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1. 发明授权

US6119521A Apparatus and method for measuring the acoustic properties of acoustic absorbers 失效
标题翻译：用于测量吸声器的声学特性的装置和方法
公开(公告)号：US6119521A
公开(公告)日：2000-09-19
申请号：US62906
申请日：1998-04-20
申请人： Belur Shivashankara , Fredrick M. Hutto , Noe Arcas , Charles A. Parente , Ronald F. Olsen
发明人： Belur Shivashankara , Fredrick M. Hutto , Noe Arcas , Charles A. Parente , Ronald F. Olsen
IPC分类号： G01N29/11 , G01N29/04
CPC分类号： G01N29/11 , G01N2291/105 , G01N2291/2694
摘要： A device for measuring the acoustic absorption properties of materials such as liners for jet engines has a first housing, an acoustic driver configured to provide acoustic energy to the first housing, a second housing attached to the first housing, and an acoustic driver configured to provide acoustic energy to the second housing. Acoustic sensors are used to measure the acoustic energy emitted from the two housings and to measure the absorption of each of the housings.
摘要翻译：用于测量诸如喷气发动机的衬垫的材料的吸声性能的装置具有第一壳体，被配置为向第一壳体提供声能的声学驱动器，连接到第一壳体的第二壳体和配置成提供声能到第二壳体。声学传感器用于测量从两个壳体发出的声能并测量每个壳体的吸收。

2. 发明授权

US5684251A Portable acoustic impedance data acquisition and analysis system 失效
标题翻译：便携式声阻抗数据采集与分析系统
公开(公告)号：US5684251A
公开(公告)日：1997-11-04
申请号：US412387
申请日：1995-03-28
申请人： Noe Arcas , Charles A. Parente , Shepard G. Kay
发明人： Noe Arcas , Charles A. Parente , Shepard G. Kay
IPC分类号： G01N29/00 , G01N29/09 , G01N29/04
CPC分类号： G01N29/09 , G01N2291/02491 , G01N2291/02836 , G01N2291/02863 , G01N2291/02872 , G01N2291/2694
摘要： A portable two microphone acoustic impedance data acquisition and analysis system provided in a lightweight, fully portable, battery powered instrument with a dual capability of either on-site or remote-site analysis of measured data on the acoustic impedance of acoustically absorbing duct liners of aircraft jet engines. The fully portable instrument is capable of being operated by relatively unskilled personnel to provide acoustic impedance and non-linearity measurements on acoustic liners at airports and aircraft maintenance facilities. The measured data on the engine duct acoustic liner can be an input directly to the data analysis system at the data acquisition site for on-site analysis, or can be recorded for input to a data analysis system at a later time, or can be recorded and transmitted, such as by a telephone modem, to a data analysis system at a remote-site. The remote-site analysis of data eliminates the requirement for skilled personnel at the aircraft to perform the relatively complex data analysis procedures.
摘要翻译：便携式双麦克风声阻抗数据采集和分析系统，提供在轻型，完全便携式，电池供电的仪器中，具有双重功能，可对现场或远程现场分析航空器吸声管道衬垫的声阻抗测量数据喷气发动机。完全便携式仪器能够由相对不熟练的人员操作，以在机场和飞机维修设施的声学衬垫上提供声学阻抗和非线性测量。发动机管道声衬垫上的测量数据可以直接输入到数据采集现场分析系统的数据分析系统进行现场分析，也可以在以后记录下来输入数据分析系统，或者可以记录并且例如通过电话调制解调器发送到远程站点处的数据分析系统。数据的远程现场分析消除了对飞行员熟练人员执行相对复杂的数据分析程序的要求。

3. 发明授权

US5014815A Acoustic liner 失效
标题翻译：声衬
公开(公告)号：US5014815A
公开(公告)日：1991-05-14
申请号：US371398
申请日：1989-06-26
申请人： Noe Arcas , Charles A. Parente
发明人： Noe Arcas , Charles A. Parente
IPC分类号： B64C1/40 , F02K1/82 , G10K11/172
CPC分类号： G10K11/172 , F02K1/827 , B64D2033/0286 , Y02T50/672
摘要： An acoustic liner comprising a sound permeable inside plate forming a first closed annulus, and a sound impermeable outside plate forming a second closed annulus located outside of and extending around the first closed annulus. The inside and outside plates are spaced apart and thus form an annular chamber therebetween; and a core member is secured in this annular chamber, between the inside and outside plates. The core member forms or has the shape of a sine wave form annularly extending around the inside plate, and the core member and the inside plate from a multitude of varying depth sound absorption chambers to attenuate sound waves over a broad band of frequencies.
摘要翻译：包括形成第一闭环的透声内板的声学衬垫和形成位于第一闭环之外并围绕第一闭环的第二闭环的不透声外板。内板和外板间隔开，从而在它们之间形成环形室; 并且芯构件固定在该环形室中，内外板之间。芯构件形成或具有围绕内板环形延伸的正弦波形状，以及来自多个变化深度吸声室的芯构件和内板，以在宽频带上衰减声波。

