An apparatus for outputting a virtual engine sound includes: an output device that outputs the virtual engine sound; a bumper beam connected to a rear surface of the output device; and a bumper foam connected to the output device and the bumper beam while opening left and right side surfaces of the output device. The apparatus for outputting a virtual engine sound may improve a virtual engine sound output efficiency by utilizing a sound pressure radiated from a side surface of the virtual engine sound output device.

A secondary horn system for a vehicle includes a processor and a memory communicably coupled to the processor and storing a secondary horn system control module. The control module may include instructions that when executed by the processor cause the processor to determine a presence of an alert space along a projected path of the vehicle and, responsive to a determination of the presence of an alert space, control operation of a secondary horn system to transmit a sound into the alert space. The system may provide for autonomous operation of the secondary horn system in certain driving situations, thereby easing demands on the driver and enhancing driver safety.

A vehicle output simulation system is applied to an electric vehicle including a motor and a power supply. The vehicle output simulation system includes a storage module, a control panel, a motor control module, a speaker device, and a host computer. The storage module stores a simulation setting including an acceleration curve characteristic datum and a sound effect. The control panel selects operations, and outputs a control command. The motor control module controls the motor and the power supply according to the acceleration curve characteristic datum. The speaker device outputs the sound effect corresponding to the control command.

A method and circuit for controlling a multi-use horn by a bus are disclosed. The circuit comprises a bus signal receiving and transmitting unit used for receiving and transmitting a horn control instruction from a vehicle-mounted computer controller by the bus, a control unit used for generating a horn sounding signal adapting to a current scene according to the horn control instruction, and a horn sounding unit used for making sounds according to the horn sounding signal. By adoption of the method and circuit, the horn is connected to the vehicle-mounted computer controller by the bus and is controlled by the vehicle-mounted computer controller to make sounds, and thus, sound requirements for various horns for different uses on vehicles and engineering machines are met.

The present disclosure is directed to methods, devices, and systems for playing audio signals associated with an electric in vehicle. The method includes, for example, (1) determining a speed of the electric vehicle; (2) receiving, from a memory, a plurality of sound frequency characteristics corresponding to the determined speed of the electric vehicle; and (3) generating an audio signal segment corresponding to the received sound frequency characteristics by a speaker of the electric vehicle. The sound frequency characteristics include a plurality of segments. Each of the segments includes an amplitude of a number of frequency characteristics in a sound produced by a powertrain assembly (e.g., an electric motor) in a speed range.

A method for generating an audio signal representing the dynamic state of a land vehicle as a function of the value of at least one first parameter comprises the steps of receiving an input audio signal and dividing the input audio signal into a set of audio frames of given duration; selecting, an audio frame representing the input audio signal; subdividing the selected audio frame into a set of audio sub-frames; determining a probability of transition between orderly pairs of the audio sub-frames and synthesizing the audio signal representing the dynamic state of a land vehicle by generating a sequence of audio sub-frames; computing a centre frequency of the selected audio frame and carrying out a frequency shift of the centre frequency as a function of the centre frequency of the selected audio frame and of the value of at least one first parameter that indicates the dynamic state of the vehicle, thereby generating a frequency-shifted subsequent audio sub-frame.

A pedestrian warning device, comprising a warning device body having a cavity and an open end portion, and a sound-generating device mounted inside the cavity, wherein the pedestrian warning device further comprises a grille cover arranged on the end portion of the warning device body; the grille cover comprises at least two grille layers spaced at intervals from the inside to the outside, each of the grille layers comprising a plurality of crossbeams, the crossbeams being arranged at intervals so as to form gaps to enable gas to flow between adjacent crossbeams, and wherein a width of the gaps is not greater than a width of the crossbeams, and the crossbeams of adjacent grille layers are interleaved with each other. The grille cover can protect internal component of the pedestrian warning device and will not affect the performance of the pedestrian warning device.

The invention relates to a method for operating a sound output device of a motor vehicle. A voice-analysis and control device receives a voice signal from a voice detection device of the motor vehicle, wherein the received voice signal describes a voice message from a person who is in exterior surroundings of the motor vehicle. The voice signal is used to ascertain a voice message content of the voice message and a thematic context of the voice message. On the basis of that, a voice output signal is provided that describes a context-related response text for the captured voice message, and the provided voice output signal is transmitted to the sound output device to output the provided voice output signal to the exterior surroundings of the motor vehicle.

Techniques for using beam-formed acoustic notifications for pedestrian notification are described. Computing device(s) can receive sensor data associated with an object in an environment of a vehicle. The computing device(s) can determine first data for emitting a first beam of acoustic energy via speaker(s) of an acoustic array associated with the vehicle, and second data for emitting a second beam of acoustic energy via speakers of the acoustic array. The computing device(s) can cause the speaker(s) to emit the first beam in a direction of the object at a first time and the second beam in the direction of the object at a second time. Directions of propagation of the first beam and the second beam are offset so that the object can localize the source the acoustic notification, thereby localizing the vehicle in the environment.

An adaptive noise filtering system and method detect sounds using a sensor onboard a vehicle system. A value of a signal associated with operation of the vehicle system is determined. One or more sounds detected by the sensor are filtered out based on the value of the signal that is determined. Operation of the vehicle system may be controlled using the remaining sound(s).