Abstract: An atomic beam is quantum-mechanically collimated. The atomic beam is irradiated with a pumping laser beam and a filtering laser beam in this order. The pumping laser beam has a wavelength corresponding to a transition between a ground state and an excited state of atoms in the atomic beam. Irradiation with the pumping laser beam causes atoms to make transition from the ground state to the excited state and further relax from the excited state to a metastable state. The filtering laser beam has a wavelength corresponding to a transition between the ground state and the metastable state. By irradiating the filtering laser beam, atoms in the metastable state having velocity components equal to or smaller than a predetermined velocity component ?v in a traveling direction of the filtering laser beam are caused to make transition to the ground state.

Abstract: There are included a first speaker processing step in which a first speaker 2 produces sound based on a first filtered signal, a gain multiplication step in which a gain multiplication unit 4 generates a gain multiplied signal by multiplying a second filtered signal by a gain, a second speaker processing step in which a second speaker 5 produces sound based on the gain multiplied signal, and a gain control step in which a gain control unit 7 controls the gain such that a root mean square of a collected sound signal collected by a microphone 6 installed at a mute position, which is a position at which the sound produced by the first speaker and the sound produced by the second speaker are to be muted, is relatively small.

Abstract: Provided is a technique to generate a call environment that prevents call contents from being heard by a person other than a person speaking on the phone in a case where call voice is output from a speaker. Speakers installed in an automobile are denoted by SP1, . . . , SPN, a first filter coefficient used to generate an input signal for a speaker SPn is denoted by Fn(?), and a second filter coefficient that is different from the first filter coefficient and is used to generate an input signal for the speaker SPn is denoted by {tilde over (?)}Fn(?).

Abstract: Provided is a filter coefficient optimization technology that makes it possible to design a stable beamformer having a good quality by considering the relationship of a filter coefficient between adjacent frequency bins. A filter coefficient optimization apparatus includes an optimization unit that calculates an optimum value of a filter coefficient w={w1, . . .

Abstract: Provided is an acoustic system for a user who uses a seat of an aircraft, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones.

Abstract: A cancellation device according to one aspect of the invention is a cancellation device that cancels noise coming to a region in a vicinity of a loudspeaker, the cancellation device including at least two loudspeakers 1 and one reference microphone 3, in which the cancellation device is configured such that an acoustic signal emitted in a sound emission direction of a same loudspeaker and an acoustic signal emitted in an opposite direction collide with each other, the at least two loudspeakers 1 and the reference microphone 3 are arranged on a same plane, the at least two loudspeakers 1 emit cancellation sound that cancels the noise in synchrony, and the plane is a plane including a boundary between a sound emission direction of the two loudspeakers 1 and a direction opposite to a sound emission direction.

Abstract: Provided is an acoustic system for a user who uses a seat of an aircraft, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones.

Abstract: There is provided an acoustic system for a user who uses a seat of an airplane, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones. An acoustic system including a speaker system including one speaker unit that emits a sound based on an acoustic signal of a predetermined sound source, in which a sound emitted from the speaker unit is hearable in a region to be audible near the speaker unit, and by a sound emitted from the speaker unit in a back surface direction coming around to a front surface direction, the sound emitted from the speaker unit in the front surface direction and the sound emitted from the speaker unit in the back surface direction cancel each other in a region in the front surface direction far from the speaker unit.

Abstract: Provided is an acoustic system for a user who uses a seat of an aircraft, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones.

Abstract: There are provided a detection method, a detection device, and a program that do not cause a difference in events to be detected even when physical characteristics of an acoustic signal change. The detection method includes: a step of acquiring a target sound for detecting an event; and a detecting step of detecting a desired event included in the acquired sound, and in the detecting step, even when any one of a distance and a direction of a sound source of the event, which are based on a position where the target sound is collected, and an occurrence time of the event changes, the events are always detected as the same event.

Abstract: Provided is a technique to generate a call environment that prevents call contents from being heard by a person other than a person speaking on the phone in a case where call voice is output from a speaker. Speakers installed in an automobile are denoted by SP1, ..., SPN, a first filter coefficient used to generate an input signal for a speaker SPn is denoted by Fn (?), and a second filter coefficient that is different from the first filter coefficient and is used to generate an input signal for the speaker SPn is denoted by ~Fn (?).

Abstract: There are included a first speaker processing step in which a first speaker 2 produces sound based on a first filtered signal, a gain multiplication step in which a gain multiplication unit 4 generates a gain multiplied signal by multiplying a second filtered signal by a gain, a second speaker processing step in which a second speaker 5 produces sound based on the gain multiplied signal, and a gain control step in which a gain control unit 7 controls the gain such that a root mean square of a collected sound signal collected by a microphone 6 installed at a mute position, which is a position at which the sound produced by the first speaker and the sound produced by the second speaker are to be muted, is relatively small.

