Abstract: Described herein is an apparatus and method for estimating the amount of power that is to be consumed by an amplifier. An estimation section may be determined based on frame data of an input signal that is to be input to the amplifier. The estimation section may be stored to in a predetermined section, and the amount of power to be consumed by the amplifier may be estimated in advance based on the stored signal. The predetermined section may be determined in consideration of response a characteristic of a power supply of the amplifier. The amount of power may be calculated by assigning weight to the stored signal.

Abstract: A sound enhancement apparatus and method which produce low IMD over a broadband frequency region and performs BSE to offer a sound which is natural to the human ears, are provided. The sound enhancement apparatus includes a preprocessor, a BSE signal generator, and a gain controller. The preprocessor divides a source signal into a high-frequency signal and a low-frequency signal and analyzes the low-frequency signal to obtain prediction information regarding a degree of distortion that will be generated by the low-frequency signal. The BSE signal generator generates a higher harmonic signal for the low-frequency signal as a BSE signal to be substituted for the low-frequency signal, wherein the order of the higher harmonic signal is adjusted based on the prediction information regarding the degree of distortion. The gain controller adjusts a synthesis ratio of the low-frequency signal and the BSE signal adaptively depending on the prediction information regarding the degree of distortion.

Abstract: Disclosed are an apparatus and method for creating an acoustic radiation pattern, which may improve sound focusing performance to a target position. The acoustic radiation pattern creating apparatus may process an input signal which may be output through a speaker array in a room such that at least one vertical-directional reflected wave component of the input signal may overlap a direct sound of the input signal at the target position. Then, the acoustic radiation pattern creating apparatus may replicate the processed input signal by the number of output channels of the speaker array, and may process the replicated input signals such that the replicated input signals may form a predetermined radiation pattern in a horizontal direction in the room when the replicated input signals are output through the speaker array.

Abstract: An apparatus for generating directional sound is provided. By using a time-variant beam pattern, the apparatus may generate constant direct waves in a listening area and may vary reflected waves followed by the direct waves according to time. The apparatus may convolute the time-variant beam pattern with a sound signal, may process an acoustic signal, which may be obtained through convolution, into a multi-channel signal, and may amplify and output the multi-channel signal.

Abstract: A sound focusing technique is provided to transfer sound to a particular direction. In a sound focusing apparatus, first and second speakers may be arranged to emit sound in opposite directions to form a sound zone. An amplitude and/or a phase of a received signal may be adjusted by a signal processing unit to assign the received signal and the adjusted signal to the first and second speakers, respectively.

Abstract: Described herein is an apparatus and method for estimating the amount of power that is to be consumed by an amplifier. An estimation section may be determined based on frame data of an input signal that is to be input to the amplifier. The estimation section may be stored to in a predetermined section, and the amount of power to be consumed by the amplifier may be estimated in advance based on the stored signal. The predetermined section may be determined in consideration of response a characteristic of a power supply of the amplifier. The amount of power may be calculated by assigning weight to the stored signal.

Abstract: Provided are an apparatus and method for controlling an acoustic radiation pattern output through an array of speakers. The apparatus stores a plurality of filter values for forming a plurality of corresponding control patterns set in advance from an input signal. The apparatus forms a compensation control pattern such that signals output through the array of speakers have an intended pattern in consideration of a filter value of a focusing filter. The apparatus selects at least one of the control patterns set in advance to form the compensation control pattern, and processes the input signal using a filter value corresponding to the selected control pattern.

Abstract: A technology for controlling acoustic energy distribution in a control region is provided. A sound processing apparatus includes a control filter such that a controllable sound zone is formed in the control region, and the sound processing apparatus synthesizes the control filter and an input signal to transfer sound to a desired location or a specific user. The numbers, the size and the locating positions of the sound zone and/or the control region may be controlled.

Abstract: Provided are apparatus and method for focusing sound so that a sound radiation pattern output from an array speaker system composed of a plurality of speakers may approach a target sound radiation pattern. The sound focusing apparatus uses a focusing filter formed in consideration of sound characteristics of the array speaker system. In addition, the sound focusing apparatus may compensate for delay and gain values of each channel generated when an input signal is replicated to a plurality of channels and output through an array speaker in the array speaker system.

Abstract: An apparatus and method for generating directional sound are provided to output sound towards a specific sound zone. The apparatus includes an internal loudspeaker array having at least one sound source and edge loudspeakers, each with a sound source having directivity, located at respective ends of the internal loudspeaker array.

Abstract: Disclosed are an apparatus and method for controlling output distortions of an amplifier. The apparatus for controlling output distortions of an amplifier, includes a compensation signal generator to predict a fluctuation of a supply voltage of a power supply using a prediction model which reflects fluctuations characteristics of the supply voltage, and to generate a compensation signal based on the prediction, and a compensator to transform an input signal using the compensating signal to control the output distortions.

Abstract: A directional sound generating apparatus and a directional speaker array including the same are disclosed. The directional sound generating apparatus includes a sound transducer, a reflection plate which is located behind the sound transducer, and a blocking plate which is provided between a front portion and a back portion of the sound transducer.

Abstract: A speaker includes a housing; a support assembly installed on the lower end of the housing to support the housing; at least one first speaker unit installed in the housing to reproduce a sound signal; and a second speaker unit installed in the support assembly to reproduce a sound signal which belongs to a low sound band. Openings are defined through both sides of the support assembly to transmit to the outside sound reproduced by the second speaker unit. A guide cone is provided to the lower end of the support assembly to guide sound toward the openings. The speaker unit can be installed in a baffle which is supported at the opened front end of the housing to be rotated about a vertical axis. Through rotating the baffle, the speaker unit can be actually rotated within a predetermined range to change a sound transmission direction.

Abstract: Provided are a method and apparatus for controlling a sound field through an array speaker. The method includes calculating a coefficient of a filter that controls sound pressure of an input signal, based on a sound pressure ratio of a suppression area that suppresses sound emitted from an array speaker and an emphasis area that emphasizes the sound, and sound pressure efficiency in the emphasis area, generating a plurality of output signals that focuses the sound to the emphasis area by filtering the input signal based on the calculated coefficient of the filter, and outputting a sound field controlled sound based on the generated plurality of output signals. Accordingly, a listener in a predetermined direction and distance from the array speaker can clearly hear sound, without wearing an earphone or a headset so as to focus the sound only to the listener.

Abstract: Disclosed are vitamin C derivatives linked with a peptide or a pharmaceutically acceptable salt thereof, a method of preparing the same, and a composition comprising the same.

Abstract: A speaker system includes a body unit, a front panel slidably coupled to a front surface of the body unit, a first speaker unit that is provided on the front surface the body unit to output sound, and a second speaker unit that is provided on a rear surface of the front panel to output sound.

Abstract: A speaker includes a housing; a support assembly installed on the lower end of the housing to support the housing; at least one first speaker unit installed in the housing to reproduce a sound signal; and a second speaker unit installed in the support assembly to reproduce a sound signal which belongs to a low sound band. Openings are defined through both sides of the support assembly to transmit to the outside sound reproduced by the second speaker unit. A guide cone is provided to the lower end of the support assembly to guide sound toward the openings. The speaker unit can be installed in a baffle which is supported at the opened front end of the housing to be rotated about a vertical axis. Through rotating the baffle, the speaker unit can be actually rotated within a predetermined range to change a sound transmission direction.