from the sound equipment.

A computer-implemented method performed for alerting the presence of one or more combination vehicles, each comprising a first vehicle unit and one or more second vehicle units and provided with a plurality of alerting units. Each respective first vehicle unit and respective one or more second vehicle units comprises a respective alerting unit out of the plurality of alerting units. The method comprises obtaining movement data indicative of one or both of a current movement or an expected movement of the one or more combination vehicles from at least one data communicating unit comprised in any one of the one or more combination vehicles. The method further comprises determining the current movement and/or the expected movement of the one or more combination vehicles. The method further comprises triggering a sound alert on the plurality of alerting units.

A sound generating apparatus for a vehicle includes: a motor controller that generates a motor torque corresponding to a target sound; and an output device that outputs the target sound based on vibration generated by the motor torque to generate a sound of the vehicle without requiring an external amplifier or a separate actuator, thus preventing increases in cost and weight.

A sound generation apparatus for an electrification vehicle and a method of use thereof are provided. In example embodiments, the sound generation apparatus receives driving information, determines a driving situation based on the driving information, designs an acceleration sound when the driving situation is determined as an acceleration situation, or designs a cornering sound when the driving situation is determined as a cornering situation, and plays and outputs the acceleration sound or the cornering sound.

Provided is a speaker device in which reproduction sound pressure is increased, and heat resistance and water resistance are improved. The speaker device includes: a diaphragm formed of a film containing polyimide; and a frame for supporting the diaphragm. A cross-section passing the center of the diaphragm and parallel to a sound emission direction includes sequentially from an inner periphery to an outer periphery of the diaphragm along the sound emission direction: a first bent plate portion having a concave arc; a second bent plate portion having a convex arc; a third bent plate portion having a concave arc; and a fourth bent plate portion having a convex arc. An area of the first bent plate portion is larger than any of areas of the second, the third, the fourth bent plate portions.

An apparatus includes: a driving route calculator configured to obtain vehicle information about a vehicle and calculate a driving path of the vehicle; an object detector configured to detect an object near the vehicle or the driving path of the vehicle using one or more sensors mounted on the vehicle, and obtain object information on the object; and an acoustic signal processor configured to control a frequency and a volume of an acoustic signal based on the vehicle information and the object information, and transmit the acoustic signal to a speaker mounted on the vehicle.