Nec Corporation

Daikin Industries, Ltd.

Daicel Corporation

Yoshitaka Ito

Takayuki Arakawa

Hiroaki Shintani

Satoshi Hara

Masaya Omura

Junko Makino

Yuki Tsukamoto

Fuai Uehara

A method of producing an air filter includes a first step of preparing a tow band and a second step of obtaining a filter medium layer that includes first fibers obtained by applying tension to the tow band to spread the tow band and the first fibers having an average fiber diameter of 5 μm or more and 50 μm or less and second fibers disposed in gaps between the first fibers and having an average fiber diameter of 30 nm or more and 1 μm or less. The second fibers are drawn out from the particulate resin by drawing the particulate resin, and the particulate resin is drawn by separating the first fibers from each other so that a gap is formed between the first fibers during the spreading of the tow band.

Air filter medium and air filter product

To easily evaluate the performance of an earphone-type device used for otoacoustic authentication at low cost. A generation unit () 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 () calculates the center line of the ear canal, on the basis of the ear canal shape data, and a dividing unit () 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.

Device, method, and program for determining parameter indicating shape of ear canal based on layers perpendicular to calculated center line of ear canal

A production method for a fiber article includes: a contact step of, while transferring a plurality of first fibers, bringing a plurality of resin particles formed of high molecules that can be fiberized into contact with the plurality of first fibers; a first processing step of applying an external force to the plurality of first fibers brought into contact with the plurality of resin particles and narrowing gaps between fibers; and a second processing step of, by relieving the external force applied to the plurality of first fibers brought into contact with the plurality of resin particles, forming second fibers from the plurality of resin particles, the second fibers each having an outer diameter that is smaller than each of the first fibers and is set to a value in a range of 30 nm or more to 1.0 μm or less, and forming a fiber composite including the first fibers and the second fibers.

Method for producing fiber articles

[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 (), an artificial eardrum member () corresponds to the eardrum of an individual, and the holes provided in each of the plurality of plate-shaped members () are connected, whereby the plurality of plate-shaped members () are layered over the artificial eardrum member () so as to simulate the external auditory canal of the individual.

Ear model, performance evaluation method, and performance evaluation system

A fiber article includes a plurality of first fibers and a plurality of second fibers each having an outer diameter smaller than that of each of the first fibers, the plurality of second fibers being supported in a dispersed state by the first fibers. A ratio D1/D2 of an outer diameter D1 of the first fiber to an outer diameter D2 of the second fiber is set to a value in a range of 15.0 or greater to 1666.7 or less. The outer diameter D1 is set to a value in a range of 5.0 μm or greater to 50.0 μm or less, and the outer diameter D2 is set to a value in a range of 30.0 nm or greater to 1.0 μm or less.

Fiber article

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.

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Tokyo, Japan

Yoshitaka Ito