Abstract: A work machine comprising: a blade; a blade housing; and a guard pole portion provided below the blade, wherein the guard pole portion is supported by the blade housing, and the guard pole portion includes an inclined portion extending in an oblique direction with respect to a machine body longitudinal direction of the work machine.

Abstract: Provided is to prevent a false determination due to an attachment condition of an apparatus that transmits and receives an acoustic signal, and perform accurate personal authentication. A personal authentication device includes: a personal authentication means that authenticates an individual by using first information at least including an acoustic characteristic calculated from an acoustic signal propagating through the head of the user, which is detected by an apparatus being attached on a head of a user for transmitting and receiving the acoustic signal, and a feature amount extracted from the acoustic characteristic; an attachment trouble rule storage means that stores an attachment trouble rule for detecting an attachment trouble with the apparatus; and an attachment trouble detection means that detects a trouble with an attachment state of the apparatus when the first information satisfies the attachment trouble rule.

Abstract: To easily evaluate the performance of an earphone-type device used for otoacoustic authentication at low cost. A generation unit (31) generates earhole shape data indicating the three-dimensional shape of an individual's ear canal, on the basis of data on the internal structure of an individual's earhole, a center line calculation unit (32) calculates the center line of the ear canal, on the basis of the ear canal shape data, and a dividing unit (33) divides the ear canal into a plurality of layers perpendicular to the center line, and calculates, for each of the divided layers, parameters indicating the shape of the ear canal.

Abstract: The disclosure accurately authenticates a subject, regardless of which audio device is used for the in-ear acoustic authentication. A feature extraction unit (11) applies a test signal to an ear of a subject using an audio device, and upon receiving an acoustic signal from the subject, extracts, from the acoustic signal, a first feature relating to the system consisting of the audio device and the ear of the subject; a correction unit (12) corrects the first feature to a second feature that would result if a prescribed reference device were used instead of the audio device; and an authentication unit (13) authenticates the subject by comparing the second feature with a feature indicated by pre-registered authentication information.

Abstract: [Problem] To evaluate, easily and at low cost, the performance of an earphone device used for ear acoustic certification. [Solution] Holes are provided in a plurality of plate-shaped members (201), an artificial eardrum member (202) corresponds to the eardrum of an individual, and the holes provided in each of the plurality of plate-shaped members (201) are connected, whereby the plurality of plate-shaped members (201) are layered over the artificial eardrum member (202) so as to simulate the external auditory canal of the individual.

Abstract: Provided is to prevent a false determination due to an attachment condition of an apparatus that transmits and receives an acoustic signal, and perform accurate personal authentication. A personal authentication device includes: a personal authentication means that authenticates an individual by using first information at least including an acoustic characteristic calculated from an acoustic signal propagating through the head of the user, which is detected by an apparatus being attached on a head of a user for transmitting and receiving the acoustic signal, and a feature amount extracted from the acoustic characteristic; an attachment trouble rule storage means that stores an attachment trouble rule for detecting an attachment trouble with the apparatus; and an attachment trouble detection means that detects a trouble with an attachment state of the apparatus when the first information satisfies the attachment trouble rule.

Abstract: An audio signal processing device comprises: a determination unit that determines a first voice segment for a target speaker linked to a host device on the basis of an externally acquired first audio signal; a sharing unit that transmits the first audio signal and the first voice segment to another device linked to a non-target speaker and receives a second audio signal and a second voice segment associated with the non-target speaker from the other device; an estimation unit that estimates the voice of the non-target speaker mixed in the first audio signal on the basis of the second audio signal and the second voice segment that are received and an estimation parameter associated with the target speaker that is acquired; and a removal unit that removes the voice of the non-target speaker from the first audio signal.

Abstract: Provided is a personal authentication device capable of simply securing security with little psychological and physical burden of a user to be authenticated. Personal authentication device includes: transmission unit that transmits a first acoustic signal to a user's head; observation unit that observes a second acoustic signal after the first acoustic signal propagation; calculation unit that calculates acoustic characteristics from the first and the second acoustic signal; extraction unit that extracts a feature amount related to a user from the acoustic characteristics; storage control unit that registers the feature amount in the storage unit; identification unit that identifies the user by collating the first feature amount with a second feature amount; and storage unit stores the first feature amount, wherein while identification unit identifies the user as being identical, transmission unit transmits the first acoustic signal every predetermined interval.

Abstract: A search starting point determination unit determines a search starting point in which there is a high presence probability of the target person at a first time based on the person information. A backward tracking unit estimates the presence probabilities of the target person at different locations at a second time before the first time based on the person information and determines an area where the presence probability is higher. A recognition unit calculates a degree of matching between the appearance information and the surveillance images in the area and determines a location at which the degree of matching is higher. A forward tracking unit tracks the candidates of the target person forward in time from the second time based on the person information and the location. A presence probability estimation unit estimates the presence probability of the target person at the first time.