4. 发明授权

US4969535A Acoustic liner 失效
标题翻译：声衬
公开(公告)号：US4969535A
公开(公告)日：1990-11-13
申请号：US371593
申请日：1989-06-26
申请人： Noe Arcas , Charles A. Parente
发明人： Noe Arcas , Charles A. Parente
IPC分类号： B64C1/40 , B64D33/02
CPC分类号： B64D33/02 , B64D2033/0206 , B64D2033/0286
摘要： An acoustic liner comprising a sound permeable inside plate forming a first closed annulus, and a sound impermeable outside plate forming a second closed annulus located outside of and extending around the first closed annulus. The inside and outside plates are spaced apart and thus form an annular chamber therebetween; and a core member is secured in this annular chamber, between the inside and outside plates. The core member forms or has the shape of a sine wave form annularly extending around the inside plate, and the core member and the inside plate form a multitude of varying depth sound absorption chambers to attenuate sound waves over a broad band of frequencies.
摘要翻译：包括形成第一闭环的透声内板的声学衬垫和形成位于第一闭环之外并围绕第一闭环的第二闭环的不透声外板。内板和外板间隔开，从而在它们之间形成环形室; 并且芯构件固定在该环形室中，内外板之间。芯构件形成或具有围绕内板环形延伸的正弦波形状，并且芯构件和内板形成多个变化的深度吸声室，以在宽频带上衰减声波。

5. 发明授权

US5919029A Noise absorption system having active acoustic liner 失效
标题翻译：具有主动声学衬垫的噪声吸收系统
公开(公告)号：US5919029A
公开(公告)日：1999-07-06
申请号：US751544
申请日：1996-11-15
申请人： William C. Van Nostrand , Charles A. Parente , Noe Arcas
发明人： William C. Van Nostrand , Charles A. Parente , Noe Arcas
IPC分类号： G10K11/178 , F01D25/04
CPC分类号： G10K11/1788 , F05B2260/962 , G10K2210/103 , G10K2210/107 , G10K2210/1281 , G10K2210/3025 , G10K2210/3216 , G10K2210/3224 , G10K2210/32291
摘要： The present invention is embodied in an aircraft engine noise absorption system having a resonator cavity for absorbing incident noise except for a residue noise signal having a predominant frequency, the system comprising an actuator providing an actuator acoustic signal, a noise sensor for sensing the predominant frequency, and a controller for setting the actuator acoustic signal to the predominant frequency and varying one of a phase and an amplitude of the actuator acoustic signal to decrease the residue noise signal.
摘要翻译：本发明体现在具有用于吸收入射噪声的谐振腔的飞机发动机噪声吸收系统，除了具有主要频率的残留噪声信号，该系统包括提供致动器声信号的致动器，用于感测主要频率的噪声传感器以及用于将致动器声信号设置为主频并且改变致动器声信号的相位和幅度中的一个以减小残余噪声信号的控制器。

6. 发明授权

US5175401A Segmented resistance acoustic attenuating liner 失效
标题翻译： SEGMENTED RESISTANCE ACOUSTIC ATTENUATING LINER
公开(公告)号：US5175401A
公开(公告)日：1992-12-29
申请号：US670917
申请日：1991-03-18
申请人： Noe Arcas , Charles A. Parente
发明人： Noe Arcas , Charles A. Parente
IPC分类号： G10K11/172
CPC分类号： G10K11/172 , Y10T428/24149
摘要： An acoustic attenuating liner has a non-metallic honeycomb core bonded on a backsheet. A corrosion-insulated perforated sheet is bonded to the honeycomb core by adhesive between the perforated sheet and the core. The mesh is woven to a plurality of different determined weave patterns from material on and affixed to the perforated sheet, whereby the mesh has a plurality of different resistances. The mesh is aligned with the perforated sheet and is bonded to the perforated sheet by additional adhesive between the mesh and the perforated sheet, thereby providing a segmented liner with a plurality of facesheet resistances.
摘要翻译：声衰减衬垫具有粘合在底片上的非金属蜂窝芯。通过多孔板和芯之间的粘合剂将防腐绝缘的多孔板粘合到蜂窝芯上。网格由多个不同的确定的编织图案编织到多孔板上并固定到多孔板上，由此网格具有多个不同的电阻。网孔与穿孔片材对准，并通过网孔和穿孔片材之间的附加粘合剂粘合到穿孔片材上，从而提供具有多个面片电阻的分段衬垫。

