Abstract: An active noise control system selects one reference sensor providing a reference signal with the largest coherence to a noise signal, among a plurality of available reference sensors, as a first entry of a reference sensor set. After selecting the first entry, the active noise control system repeats a process in which a sensor capable of providing the largest information quantity to a current reference sensor set among remaining sensors is selected as a new entry of a reference sensor set, until a desired number of sensors is reached or a desired control level is reached. When the reference sensor set is determined, the active noise control system utilizes the entries of the reference sensor set to generates a noise control signal suitable for canceling the noise signal.

Abstract: An active noise control apparatus of vehicles capable of making it difficult for a passenger in a vehicle to hear the voice of another passenger, achieving privacy protection, and a method of controlling the same are disclosed. The active noise control method includes primarily determining a noise level based on a first microphone signal input through a microphone corresponding to a first seat, secondarily determining whether to output an anti-noise signal generated based on the first microphone signal and the magnitude of the anti-noise signal based on the noise level and the level of the first microphone signal, and outputting the anti-noise signal through a headrest speaker of a second seat in response to the secondary determining.

Abstract: A sound control device mounted in a vehicle and control method include measuring a drive signal input to a speaker, wherein the drive signal is generated in response to an input signal including at least one of a noise control signal and an audio signal, estimating a state of a voice coil of the speaker including at least one of displacement and temperature of the voice coil, based on the drive signal and a model of the speaker, and adjusting the input signal based on the state of the voice coil.

Abstract: An active noise control system selects one reference sensor providing a reference signal with the largest coherence to a noise signal, among a plurality of available reference sensors, as a first entry of a reference sensor set. After selecting the first entry, the active noise control system repeats a process in which a sensor capable of providing the largest information quantity to a current reference sensor set among remaining sensors is selected as a new entry of a reference sensor set, until a desired number of sensors is reached or a desired control level is reached. When the reference sensor set is determined, the active noise control system utilizes the entries of the reference sensor set to generates a noise control signal suitable for canceling the noise signal.

Abstract: A method for controlling a sound control device in a vehicle includes obtaining at least one of a reference signal obtained from a sensor or an error signal obtained from a sound signal of a microphone, estimating a road surface environment corresponding to a road surface on which the vehicle is traveling based on the reference signal, and adjusting a gain for generating a noise control signal having a magnitude within a preset range based on at least one of the road surface environment or the error signal.

Abstract: The present disclosure provides a computer-implemented method for sound masking. The method includes identifying one class among a plurality of classes based on frequency characteristics of a voice of a first occupant in a vehicle, obtaining reference voice data corresponding to the identified class, generating a personalized masking sound for the first occupant by synthesizing the reference voice data with white noise, and controlling an output of the personalized masking sound.

Abstract: A sound control device and a method for controlling the sound control device provided in a vehicle. The method comprises obtaining an input signal including at least one of a reference signal of an accelerometer or an error signal obtained from a sound signal of a microphone; adjusting low frequency components of the input signal based on magnitudes of the low frequency components of the input signal and a preset reference magnitude; generating a noise control signal based on the adjusted input signal; and transmitting the noise control signal so that a speaker outputs the noise control signal.

Abstract: An active noise control apparatus of vehicles capable of making it difficult for a passenger in a vehicle to hear the voice of another passenger, achieving privacy protection, and a method of controlling the same are disclosed. The active noise control method includes primarily determining a noise level based on a first microphone signal input through a microphone corresponding to a first seat, secondarily determining whether to output an anti-noise signal generated based on the first microphone signal and the magnitude of the anti-noise signal based on the noise level and the level of the first microphone signal, and outputting the anti-noise signal through a headrest speaker of a second seat in response to the secondary determining.

Abstract: A sound control apparatus for a vehicle is capable of implementing a separated sound zone in response to a change in position of a passenger's head. A separated sound zone control method for a vehicle includes determining a current position of the passenger's head, and when the determined current head position corresponds to a predicted head position, outputting an output sound datum corresponding to the predicted head position through a plurality of speakers, where the output sound datum is selected by applying a sound data sample to a control filter set configured to form a separated sound zone corresponding to the predicted head position.

Abstract: A pedestrian warning system for an eco-friendly vehicle may include a warning sound controller including an alarm sound controller and a virtual engine sound system configured to inform a pedestrian of a behavior of the vehicle; and an alarm sound output device including not only an amplifier for amplifying a pedestrian alarm sound and a virtual engine sound, but also a directional speaker for outputting the amplified pedestrian alarm sound and the amplified virtual engine sound.

Abstract: A pedestrian warning system for an eco-friendly vehicle may include a warning sound controller including an alarm sound controller and a virtual engine sound system configured to inform a pedestrian of a behavior of the vehicle; and an alarm sound output device including not only an amplifier for amplifying a pedestrian alarm sound and a virtual engine sound, but also a directional speaker for outputting the amplified pedestrian alarm sound and the amplified virtual engine sound.

Abstract: A pedestrian warning system for an eco-friendly vehicle may include a warning sound controller including an alarm sound controller and a virtual engine sound system configured to inform a pedestrian of a behavior of the vehicle; and an alarm sound output device including not only an amplifier for amplifying a pedestrian alarm sound and a virtual engine sound, but also a directional speaker for outputting the amplified pedestrian alarm sound and the amplified virtual engine sound.

Abstract: A pedestrian warning system for an eco-friendly vehicle may include a warning sound controller including an alarm sound controller and a virtual engine sound system configured to inform a pedestrian of a behavior of the vehicle; and an alarm sound output device including not only an amplifier for amplifying a pedestrian alarm sound and a virtual engine sound, but also a directional speaker for outputting the amplified pedestrian alarm sound and the amplified virtual engine sound.

Abstract: Disclosed is a technique for localizing a sound source. In the technique, a sound pressure signal measured by microphones is acquired using a spherical microphone array sensor where the microphones are fixedly arranged on a surface of a spherical body. A sound pressure distribution on the surface of the spherical body is obtained by a controller from a sound pressure calculation formula for calculating a sound pressure at a certain location of a spherical surface using the sound pressure signal measured by the microphones as an input value. A location of the sound source is estimated from the obtained sound pressure distribution.

Abstract: Disclosed is a technique for localizing a sound source. In the technique, a sound pressure signal measured by microphones is acquired using a spherical microphone array sensor where the microphones are fixedly arranged on a surface of a spherical body. A sound pressure distribution on the surface of the spherical body is obtained by a controller from a sound pressure calculation formula for calculating a sound pressure at a certain location of a spherical surface using the sound pressure signal measured by the microphones as an input value. A location of the sound source is estimated from the obtained sound pressure distribution.