ic

Apparatus for setting price for multi-vending machine and method thereof

Disclosed are an apparatus for setting a price for a multi-vending machine and a method thereof. The apparatus includes a price setting unit for inputting a price setting function, selecting a price setting column and inputting price information about the selected column; a control unit for controlling a price display of the selected column when the column is selected and the price information is input through the price setting unit; and a price display unit for displaying prices of products exhibited in a column according to a price display control of the control unit.




ic

Bezel assembly for use with an automated transaction device

The bezel assembly for data reception, for use with a bill validator in a financial transactional device, includes a bezel housing and a data reception assembly. The bezel housing includes a customer-facing front portion and a back plate connectable to the bill validator that is mounted within the transactional device cabinet. The front portion includes an insertion/dispensing slot for receiving currency and a projecting protrusion forward of the casing. The forward-extending protrusion accommodates at least a portion of the data reception assembly. The bezel assembly can include a wireless communication function that is communicably connectable with a mobile device via a wireless communication method, a manual entry function, a biometric reader, one or more cameras for scanning and decrypting 2D barcodes and the like, thus enhancing the overall functionality of the financial transactional device.




ic

Mobile communication device and method for identifying a counterfeit bill

An apparatus for identifying a counterfeit bill is provided. The apparatus includes a camera module configured to receive a captured IR image of a bill; a binary image generator configured to generate a binary image of the bill, based on the IR image; a distance value calculator configured to compare a predetermined area of the binary image with a predetermined area of a pre-stored real bill database corresponding to the predetermined area of the binary image; and a corrected image generator configured to generate a corrected image based on a result of the comparison.




ic

Dual validator self-service kiosk

Apparatus and methods are provided for a dual validator self-service kiosk (“SSK”). The SSK may include a first validator. The first validator may examine a deposit inserted into the SSK. The SSK may include a second validator. The second validator may examine a tangible item before the SSK dispenses the tangible item. The SSK may retract the tangible item if the tangible item in not collected by a customer. The second validator may examine the tangible item after being retracted by the SSK. The first validator may apply a first examination routine to the deposit. The second validator may apply a second examination routine before the SSK dispenses the tangible item. The second validator may apply a third examination routine to a tangible item retracted by the SSK.




ic

Paper-type detection device and detection method

A paper-type detection device comprises a sensor unit, a storage unit and a control unit. The sensor unit is used for detecting a transmission state of a paper according to a fixed clock period, and carrying out binaryzation on detected signals to indicate the presence-absence state of the paper. The storage unit is used for acquiring the signals detected by the sensor unit, acquiring paper information in the signals, and storing the paper information in sequence. The control unit comprises a first state counter and a second state counter. The control unit controls the two state counters for carrying out zero clearing and starting operations for counting in conjunction with the sensor unit.




ic

Device for receiving coins

Device for receiving coins improved in such a way that large amounts of coins can be received as well as separated reliably and quickly and such that the adverse influence of foreign matters introduced along with the coins on the coin separating function and/or on the performance of the coin separating unit may be reduced. The device includes an aperture for charging coins, a unit for separating coins and a feed unit for feeding coins which is provided with a guide face giving support to the coins during the feeding process and which is an active type feeder having a feed module (5) that is operable with the aid of an actuator means to feed coins toward the coin separating unit and that is designed such that the coins are transported toward the coin separating unit along said guide face.




ic

Currency bill processing device and method

A currency bill processing system includes a transport mechanism that is configured to transport bills from an input receptacle along a transport path that extends generally horizontally past at least one detector. The transport path transitions generally-vertically upward between a first and a second output receptacle. The transport mechanism is configured to deliver some of the bills toward a first end of the system into the first output receptacle and some of the bills toward a second end of the system into the second output receptacle. The system provides access openings in a front side of the system that are proximate the first and the second output receptacles thereby permitting operator access into the first and the second output receptacles from the front side.




ic

Medium storing device

A temporary storage in a medium storing device carries out ON/OFF monitoring of a jam sensor between a winding start position of a drum and a clamp point of a delivering roller. Accordingly, when bills are rewound in the reset operation, even when a relationship between a pulse count and a bill position becomes different from actual one, it is possible to detect, without using a pulse count, a jam between the winding start position and the clamp point. It is possible to more securely detect the abnormality in bill storing in comparison with the prior art.




ic

Sensor device in a bank note processing machine

A sensor device in a banknote processing machine comprising a transport device by means of which banknotes to be processed are transported past the sensor device, a cleaning device that cleans the sensor device or a transparent region of the sensor device, and a control device that controls the components of the banknote processing machine. The sensor device includes means for enlarging the spacing between the transport device and the sensor device. The control device controls the means and the cleaning device in such a way that the spacing between the transport device and the sensor device is enlarged by the means while the cleaning device cleans the sensor device.




ic

Medium storage and feeding device and medium processing device

A medium storage and feeding device and a medium processing device that may prevent occurrences of faults more reliably than the related art. A drum (21) is provided that winds up a banknote BL nipped by pairs of tapes (28L, 28R, 30L and 30R) together with the pairs of tapes. Torque limiters (25L, 25R, 27L and 27R) are separately provided at each of tape reels (24L, 24R, 26L and 26R). The torque limiters control torques between the tape reels and reel rotation axle shafts (22 and 23), such that tensions applied to the tapes between the tape reels (24L, 24R, 26L and 26R) and the drum (21) are constant. Thus, tensions on the tapes between the respective tape reels and the drum may be kept constant, banknote nipping stability may be improved, and occurrences of faults may be prevented more reliably than in the related art.




