摘要:
A noise control device which produces behind it an enlarged sound reducing region is disclosed. The device comprises a hollow structural body composed of a plurality of elongate hollow passages which are different in length and constructed such that the passage length is made the longest at a substantially center part in a vertical direction and is made gradually shorter from the center part toward upper and lower edges of the hollow structural body. The upper and lower edges allow direct propagation sound emitted from a noise source to pass thereover and therethrough.
摘要:
A device for controlling a propagation direction of noise, which is preferably associated with a sound insulating wall to significantly improve its sound reducing effect of alleviating noise emitted from a noise source such as a railroad, highway and the like on which an electric car and automobiles run. The device comprises a hollow structural body composed of a plurality of elongated vertical hollow passages arranged at right angles to a substrate and spaced apart from each other by means of partition walls. The upper noise inlet side surface of the hollow passages face a propagation direction of noise emitted from the noise source and serve to refract and lag in phase the noise passed therethrough, thereby producing a sound reducing region located intermediate between a direct sound propagation and the refracted sound propagation. In one embodiment, a pair of hollow structural bodies are arranged in opposition to each other to form an arch type device. In another embodiment, the hollow structural body may be provided at its noise inlet or outlet side surface with an extension of the hollow passages.
摘要:
A device for controlling a propagation direction of noise which is preferably associated with a sound insulating wall to significantly improve its sound reducing effect of alleviating noise emitted from a noise source such as a railroad, highway and the like on which an electric car and automobiles run. The device comprises a hollow structural body composed of a plurality of elongate hollow passages superimposed one upon the other and spaced apart from each other. The passages are arranged in a propagation direction of noise emitted from the noise source and serve to refract and lag in phase the noise passed therethrough, thereby producing a sound reducing region located intermediate between a direct propagation sound and the refraction propagation sound.
摘要:
A perlite sound absorbing plate and a sound insulating wall constructed by arranging a number of said plates side by side and by assembling together into one integral body are disclosed. The plate is composed of a mixture including 1,000 cm.sup.3 by bulk volume of formed perlite particles each having a diameter of 0.1 to 7.0 mm, 100 to 140 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by press molding with a compression ratio of 1.10 to 1.30. The wall is constructed by assembling a number of said plates each provided with a side groove with the aid of supporting columns and reinforcing plates, each having a ridge adapted to be engaged with the side groove of said plate.
摘要:
A sound absorbing body which can effectively be utilized as an exterior sound absorbing wall or an interior wall of a house is disclosed. The sound absorbing body comprises a number of sound absorbing cavities inclined at an angle .alpha. which is smaller than 80.degree. with respect to a transverse horizontal sectional plane of the body, the sound absorbing cavities being opened at the sound incident surface.
摘要:
A noise control apparatus for reducing a sound volume of a noise propagating from a noise source such as a railroad includes a sound arresting wall placed apart from the noise source. Means for shifting in phase and refracting the acoustic wave of the noise is disposed at substantially the top of the noise arresting wall. The above means, for example, has a plurality of passageways extending substantially along the propagating direction of the acoustic wave of the noise and the length of the passageways varies. Through the above means, a part of the acoustic wave from the noise source is refracted and the phase thereof is shifted to be a refracted propagating sound, which thereafter interferes with the other part of the acoustic wave directly from the noise source to thereby reduce a sound volume to a great extent.
摘要:
Provided are a method of manufacturing liquid crystal display device possessing transparent conductive layer exhibiting excellent optical transparency, resistance characteristic, evenness, adhesion to substrate, and hardness, and liquid crystal display device thereof. The liquid crystal display device possessing liquid crystal display panel and backlight unit, wherein liquid crystal display panel has a structure in which display electrode and reference electrode are provided on surface of region corresponding to unit pixel on liquid crystal layer side of one transparent substrate or each of both transparent substrates provided facing to each other via liquid crystal layer, and light transmitting liquid crystal layer is modulated by electric field generated parallel to transparent substrate between reference electrode and display electrode, wherein the method of manufacturing liquid crystal display device possesses the step of forming transparent conductive layer in pixel region by atmospheric pressure plasma method employing nitrogen gas as thin film forming gas.
摘要:
The present invention provides a functional filler which is excellent in dispersibility or interaction with polylactic acid as a matrix polymer and can improve heat resistance, moldability and mechanical strength of the polylactic acid; and a resin composition containing the functional filler. The functional filler of the present invention is characterized in including a raw material filler and polylactic acid, wherein a surface or end the raw material filler is modified by the polylactic acid.
摘要:
A layer forming method is disclosed which comprises the steps of supplying power of not less than 1 W/cm2 at a high frequency voltage exceeding 100 kHz across a gap between a first electrode and a second electrode opposed to each other at atmospheric pressure or at approximately atmospheric pressure to induce a discharge, generating a reactive gas in a plasma state by the charge, and exposing a substrate to the reactive gas in a plasma state to form a layer on the substrate.
摘要翻译:公开了一种层形成方法,其包括以下步骤:在超过100kHz的高频电压下跨越第一电极和第二电极相对的间隙提供不小于1W / cm 2的功率 彼此在大气压或大气压下引起放电,通过电荷产生处于等离子体状态的反应性气体,并将衬底暴露于等离子体状态的反应气体,以在衬底上形成一层。
摘要:
The object of the present invention is to provide:a glass member characterized by excellent friction resistance property, and antifouling property;a reading glass wherein, when this glass member is used as the reading glass of a scanner or a copier, toner, dust or adhesive does not easily deposit on the reading glass, with the result that deterioration in the copied image quality such as black spots or black streaks can be avoided;and a scanner or a copier wherein the glass is used.The glass member including a glass substrate including a fluorine containing film coated directly, not through any other layer interposed, on at least one surface of the glass substrate, wherein an element composition of the fluorine containing film is characterized in that a content of fluorine atoms exceeds 30 atomic percent, and an atomic ratio of oxygen atom to fluorine atom (O/F) is between 0.2 and 1.0.