Abstract: An electrophotographic photosensitive member includes a conductive support and a photosensitive layer disposed on the conductive support. A top surface layer of the electrophotographic photosensitive member includes fluorine-containing resin particles, a fluorine-containing dispersant, and two or more charge transporting materials. When the charge transporting materials are listed in order of decreasing HOMO energy levels, a difference in HOMO energy level between each adjacent two of the charge The ratio A of the amount of each of the charge transporting materials to the total amount of the charge transporting materials satisfies the condition 1 below, [(100/N)?(100/N×0.3)]?A?[(100/N)+(100/N×0.3)]??Condition 1 where N represents the number of types of the charge transporting materials included in the top surface layer.

Abstract: An electrophotographic photosensitive member includes a conductive support and a photosensitive layer disposed on the conductive support. A top surface layer of the electrophotographic photosensitive member includes fluorine-containing resin particles, a fluorine-containing dispersant, and two or more charge transporting materials. When the charge transporting materials are listed in order of decreasing HOMO energy levels, a difference in HOMO energy level between each adjacent two of the charge The ratio A of the amount of each of the charge transporting materials to the total amount of the charge transporting materials satisfies the condition 1 below, [(100/N)?(100/N×0.3)]?A?[(100/N)+(100/N×0.3)]??Condition 1 where N represents the number of types of the charge transporting materials included in the top surface layer.

Abstract: An electrophotographic photoreceptor includes a conductive substrate and a single-layer-type photosensitive layer on the conductive substrate. The single-layer-type photosensitive layer contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The product of a volume resistivity (G?·m) of the single-layer-type photosensitive layer and an elastic modulus (GPa) of the single-layer-type photosensitive layer is about 90 or more.

Abstract: A coating liquid includes a polymer particle, an aggregating agent for a coloring material, a nonionic surfactant having an HLB value within the range of 15.5 to 20, and water.

Abstract: The voice analysis device includes: a voice information acquiring unit that acquires a voice signal generated by plural voice acquiring units disposed at different distances from a speaking section of a speaker and acquiring voice of the speaker; and an identification unit that identifies the speaker corresponding to the voice having been acquired, on the basis of intensities of respective peaks in a frequency spectrum of a first enhanced waveform and a frequency spectrum of a second enhanced waveform. The first enhanced waveform is a waveform where a voice signal of a predetermined target speaker has been enhanced, and the second enhanced waveform is a waveform where a voice signal of a speaker other than the target speaker has been enhanced.

Abstract: A coating liquid includes a polymer particle, an aggregating agent for a coloring material, a nonionic surfactant having an HLB value within the range of 15.5 to 20, and water.

Abstract: There is provided an ink jet recording apparatus equipped with an ink for ink jet recording, and a discharge unit that discharges a liquid droplet of the ink onto a recording medium, wherein the ink contains at least a colorant, a polymer particle, a water-soluble organic solvent, and water, and has a dynamic surface tension after 1 msec of 32 mN/m or less, a dynamic surface tension after 1 sec of less than 30 mN/m, when the dynamic surface tension is measured by a maximum bubble pressure method, and has a variation width in the dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m, a recording speed is from 10 m/min to 50 m/min.

Abstract: There is provided a recording apparatus equipped with an ejection head that ejects an ink to a surface of the undercoat layer of an impermeable recording medium that has, on at least one surface thereof, an undercoat layer containing a polymeric compound selected from the group consisting of polyurethane, polyester, polyvinyl chloride, and polyolefin, wherein the ink contains a coloring agent, a polymer particle, water, and a water-soluble organic solvent and has a static surface tension of less than 30 mN/m and, when examined for dynamic surface tension by a maximum bubble pressure method, has a width of variation in dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m.

Abstract: There is provided an aqueous ink which contains a coloring agent, a polymer particle, water and an aqueous organic solvent, and a surface resistivity of a film obtained by film formation on a glass plate is 1×106 ?/? or less, and a recording method containing: a first discharge step that discharges the first aqueous ink on a front surface of a recording medium; a first drying step that dries the first aqueous ink discharged on the front surface of the recording medium after the first discharge step; and a second discharge step that discharges a second aqueous ink on a rear surface of the recording medium after the first drying step.

Abstract: There is provided an ink comprising a colorant, a polymer particle, water, and a water-soluble organic solvent, wherein the ink has a static surface tension of 30 mN/m or less and, when examined for dynamic surface tension by the maximum bubble pressure method, has a width of variations in dynamic surface tension, for a period from 1 msec after to 1 sec after, of 0.2 mN/m to 3.0 mN/m.

Abstract: The voice analysis device includes: a voice information acquiring unit that acquires a voice signal generated by plural voice acquiring units disposed at different distances from a speaking section of a speaker and acquiring voice of the speaker; and an identification unit that identifies the speaker corresponding to the voice having been acquired, on the basis of intensities of respective peaks in a frequency spectrum of a first enhanced waveform and a frequency spectrum of a second enhanced waveform. The first enhanced waveform is a waveform where a voice signal of a predetermined target speaker has been enhanced, and the second enhanced waveform is a waveform where a voice signal of a speaker other than the target speaker has been enhanced.