Abstract: A reproduction apparatus that realizes reproduction of which sound leakage is small with use of a speaker installed near a head, and a method and a program thereof are provided. The reproduction apparatus is used in a seat. The reproduction apparatus includes: at least two speakers; an acquisition unit that acquires, from a predetermined sound source, an acoustic signal of which sound is emitted by the reproduction apparatus; and a control unit that controls the acoustic signal acquired by the acquisition unit such that reproduction sound is only transmitted to a first seat and the reproduction sound is not transmitted to a second seat, the speakers each emit sound of the acoustic signal controlled by the control unit, and the speakers are disposed so as to be closer to an ear of a user that sits in the first seat than to the second seat.

Abstract: Provided is a filter coefficient optimization technology that makes it possible to design a stable beamformer having a good quality by considering the relationship of a filter coefficient between adjacent frequency bins. A filter coefficient optimization apparatus includes an optimization unit that calculates an optimum value of a filter coefficient w={w1, . . .

Abstract: Provided is a technology of optimizing a latent variable by solving a convex optimization problem equivalent to a non-convex optimization problem instead of solving the non-convex optimization problem. A latent variable optimization apparatus includes an optimization unit that calculates an optimum value ˜w* of a latent variable ˜w based on an optimization problem min˜w(Lconvex(˜w)+?d=1DLd(˜w)), Lconvex being a strongly convex function relevant to the latent variable ˜w, Ld being a function relevant to the latent variable ˜w, Sd,1, . . . , Sd,C being a region that is obtained by dividing a domain of the function Ld into C closed convex sets, ?d,c being a convex function that is defined on the region Sd,c and that approximates the function Ld, cd being a discrete variable that has a value of 1, . . . , C, the optimization unit calculating the optimum value ˜w* by solving an optimization problem minc_1, . . . , c_D (min˜w(Lconvex (˜w)+?d=1D?d,c_d(˜w))) instead of solving the above optimization problem.

Abstract: There is provided a neural network learning technique for learning a parameter of a probability density function representing the distribution of data with high accuracy using an autoencoder. A neural network learning apparatus, wherein ? is a parameter of a probability density function q?(x) representing distribution of data x, and M? is a neural network that is an autoencoder that learns the parameter ?, the neural network learning apparatus including: a neural network calculation unit that calculates an output value M?(xn) of the neural network from learning data xn using the parameter ? for n=1, . . .

Abstract: There is provided a technique for optimizing a latent variable by using a cost function in which a plurality of probabilistic assumptions are reflected simultaneously. A latent variable optimization apparatus includes an optimization unit which optimizes a latent variable ˜w*, vj(1?j?J) is an auxiliary variable of the latent variable ˜w* expressed as vj=Dj˜w*+bj by using a matrix Dj and a vector bj, a cost term of the auxiliary variable vj is expressed by using a probability distribution of the auxiliary variable vj which is log-concave, and the optimization unit optimizes the latent variable ˜w* by solving a minimization problem of a cost function including the sum of the cost term of the auxiliary variable vj.

Abstract: The present invention is to provide a method for obtaining more efficiently isolated-soy protein, which has excellent gelation properties and shows neither bitterness nor astringency characteristic to soybean, while reducing the amount of water used in a soy protein manufacturing plant and thus lessening burden on the environment owing to the reduction in discharged water. It is a method for producing isolated-soy protein, including: an acid-washing step of washing defatted soybeans with an aqueous medium in a region of pH 3.0 to 5.0 to extract and remove whey components; an extraction step of extracting protein from acid-washed soybean slurry obtained in the acid-washing step with an aqueous medium in a neutral to alkaline region and then removing an extraction residue; and an isolation step of separating the extract solution obtained in the extraction step into water and protein while holding it in the neutral to alkaline region.

Abstract: Disclosed is a cream cheese-like food which is produced by using a soybean protein as a raw material and which has a creamy-smooth mouthfeel like cream cheese and a good flavor/taste. A cream cheese-like food having a creamy-smooth mouthfeel and a good flavor/taste can be produced readily by previously adjusting the soybean protein material to a pH falling within the neutral to alkaline range before reducing the moisture content of a product by reacting the soybean protein with a protease to prepare a soybean protein hydrolysate.

Abstract: The present invention is to provide a method for obtaining more efficiently isolated-soy protein, which has excellent gelation properties and shows neither bitterness nor astringency characteristic to soybean, while reducing the amount of water used in a soy protein manufacturing plant and thus lessening burden on the environment owing to the reduction in discharged water. It is a method for producing isolated-soy protein, including: an acid-washing step of washing defatted soybeans with an aqueous medium in a region of pH 3.0 to 5.0 to extract and remove whey components; an extraction step of extracting protein from acid-washed soybean slurry obtained in the acid-washing step with an aqueous medium in a neutral to alkaline region and then removing an extraction residue; and an isolation step of separating the extract solution obtained in the extraction step into water and protein while holding it in the neutral to alkaline region.