Abstract: For an easy calibration using calibration particles, provided is a measuring device to capture images of target objects. An image analyzer acquires multiple images obtained at a predetermined time interval, (a) specifies the mean-square displacement of a bright point of a calibration particle based on the displacement of the bright point of the calibration particle in the multiple images in a calibration mode, and (b) specifies the mean-square displacement of a bright point of the target particle based on the displacement of the bright point of the target particle in the multiple images in a measurement mode. A particle size analyzer (c) derives the particle size of the target particle from the mean-square displacement of the bright point of the target particle based on the mean-square displacement of the bright point of the calibration particle and the particle size of the calibration particle in an analysis mode.

Abstract: A microbial particle measuring apparatus includes: a light emitter configured to irradiate a fluid with light of a predetermined wavelength over a predetermined measurement time; a fluorescence receiver configured to selectively receive fluorescence emitted from particles contained in the fluid and output a signal having a magnitude corresponding to intensity of the fluorescence; a signal acquisition unit configured to obtain the signal output from the fluorescence receiver at regular intervals over the measurement time; and a determiner configured to calculate a slope of waveform of the signal obtained by the signal acquisition unit, and determine a concentration of microbial particles contained in the fluid using an attenuation amount of fluorescence intensity generated in a time period in which the slope in the measurement time is smaller than a predetermined value as an amount of attenuation derived from the microbial particles.

Abstract: A flow cell includes a body and a flow channel. The body is formed out of blocks made of an uniaxial crystal material and joined to one another. The flow channel is formed inside the body, so that the flow cell is configured to be used to measure particles passing through the flow channel based on reception of scattered light generated from the particles. A crystallographic c-axis in a predetermined part of the body is configured to being substantially perpendicular to both a receiving direction and a polarization direction of the scattered light.

Abstract: A particle counter includes: a multi-flow cell with flow passages arrayed in a first direction and having a section including a detection region, for detecting a particle, formed when the flow passage is irradiated with irradiation light; a light receiving optical system configured to receive emitted light generated from a particle contained in sample fluid flowing in the at least one flow passage and passing through the detection region; an optical axis moving unit configured to move an optical axis of the irradiation light and an optical axis of the emitted light in the first direction; and a counter configured to count the particle for each particle size based on an intensity of the emitted light.

Abstract: A hearing device includes: an earphone that is adapted to be worn in a concha auriculae or an external auditory canal of an ear; and a cord that is adapted to extend so as to pass through an upper portion of a root of the ear from a back side of an auricle of the ear when the earphone is worn, and that is connected to the earphone, the cord that is adapted to abut against a cymba conchae of the ear when the earphone is worn.

Abstract: A particle counting system includes a particle counting means and pre-stage irradiation means. The particle counting means counts particles existing in a fluid by irradiating the fluid containing target particles with light at a predetermined wavelength, separating selectively autofluorescence or phosphorescence emitted from the target particles by the radiated light, receiving the separated autofluorescence or phosphorescence, and determining that the target particles are the particles according to the received autofluorescence or phosphorescence. The pre-stage irradiation means irradiates the fluid with ultraviolet light in advance before the particle counting means irradiates the fluid with the light at the predetermined wavelength. The particle counting means includes a band-pass filter that allows light having a wavelength of 450 nm to 600 nm to pass therethrough.

Abstract: An electroacoustic transducer includes an electromechanical transducer and a casing. The electromechanical transducer transduces an electric signal into mechanical vibration. The housing can be attached to a cavum conchae without blocking an external auditory canal, in which the electromechanical transducer is housed, and vibrates due to the mechanical vibration caused by the electromechanical transducer to generate sound. The housing includes an inner housing portion located on the external auditory canal side and an outer housing portion located on an external environment side when the housing is attached to the cavum conchae. The housing has an ellipsoidal shape or an oval shape.

Abstract: The electromechanical transducer is provided with: a structure portion in which a magnet, yokes, and a coil are integrally arranged; an armature which includes an inner portion penetrating through an internal space of the structure portion along a central axis in the X-direction, and outer portions, constitutes a magnetic circuit with the structure portion, and is displaced in the Z-direction; and elastic members providing the armature with a recovery force. Each of the elastic members has a first and a second engaging portions. A width in which a force in the Z-direction acts between each of the elastic members and the structure portion via the first engaging portion has a first distance. A width between each of the elastic members and the outer portion via the second engaging portion has a second distance in the Y-direction, wherein the dimension condition of 2a>2×2b is set.

Abstract: A microbial particle is accurately counted in distinction from a non-microbial particle. A preceding-stage irradiation section 2 irradiates a sample as fluid with ultraviolet light at a preceding stage of a microbial particle counter 1. The ultraviolet light is ultraviolet light having a deep ultraviolet region, the ultraviolet light increasing the fluorescence intensity of a first autofluorescence substance in the microbial particle. The microbial particle counter 1 measures light intensity in a first wavelength range including the fluorescence wavelength of the first autofluorescence substance. In addition, the microbial particle counter 1 measures light intensity in a specific second wavelength range. Further, the microbial particle counter 1 counts the microbial particle in distinction from a non-microbial particle in the fluid based on the measured light intensity in the first wavelength range and the measured light intensity in the specific second wavelength range.