7. 发明授权

US5377546A Multi-degree linear liner impedance testing device 失效
标题翻译：多级线性线性阻抗测试装置
公开(公告)号：US5377546A
公开(公告)日：1995-01-03
申请号：US827606
申请日：1992-01-29
申请人： Noe Arcas , Shepard G. Kay , Charles A. Parente
发明人： Noe Arcas , Shepard G. Kay , Charles A. Parente
IPC分类号： G01H15/00 , G01N29/11 , G01N29/22 , G01N29/00
CPC分类号： G01H15/00 , G01N29/11 , G01N29/223 , G01N2291/02441 , G01N2291/045
摘要： A device for permitting evaluation of the acoustic impedance of liner designs used to attenuate noise in engine aircraft inlet and exhaust ducts, and in particular multiple degree of freedom designs of the type which include a porous facesheet followed by a backing depth followed by successive facesheet/backing depth combinations, includes a plurality of spacers of different thicknesses for varying the backing depths, and a movable plunger with a threaded adjustment mechanism for establishing the final backing depth. Gaskets and seals are installed at various interfaces to eliminate noise leakage paths. Two attachment bolts are used to hold the plunger assembly, face sheets, and spacers together, and an alignment disc positioned on the first facesheet is used to properly align an impedance tube waveguide on facesheet.
摘要翻译：一种用于允许评估用于衰减发动机飞机入口和排气管道中的噪声的衬套设计的声阻抗的装置，并且特别是包括多孔面板，随后是背衬深度，随后是连续的面板/ 背衬深度组合包括多个用于改变背衬深度的不同厚度的间隔物，以及具有用于建立最终背衬深度的螺纹调节机构的可移动柱塞。垫圈和密封件安装在各种接口处，以消除噪声泄漏路径。使用两个连接螺栓来将柱塞组件，面板和间隔件保持在一起，并且使用位于第一面板上的对准盘来将阻抗管波导适当地对准在面板上。

8. 发明授权

US5025888A Acoustic liner 失效
标题翻译：声衬
公开(公告)号：US5025888A
公开(公告)日：1991-06-25
申请号：US371399
申请日：1989-06-26
申请人： Noe Arcas , Charles A. Parente
发明人： Noe Arcas , Charles A. Parente
IPC分类号： B64C1/40 , F02K1/82 , G10K11/172
CPC分类号： G10K11/172 , F02K1/827 , B64D2033/0286 , Y02T50/672
摘要： An acoustic liner comprising a sound permeable inside plate forming a first closed annulus, and a sound impermeable outside plate forming a second closed annulus located outside of and extending around the first closed annulus. The inside and outside plates are spaced apart and thus form an annular chamber therebetween; and a core member is secured in this annular chamber, between the inside and outside plates. The core member forms or has the shape of a sine wave form annularly extending around the inside plate, and the core member and the inside plate form a multitude of varying depth sound absorption chambers to attenuate sound waves over a broad band of frequencies.
摘要翻译：包括形成第一闭环的透声内板的声学衬垫和形成位于第一闭环之外并围绕第一闭环的第二闭环的不透声外板。内板和外板间隔开，从而在它们之间形成环形室; 并且芯构件固定在该环形室中，内外板之间。芯构件形成或具有围绕内板环形延伸的正弦波形状，并且芯构件和内板形成多个变化的深度吸声室，以在宽频带上衰减声波。