Abstract: The present invention reduces the risk of user biometric information being leaked to a third party. A biometric authentication device (820) receives an echo signal (response signal) from a client device. The echo signal is formed as a result of an inspection signal being applied to an authentication subject by a client device, and the inspection signal being transmitted into the body or to the surface of the body of the authentication subject and changing into the echo signal. The biometric authentication device (820) comprises: an inspection signal generation unit (821) that generates the same inspection signal as the client device; a transmission characteristic calculation unit (823) that calculates, from the inspection signal and the echo signal, a transmission characteristic of the authentication subject; and an authentication unit (824) that authenticates the authentication subject by comparing a preregistered first transmission characteristic and a calculated second transmission characteristic.

Abstract: Provided is an information processing device comprising an acquisition unit configured to acquire acoustic characteristics in a frequency domain based on a sound wave propagating in a head of a user and an extracting unit configured to generate a first frequency response function having a rational polynomial equation to extract feature quantity used for biometric authentication of the user based on the first frequency response function, the rational polynomial equation including terms indicating feature of a peak of the acoustic characteristics in a denominator and terms indicating feature of a notch of the acoustic characteristics in a numerator.

Abstract: The present invention reduces the risk of user biometric information being leaked to a third party. A biometric authentication device (820) receives an echo signal (response signal) from a client device. The echo signal is formed as a result of an inspection signal being applied to an authentication subject by a client device, and the inspection signal being transmitted into the body or to the surface of the body of the authentication subject and changing into the echo signal. The biometric authentication device (820) comprises: an inspection signal generation unit (821) that generates the same inspection signal as the client device; a transmission characteristic calculation unit (823) that calculates, from the inspection signal and the echo signal, a transmission characteristic of the authentication subject; and an authentication unit (824) that authenticates the authentication subject by comparing a preregistered first transmission characteristic and a calculated second transmission characteristic.

Abstract: An attribute estimation apparatus 1 includes: a generation unit 2 configured to generate acoustic characteristic information indicating an acoustic characteristic using a first acoustic signal output to an ear canal and a second acoustic signal produced by the first acoustic signal echoing inside the body; and an estimation unit 3 configured to estimate attributes using the acoustic characteristic information.

Abstract: A state estimation apparatus 1 includes: a generation unit 2 configured to generate acoustic characteristic information indicating an acoustic characteristic using a first acoustic signal output to the ear canal and a second acoustic signal produced by the first acoustic signal echoing inside the body; and an estimation unit 3 configured to estimate the state of the vocal tract and the state of the respiratory tract using the acoustic characteristic information.

Abstract: An emotion estimation apparatus 1 includes: a generation unit 2 configured to generate acoustic characteristic information indicating an acoustic characteristic using a first acoustic signal output to the ear canal and a second acoustic signal produced by the first acoustic signal echoing inside the body; and an estimation unit 3 configured to estimate emotion using the acoustic characteristic information.

Abstract: Provided is a first acoustic information acquisition unit configured to acquire a first acoustic information obtained by receiving a sound wave emitted from a first sound source by a wearable device worn by a user, a second acoustic information acquisition unit configured to acquire a second acoustic information obtained by receiving a sound wave emitted from a second sound source that is different from the first sound source by the wearable device, and a third acoustic information acquisition unit configured to acquire a third acoustic information used for biometric matching of the user based on the first acoustic information and the second acoustic information.

Abstract: Provided is an information processing device including an acoustic information acquisition unit configured to acquire an acoustic information about a resonance in a body of a user wearing a wearable device and a wearing determination unit configured to determine whether or not the user wears the wearable device based on the acoustic information.

Abstract: Provided is an information processing device including: an inspection signal generation unit configured to generate an inspection signal for emitting an inspection sound toward an ear canal of a subject; a first acoustic information acquisition unit configured to acquire a first acoustic information including information about an echo sound of the inspection sound; and a heartbeat information acquisition unit configured to acquire a heartbeat information about a heartbeat of the subject based on the first acoustic information.

Abstract: Provided is an information processing device including a wearing determination unit configured to determine whether or not a user wears a wearable device that emits a sound wave to perform a biometric authentication based on acoustic characteristics toward a part of a head of the user and an operation mode controlling unit configured to switch, based on a result of a determination by the wearing determination unit, an operation mode of the wearable device between a plurality of operation modes including a first operation mode in which a process for the biometric authentication is not executable and a second operation mode in which a process for the biometric authentication is executable.

Abstract: A recognition apparatus 100 for ear acoustic recognition include a feature normalizer 101 which reads input ear acoustic data and removes the earphone's resonance effect from the input ear acoustic data to produce a normalized data at the output, a feature extractor 102 which extracts acoustic features from the normalized data, a classifier 103 which reads the acoustic features as input and classifies them into their corresponding class.