Abstract: According to one embodiment, a particle measuring method is disclosed. The method includes irradiating a detection liquid with light. The detection liquid contains methyl salicylate. The method further includes converting scattered light from the detection liquid into an electric signal by using photoelectric conversion after irradiating the detection liquid with the light. The method further includes performing a particle measurement on the detection liquid by using the electric signal.

Abstract: An installation structure of a vibrator includes elastic members formed of an elastic material, the elastic members being arranged between a housing of a listening device, and the vibrator accommodating an electromechanical transducer for transducing an electric signal into mechanical vibration. The vibrator is installed on the listening device such that a lower surface of the vibrator is disposed at a position facing an ear cartilage in a state where the listening device is worn on an ear, and a first mechanical impedance of the elastic members between the vibrator and the housing is set smaller, at a frequency of 200 Hz to 1000 Hz, than twice a second mechanical impedance, with which the vibrator is loaded, of the ear cartilage.

Abstract: The present disclosure relates to an apparatus for manufacturing a nerve conduit, more particularly to an apparatus for manufacturing a porous nerve conduit using glass fibers whereby microchannels are formed using the space between the glass fibers and the defective rate and location-dependent variation of each nerve conduit can be minimized through uniform decompression during the manufacture. The nerve conduit manufactured according to the present disclosure can be manufactured to have various diameters and lengths to be applicable to in vitro and in vivo researches on nerves.

Abstract: An in-fluid floating substance measurement flow cell includes: a main body having at least a predetermined portion made of a material having translucency; and a flow passage formed inside the main body, having both end openings at an outer surface of the main body in a substantially identical direction, and configured such that fluid flows in the flow passage. The flow passage has a predetermined section arranged between two opposing flat wall surfaces facing each other, and the predetermined portion includes the predetermined section.

Abstract: An audiometer is provided which has: a main body section; and multiple sets of a headphone section and a response operation section, wherein the main body section performs wireless communication with the headphone section and performs wireless communication with the response operation section independently of the wireless communication with the headphone section, thereby supplying a test sound output command to the headphone section to cause the headphone section to output the test sound and receiving information on operation by a subject from the response operation section, and performs the wireless communication with the headphone section and the response operation section of each set by a time-division multiplexing system.

Abstract: A three-dimensional shape data production method and a system for the same for realizing contactless receiving of data regarding the inner shape of a tubular body which includes a step of generating multiple pieces of two-dimensional image data based on a signal from an image capturing device configured to be movable inside a tubular body and configured to capture an image of the inside of the tubular body; a step of receiving space information on the image capturing device upon image capturing by the image capturing device based on a signal from a motion sensor placed at the image capturing device; and a step of associating the two-dimensional image data and the space information with each other and generating three-dimensional shape data of the inside of the tubular body based on the two-dimensional image data and the space information.

Abstract: A system identification device for performing fast real-time identification for a system from input/output data includes a filter robust to disturbance, by setting the maximum energy gain from the disturbance to a filter error, as an evaluation criterion, smaller than a given upper limit. The filter estimates a state estimation value of a state of the system.

Abstract: Provided is a particle measuring device and a particle measuring method for measuring a particle size with favorable accuracy. A flow cell (1) includes a flow passage (1a) of sample fluid. An irradiation optical system (3) irradiates, with light from a light source (2), the sample fluid in the flow passage (1a). An imaging unit (4) captures, from an extension direction of the flow passage (1a), an image of scattered light from the particle in a detection region in the flow passage (1a), the light passing through the detection region. A particle size specifying unit specifies a movement amount of the particle in a two-dimensional direction by Brownian motion based on multiple still images of a particle image captured at a predetermined frame rate by the imaging unit (4), thereby specifying the particle size of the particle from the movement amount in the two-dimensional direction.

Abstract: According to one embodiment, a particle measuring method is disclosed. The method includes irradiating a detection liquid with light. The detection liquid contains methyl salicylate. The method further includes converting scattered light from the detection liquid into an electric signal by using photoelectric conversion after irradiating the detection liquid with the light. The method further includes performing a particle measurement on the detection liquid by using the electric signal.

Abstract: A particle counter includes a detector that receives, using a light receiving element, interference light between scattered light and reference light, generates a detection signal corresponding to the interference light, and amplifies the detection signal using an amplifier; a counting unit that performs counting of the particle, based on the detection signal in a measurement period for measuring particle; and an optical path length variable unit that causes the optical path length of at least one of a first optical path and a second optical path to be changed at a predetermined rate, wherein the predetermined rate is set based on a flow velocity of the fluid so as to slow a change in a phase difference between the scattered light and the reference light and to make the frequency of the detection signal lower by changing the optical path length.

Abstract: A hearing aid provided which has: a battery; a control means which controls a function of the hearing aid, including a wireless communication; a power supply switch which switches between supply and block of power from the battery to the control means; and a magnetic switch connected to the control means, wherein: the control means proceed to a normal operation via a start-up process when power is supplied from the battery due to the power supply switch; and if the magnetic switch is on during the start-up process, the control means switches a wireless communication setting before proceeding to the normal operation.