Abstract: A vehicle includes: a housing; a passive radiator disposed on a rear surface of the housing; an active speaker disposed on a front surface of the housing and configured to output a virtual engine sound; a partition wall disposed inside the housing such that one side is in contact with the left side surface of the housing and the other side is in contact with the right side surface of the housing; a driver configured to move and rotate the partition wall; and a controller configured to control the driver based on at least one of a transmission position of the vehicle and a speed of the vehicle.

Abstract: An energy storage system comprises: an alternating-current/direct-current converter; a battery; a booster; a direct-current/alternating-current converter; a power control unit; an inductor having one terminal connected to a supply terminal to which normal alternating-current power is supplied; a switching unit having one terminal connected to the other terminal of the inductor and having the other terminal connected to an input/output terminal; a current determination unit which compares an inductor current flowing through the inductor with a power recovery limit current determined by a user; and a switching control unit.

Abstract: An acoustic communication system and a data transmission and reception method thereof are provided. The acoustic communication system may include a transmitter configured to generate data to be transmitted as an acoustic signal using a multi-tone encoding technique in a vehicle and output the generated acoustic signal and a receiver configured to receive the acoustic signal, decode the received acoustic signal using a multi-tone decoding technique, analyze the decoded acoustic signal, and output a warning signal.

Abstract: An energy storage system comprises: an alternating-current/direct-current converter; a battery; a booster; a direct-current/alternating-current converter; a power control unit; an inductor having one terminal connected to a supply terminal to which normal alternating-current power is supplied; a switching unit having one terminal connected to the other terminal of the inductor and having the other terminal connected to an input/output terminal; a current determination unit which compares an inductor current flowing through the inductor with a power recovery limit current determined by a user; and a switching control unit.

Abstract: A vehicle and a method of controlling the same maintain a constant resonant frequency of an enclosure even when the external and internal temperature of the vehicle changes by changing the length or cross-sectional area of a port of an enclosure provided in the vehicle. The vehicle includes a first sensor that measures an external temperature of the vehicle, a housing, and a speaker that is provided inside the housing and arranged to face an opening formed at one surface of the housing. A pipe is provided in the housing and arranged to have an opening thereof face a hole formed at the one surface of the housing. A driving part changes a volume of the pipe and a controller operates the driving part to change the volume of the pipe based on the external temperature of the vehicle.

Abstract: A vehicle and a method of controlling the same maintain a constant resonant frequency of an enclosure even when the external and internal temperature of the vehicle changes by changing the length or cross-sectional area of a port of an enclosure provided in the vehicle. The vehicle includes a first sensor that measures an external temperature of the vehicle, a housing, and a speaker that is provided inside the housing and arranged to face an opening formed at one surface of the housing. A pipe is provided in the housing and arranged to have an opening thereof face a hole formed at the one surface of the housing. A driving part changes a volume of the pipe and a controller operates the driving part to change the volume of the pipe based on the external temperature of the vehicle.

Abstract: A vehicle includes: a housing; a passive radiator disposed on a rear surface of the housing; an active speaker disposed on a front surface of the housing and configured to output a virtual engine sound; a partition wall disposed inside the housing such that one side is in contact with the left side surface of the housing and the other side is in contact with the right side surface of the housing; a driver configured to move and rotate the partition wall; and a controller configured to control the driver based on at least one of a transmission position of the vehicle and a speed of the vehicle.

Abstract: An acoustic communication system and a data transmission and reception method thereof are provided. The acoustic communication system may include a transmitter configured to generate data to be transmitted as an acoustic signal using a multi-tone encoding technique in a vehicle and output the generated acoustic signal and a receiver configured to receive the acoustic signal, decode the received acoustic signal using a multi-tone decoding technique, analyze the decoded acoustic signal, and output a warning signal.

Abstract: A speaker device for a vehicle includes a speaker unit, an enclosure mounted to a vehicle body accommodating the speaker unit, and provided with an inner space which is divided into a front space into which a front sound of the speaker unit is radiated and a rear space into which a rear sound of the speaker unit is radiated by a division member, a first path connecting the front space to a first division space provided in the vehicle body, a second path connecting the rear space to a second division space provided in the vehicle body, and a front sound outlet connecting the front space to an indoor space of the vehicle.

Abstract: A speaker device for a vehicle includes a speaker unit, an enclosure mounted to a vehicle body accommodating the speaker unit, and provided with an inner space which is divided into a front space into which a front sound of the speaker unit is radiated and a rear space into which a rear sound of the speaker unit is radiated by a division member, a first path connecting the front space to a first division space provided in the vehicle body, a second path connecting the rear space to a second division space provided in the vehicle body, and a front sound outlet connecting the front space to an indoor space of the vehicle.