Abstract: A loudspeaker system comprises a cabinet (11), a speaker unit (12), a package body (13), a filler gas (15), and an absorbent (14). The speaker unit (12) is mounted in the cabinet (11). At least one package body (13) is disposed in a vacant space (Ra) inside of the cabinet (11) and is structured by a bag body for sealing materials thereinto from outside thereof. A predetermined amount of the filler gas (15) is sealed into the package body (13). A predetermined amount of the absorbent (14) is sealed into the package body (13) and physically absorbs the filler gas (15).

Abstract: A speaker device of the present invention roughly comprises a cabinet (1) and a speaker unit (2a). The speaker unit (2a) is attached to an opening portion formed in a front surface of the cabinet (1). The speaker unit (2a) has a back surface frame (3a), a front surface frame (4a), a first magnetic circuit (5a), a second magnetic circuit (6a), an edge (7a), a damper (8a), a diaphragm (9a), a voice coil bobbin (10a), and a voice coil (11a). A non-magnet member (91a) which is a portion of the diaphragm (9a), the first magnetic circuit (5a), and the second magnetic circuit (6a) play a role as a negative stiffness mechanism to suppress an influence of an acoustic stiffness, thereby achieving a small-size speaker device capable of reproducing low-frequency sound.

Abstract: Disclosed is a light sensitive composition containing a compound A having a group capable of undergoing radical polymerization, a compound B having a group capable of undergoing cationic polymerization, a photopolymerization initiator C, and a polymer binder D, the light sensitive composition being characterized in that the photopolymerization initiator C comprises an iron-arene complex and a halogenated alkyl group-containing compound.

Abstract: Disclosed are a planographic printing plate material and a planographic printing plate preparing process, the planographic printing plate material comprising a support and provided thereon, an image formation layer containing a colorant (a) having an absorption band in a wavelength region of from 700 to 1200 nm, a polymerization initiator (b) and a polymerizable ethylenically unsaturated compound (c), wherein the polymerization initiator (b) is a compound represented by the formula R1—CX2—(C?O)—R2.

Abstract: Disclosed is a light sensitive planographic printing plate material comprising a support and provided thereon, a light sensitive layer containing a polymerization initiator, a polymerizable ethylenically unsaturated compound, a polymeric binder, and a sensitizing dye, wherein the sensitizing dye is represented by formula (1),

Abstract: A speaker unit (11) is attached to an opening section formed on an front surface of a cabinet (10). In an inside of the cabinet (10), fibrous activated carbon (12) (activated carbon fiber) is located. A pressure change in the inside of the cabinet, which changes according to a sound pressure of the speaker unit (11), is suppressed by physical adsorption by the activated carbon (12). Further, since the activated carbon fiber has micro pores, which physically adsorbs a gaseous body, situated on a surface of the fiber, a loss in acoustic energy at the time of physical adsorption is small, and thus it is possible to prevent deterioration in a sound pressure level.

Abstract: A speaker device includes a cabinet (10), a speaker unit (11), a port (12), a cartridge (13), and an adsorbent material (14). The adsorbent material (14) is disposed in the interior of the cartridge (13). The cartridge (13) is a container removable from the cabinet (10). When the adsorbent material (14) is deteriorated, the cartridge (13) is replaced or the adsorbent material (14) is reactivated, thereby making it possible to maintain, over a long period of time, the effect of physical adsorption provided by the adsorbent material (14).

Abstract: An electrodynamic electroacoustic transducer comprises: a first magnetic pole; a second magnetic pole that forms a magnetic gap between itself and the first magnetic pole and is arranged in a space excluding spaces in upper and lower face directions of the first magnetic pole; a yoke; a diaphragm; and a voice coil. The yoke magnetically couples one magnetic pole face of the first magnetic pole with one magnetic pole face of the second magnetic pole so as to support them. The diaphragm is arranged in a space in an upper face direction of the first magnetic pole and in a space in a lower face direction of the second magnetic pole, while its outer periphery is supported by the yoke. The voice coil is arranged in the magnetic gap and adhered to the diaphragm. At least one of the first magnetic pole part and the second magnetic pole part includes a magnet.

Abstract: A loudspeaker unit (2) of a loudspeaker system (1) is fitted to a cabinet (4). An absorbent (3) is disposed in a hollow chamber (R) inside the cabinet (4) and absorbs a gas inside the hollow chamber (R). A phase inverting mechanism (8) inverts the phase by resonating with a sound of a specific frequency radiated from the loudspeaker unit (2) into the hollow chamber (R) and radiates this sound to outside. The watertight means of the phase inverting mechanism (8) prevents invasion of moisture into inside the hollow chamber (R) from outside the cabinet (4) through the phase inverting mechanism (8).