Abstract: There is provided an aqueous ink which contains a coloring agent, a polymer particle, water and an aqueous organic solvent, and a surface resistivity of a film obtained by film formation on a glass plate is 1×106?/? or less, and a recording method containing: a first discharge step that discharges the first aqueous ink on a front surface of a recording medium; a first drying step that dries the first aqueous ink discharged on the front surface of the recording medium after the first discharge step; and a second discharge step that discharges a second aqueous ink on a rear surface of the recording medium after the first drying step.

Abstract: A voice analyzer includes a voice information acquiring unit that acquires information about voices acquired by a first voice acquiring unit which acquires the voice and is worn by a first wearer and a second voice acquiring unit which acquires the voice and is worn by a second wearer from each of the wearers, and a distance calculation unit that calculates a distance between the first wearer and the second wearer on the basis of (a) speaker identification information, which is information for determining whether the voice acquired by the first voice acquiring unit and the voice which is the same as that acquired by the first voice acquiring unit and is acquired by the second voice acquiring unit are spoken by the wearers or other persons, and (b) a phase difference between sound waves with plural frequencies included in the voices.

Abstract: There is provided an ink jet recording apparatus equipped with an ink for ink jet recording, and a discharge unit that discharges a liquid droplet of the ink onto a recording medium, wherein the ink contains at least a colorant, a polymer particle, a water-soluble organic solvent, and water, and has a dynamic surface tension after 1 msec of 32 mN/m or less, a dynamic surface tension after 1 sec of less than 30 mN/m, when the dynamic surface tension is measured by a maximum bubble pressure method, and has a variation width in the dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m, a recording speed is from 10 m/min to 50 m/min.

Abstract: There is provided a recording apparatus equipped with an ejection head that ejects an ink to a surface of the undercoat layer of an impermeable recording medium that has, on at least one surface thereof, an undercoat layer containing a polymeric compound selected from the group consisting of polyurethane, polyester, polyvinyl chloride, and polyolefin, wherein the ink contains a coloring agent, a polymer particle, water, and a water-soluble organic solvent and has a static surface tension of less than 30 mN/m and, when examined for dynamic surface tension by a maximum bubble pressure method, has a width of variation in dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m.

Abstract: A voice analyzer includes a first voice acquisition unit provided in a place where a distance of a sound wave propagation path from a mouth of a user is a first distance, plural second voice acquisition units provided in places where distances of sound wave propagation paths from the mouth of the user are smaller than the first distance, and an identification unit that identifies whether the voices acquired by the first and second voice acquisition units are voices of the user or voices of others excluding the user on the basis of a result of comparison between first sound pressure of a voice signal of the voice acquired by the first voice acquisition unit and second sound pressure calculated from sound pressure of a voice signal of the voice acquired by each of the plural second voice acquisition units.

Abstract: A sound analysis apparatus includes a sound information obtaining section chat obtains information relating to a sound acquired by a sound acquiring section that acquires the sound and distinguishes a spoken voice of a wearer from a spoken voice of another person, a phase difference deriving section that derives a relationship between a frequency and a phase difference with respect to the sound acquired by the plural sound acquiring sections, a dispersion deriving section that derives a dispersion that is the level of irregularity of the derived phase difference, and a distance deriving section that derives a distance between the wearer and the other person using a first dispersion derived in a case where the sound is distinguished as the spoken voice of the other person and a second dispersion derived in a case where the sound is distinguished as the spoken voice of the wearer.

Abstract: A voice analyzer includes an apparatus body, a strap that is connected to the apparatus body and is used to hang the apparatus body from a neck of a user, a first voice acquisition unit provided in the strap or the apparatus body, a second voice acquisition unit provided at a position where a distance of a sound wave propagation path from a mouth of the user is smaller than a distance of a sound wave propagation path from the mouth of the user to the first voice acquisition unit, and an identification unit that identifies a sound, in which first sound pressure acquired by the first voice acquisition unit is larger by a predetermined value or more than second sound pressure acquired by the second voice acquisition unit, on the basis of a result of comparison between the first sound pressure and the second sound pressure.

Abstract: There is provided an ink comprising a colorant, a polymer particle, water, and a water-soluble organic solvent, wherein the ink has a static surface tension of 30 mN/m or less and, when examined for dynamic surface tension by the maximum bubble pressure method, has a width of variations in dynamic surface tension, for a period from 1 msec after to 1 sec after, of 0.2 mN/m to 3.0 mN/m.

Abstract: A voice analyzer includes a plate-shaped body, a plurality of first voice acquisition units that are placed on both surfaces of the plate-shaped body and that acquire a voice of a speaker, a sound pressure comparison unit that compares sound pressure of a voice acquired by the first voice acquisition unit placed on one surface of the plate-shaped body with sound pressure of a voice acquired by the first voice acquisition unit placed on the other surface and determines a larger sound pressure, and a voice signal selection unit that selects information regarding a voice signal which is associated with the larger sound pressure and is determined by the sound pressure comparison unit.