9. 发明授权

US4768379A Method and apparatus for determining flow resistance of fully assembled acoustic liners 失效
标题翻译：用于确定完全组装的声学衬垫的流动阻力的方法和装置
公开(公告)号：US4768379A
公开(公告)日：1988-09-06
申请号：US890999
申请日：1986-07-25
申请人： Noe Arcas , Joseph P. Gow , Charles A. Parente
发明人： Noe Arcas , Joseph P. Gow , Charles A. Parente
IPC分类号： G01N29/00 , G01H15/00 , G01N29/11 , G01N29/22 , G01N29/04
CPC分类号： G01N29/11 , G01H15/00 , G01N29/223 , G01N2291/02863 , G01N2291/02872
摘要： Apparatus and method for determining the steady state flow resistance of face sheets on fully assembled acoustic duct liners. Resistance is measured by subjecting the liner to a sinusoidal acoustic pressure field at the face sheet surface. The pressure field is applied through a cylindrical waveguide and is measured by a pressure transducer flush mounted on the inside of the waveguide near the liner face. A second pressure measurement, obtained by a similar transducer positioned further from the face, is combined with the first measurement to calculate the acoustic resistance for the excitation frequency. If the excitation frequency coincides with the resonant frequency of the liner configuration, then no significant pressure exists on the back surface of the liner face sheet. For this condition the root mean square (rms) pressure measured at the face sheet is equated to the static pressure drop used to obtain the steady state flow resistance. The rms velocity of the oscillating pressure wave is calculated from the ratio of the rms pressure to resistance. A repetition of the procedure for several magnitudes of dynamic pressure permits the development of a curve which describes the non-linear characteristics of resistance with changes in velocity. This curve may be equated to a similar curve obtained using steady state flow resistance measurements of the liner in its partially assembled state without a backing surface.
摘要翻译：用于确定完全组装的声管衬套上的面板的稳态流动阻力的装置和方法。电阻是通过对衬片进行面板表面的正弦声压场测量的。压力场通过圆柱形波导管施加，并通过平行安装在靠近衬垫面的波导内侧的压力传感器来测量。通过距表面更远的类似换能器获得的第二压力测量与第一测量结合以计算激发频率的声阻。如果激发频率与衬套结构的谐振频率一致，则衬垫面板的背面上没有明显的压力。对于这种情况，在面板处测量的均方根（rms）压力等于用于获得稳态流动阻力的静压力降。振荡压力波的均方根速度由均方根压力与电阻的比值计算。对于几个动态压力的重复程序允许开发描述电阻随速度变化的非线性特性的曲线。该曲线可以等于使用在其没有背衬表面的部分组装状态下的衬管的稳态流动阻力测量获得的类似曲线。

10. 发明授权

US6135238A Extended reaction acoustic liner for jet engines and the like 失效
标题翻译：用于喷气发动机的扩展反应声衬垫等
公开(公告)号：US6135238A
公开(公告)日：2000-10-24
申请号：US298599
申请日：1999-04-23
申请人： Noe Arcas , Frederick M. Hutto , Charles A. Parente
发明人： Noe Arcas , Frederick M. Hutto , Charles A. Parente
IPC分类号： B64C1/40 , B64C21/02 , B64C21/04 , B64C21/06 , B64D33/02 , B64D33/04 , F02C7/045 , F02K1/00 , F02K1/34 , F02K1/82 , E04B1/82
CPC分类号： B64C21/04 , B64C21/06 , B64D33/02 , B64D33/06 , F02C7/045 , F02K1/827 , B64C2230/04 , B64C2230/14 , B64C2230/22 , B64D2033/0206 , B64D2033/0226 , B64D2033/026 , B64D2033/0286 , Y02T50/166 , Y02T50/672
摘要： An extended reaction acoustic liner for use in jet engine noise mitigation has a substantially non-porous outer layer, a honeycomb core disposed in laminar juxtaposition to the outer layer, and a porous inner layer in laminar juxtaposition to the honeycomb core such that the honeycomb core is sandwiched between the outer layer and the inner layer. The honeycomb core comprises a plurality of cell walls defining a plurality of cells. Some of the cells are in fluid communication with one another via the openings formed in the cell walls. The openings in the cell walls cause viscous acoustic losses, resulting in acoustic energy dissipation and enhanced noise attenuation.
摘要翻译：用于喷气发动机噪声减轻的扩展反应声学衬垫具有基本上无孔的外层，与层叠并排设置在外层上的蜂窝芯，以及与蜂窝芯并置的多层内层，使得蜂窝芯夹在外层和内层之间。蜂窝芯包括限定多个单元的多个单元壁。一些细胞通过形成在细胞壁中的开口彼此流体连通。细胞壁中的开口引起粘性声学损失，导致声能消散和增强的噪声衰减。

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