摘要:
A sound absorbing structure according to the present invention comprises: a housing having a front face, and a side face which is provided perpendicularly around at least a part of an edge portion of the front face; a gas adsorption material for physically adsorbing gas in an interior space delimited by the front face and the side face of the housing, which gas adsorption material is placed in the interior space; sealing means for sealing the gas adsorption material from outside thereof; and an acoustic connection section for functioning as an acoustic mass so as to acoustically connect an exterior space and the interior space of the housing, which acoustic connection section is provided in at least one of the front face and the side face. The sound absorbing structure according to the present invention realizes both sound absorption in a low-pitched range and a reduction in the size of the structure.
摘要:
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).
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A speaker 10 includes: a plurality of piezoelectric diaphragms 11 and 12 each including a substrate and a piezoelectric element provided on at least one surface of the substrate; one or a plurality of connecting members 13 connecting the plurality of piezoelectric diaphragms 11 and 12 to each other such that the plurality of piezoelectric diaphragms 11 and 12 aligned from the piezoelectric diaphragm 11 located at a frontmost side of the speaker 10, in a thickness direction of the piezoelectric diaphragm 11, and the piezoelectric diaphragms 11 and 12 adjacent to each other face each other at an interval; a support member 16 supporting the back-side diaphragm 12 that is a piezoelectric diaphragm at a backmost side of the speaker 10. The plurality of piezoelectric diaphragms 11 and 12 include two piezoelectric diaphragms 11 and 12 having stiffnesses different from each other.
摘要:
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):
摘要:
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 polymerization initiator is a biimidazole compound, and the sensitizing dye is represented by formula (1),
摘要:
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.
摘要:
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.