Abstract: A speaker system according to the present invention comprises a cabinet (10), a speaker unit (11), a first parting board (12), a drone cone (13), an adsorption member (14), a second parting board (15), a backboard (16), a variable mechanism (17), and a port (18). A sound pressure generated by the speaker unit (11) causes a pressure variation in a second chamber (R12) via the drone cone (13). The adsorption member (14) with an effect of physical adsorption is operable to suppress the pressure variation. Furthermore, by displacing the diaphragm (171), the variable mechanism (17) is operable to reduce a pressure variation of a direct current component, which is caused by variations in ambient temperature or atmospheric pressure of the speaker system.

Abstract: Disclosed is a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitve layer containing (A) an infrared absorbing dye, (B) a radical generating agent, and (C) a radically polymerizable compound, the light sensitve layer being an outermost layer, wherein the radical generating agent is selected from the group consisting of a sulfonium salt, a iodonium salt and a diazonium salt, and the radically polymerizable compound is a radically polymerizable oxirane compound having an oxirane ring in the molecule.

Abstract: The planographic printing plate material has a support and provided thereon, a photopolymerizable light sensitive layer and a protective layer in that order. The protective layer contains a polyvinyl alcohol derivative A having a saponification degree of 90 to 100 mol % and a solubility of 20 to 200 g per liter of 50° C. water. The viscosity of an aqueous solution containing 4% by weight of the polyvinyl alcohol derivative at 20° C., measured according to JIS K6726, is from 4.5 to 200 mPa·s.

Abstract: Disclosed is a process of preparing a planographic printing plate from a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, an image formation layer containing (A) a polymerization initiator selected from an arene-iron complex and a tribromoacetyl compound, (B) a polymerizable ethylenically unsaturated compound, and (C) an alkali soluble resin with an acid value of 5 to 200, the process comprising the steps of imagewise exposing the light sensitive planographic printing plate material to ultraviolet light using an exposure device comprising a digital mirror device (DMD), and removing an image formation layer at non-exposed portions with an aqueous alkali solution to form an image.

Abstract: Disclosed is a light sensitive composition comprising an addition polymerizable ethylenically unsaturated monomer A), a photopolymerization initiator B), a polymer binder C), and a cation-polymerization compound D), wherein the photopolymerization initiator D) is an iron-arene complex.

Abstract: A photosensitive composition exhibiting enhanced sensitivity is disclosed, comprising an ethylenically unsaturated monomer, a photopolymerization initiator composition and a polymer binder, wherein the photopolymerization initiator composition contains a polyhalogen compound. There is also disclosed a photosensitive lithographic printing plate comprising the foregoing photosensitive composition on a support having a hydrophilic surface.

Abstract: Disclosed is a light sensitive composition containing a compound A having a group capable of undergoing radical polymerization, a compound B having a group capable of undergoing cationic polymerization, a photopolymerization initiator C, and a polymer binder D, the light sensitive composition being characterized in that the photopolymerization initiator C comprises an iron-arene complex and a halogenated alkyl group-containing compound.

Abstract: A photosensitive composition containing: (A) a polymerizable compound containing an ethylenic double bond in the molecule; (B) a photopolymerization initiator; (C) a polymer binder; and (D) a dye exhibiting a maximum absorption wavelength of 350-450 nm, wherein the dye is represented by Formula (1):

Abstract: Disclosed is a process of preparing a planographic printing plate from a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, an image formation layer containing (a) an alkali soluble resin with an acid value of 5 to 200 having an acryloyl group or a methacryloyl group, the alkali soluble resin being obtained by reacting a vinyl copolymer having a monomer unit derived from acrylic acid or methacrylic acid with an epoxy compound having an acryloyl group or a methacryloyl group in the molecule, and (b) a diazo resin, the process comprising the steps of imagewise exposing the light sensitive planographic printing plate material to ultraviolet light using an exposure device comprising a digital mirror device (DMD), and removing an image formation layer at non-exposed portions with an aqueous alkali solution to form an image.

Abstract: A loudspeaker apparatus comprises a housing, an adsorptive material provided inside the housing, for physically adsorbing gas inside the housing, a vibration section including a diaphragm and provided in an opening formed in the housing, a drive section for driving the diaphragm to generate sound from the diaphragm, and a negative stiffness generating mechanism provided inside the housing, for reducing an acoustic stiffness inside the housing, the acoustic stiffness acting on the diaphragm.

Abstract: Disclosed is a planographic printing plate material comprising a support and provided thereon, a photopolymerizable light sensitive layer and a protective layer in the order, wherein the protective layer contains a polyvinyl alcohol derivative A having a saponification degree of 90 to 100 mol % and a solubility of 0.1 to 10 g per liter of 50° C. water, and wherein a viscosity at 20° C. of an aqueous solution containing 4% by weight of the polyvinyl alcohol derivative, measured according to JIS K6726, is from 4.5 to 200 mPa·s.