ic

Banknote handling device and passing unit used therein

A banknote handling device includes a safe that protects banknotes (casing of a second unit), a first conveyance path externally provided to the safe, and a second conveyance path internally provided to the safe. The safe is provided with at least one opening portion through which the banknotes pass. A passing unit including a passing conveyance mechanism that passes a banknote between the first conveyance path and the second conveyance path and a left-behind sensor that detects a banknote that is left-behind, is detachably installed inside the opening portion of the safe.




ic

Banknote processing device

A currency note processing device has a deposit opening. A currency note recognition section recognizes unique information of a deposited currency. A currency note storage section accumulates the deposited currency notes. A transportation control section controls the transportation of the deposited currency note such that the currency note is transported directly to the currency note storage section, and when a return instruction for the deposited currency note is detected, controls the transportation of the deposited currency note from the currency note storage section to the currency note recognition section. A comparison section compares the unique information recognized at the time of the first transportation, from the deposit opening to the currency note recognition section, is compared to unique information recognized at the time of the second transportation, from the currency note storage section to the currency note recognition section.




ic

Self-service kiosk validator bridge

Apparatus and methods for a self-service kiosk (“SSK”) validator bridge are provided. The SSK may include a bridge linking a dispenser and a validator. The bridge may be configured to transfer a tangible item from the validator to the dispenser. The validator may examine the tangible item prior to a dispensing of the tangible item to a SSK customer. The tangible item may be retracted by the dispenser. The bridge may transfer the tangible item from the dispenser to the validator. The SSK may include an acceptor. The bridge may link the acceptor to the validator. The bridge may be configured to transfer a deposit from the acceptor to the validator. The validator may examine the deposit.




ic

Banknote processing device

A banknote processing device that stacks banknotes in a banknote storage section even when a jam occurs. The device has an insertion aperture, a verification section, the storage section and a controller. The aperture separates and feeds inserted banknotes. The verification section verifies the banknotes fed from the aperture. The banknotes are stacked in the storage section. The controller controls conveyance of the banknotes conveyed from the aperture to the verification section such that, depending on verification results, the banknotes are conveyed directly to the storage section. When a jam occurs during conveyance of the banknotes, the controller stops the separation and feeding of the banknotes from the aperture, and controls conveyance such that banknotes for which the storage section has been set as a conveyance destination by the verification section are conveyed directly to the storage section and banknotes for which no conveyance destination has been set are ejected.




ic

Reductant delivery unit for automotive selective catalytic reduction with gasket anti-deposit shielding structure

A reductant delivery unit (10) includes a fluid injector (12) and a flange (20) coupled with the fluid injector. An exhaust boss (28) has a surface (39) defining a through-hole (40) that communicates with a vehicle's exhaust flow path. The flange is coupled to a mounting surface such that the outlet of the fluid injector communicates with the exhaust flow path so as to control injection of urea solution into the exhaust gas flow path. A gasket (32) is sandwiched between the flange and the mounting surface. The gasket has a surface (37) defining a through-hole (38) therein that communicates with the through-hole in the exhaust boss to permit the urea solution to pass from the fluid outlet to the exhaust flow path. Gasket shielding structure (44) covers the surface defining the through-hole in the gasket to prevent the urea solution from contacting the gasket.




ic

Low-friction seal ring with inexpensive diamond coating

The present invention refers to a seal ring for a mechanical seal, comprising: a base body (2) with a diamond layer (3) which is applied to the base body (2) and configured as a sliding surface, wherein the diamond layer (3) has a thickness (D) which is less than or equal to 4 μm, particularly less than or equal to 3 μm, particularly less than or equal to 2 μm, particularly preferably about 1 μm, and wherein the base body (2) is without fissures or only comprises fissures that have a maximum longitudinal extension (L) on a surface of the base body (2) or in the base body (2) that is less than or equal to 5 μm.




ic

Fiber reinforced elastomer anisotropic annular blowout preventer

A packer unit for an annular blowout preventer including an annular elastomer body including an elastomer having a unidirectional grain and a quantity of fiber longitudinally aligned with the grain of the elastomer. A method of forming a packing unit for a blowout preventer including forming a fiber reinforced elastomer by aligning fibers with a grain of an elastomer; cutting a portion from the fiber reinforced elastomer in the direction of the grain; loading the cut portion in a packing unit mold such that the grain of the fiber reinforced elastomer of the cut portion is parallel to a packing unit axis; and heating the loaded packing unit mold.




ic

Spherical annular seal member and method of manufacturing the same

A spherical annular seal member 40 includes: a spherical annular base member 38 which is defined by a cylindrical inner surface 34 defining a through hole 33 in a central portion, a partially convex spherical surface 35, and annular end faces 36 and 37 on large- and small-diameter sides of the partially convex spherical surface 35; and an outer layer 39 formed integrally on the partially convex spherical surface 35 of the spherical annular base member 38.




ic

Oil-lubricated anti-friction bearing

An oil-lubricated anti-friction bearing is provided for a horizontal arrangement of a rotational axis with a shaft seal that separates a bearing inner chamber, which accommodates rolling bodies, from a bearing outer side, and has a clamping arrangement which acts on the shaft seal from a bearing outer side in order to fix the shaft seal axially. The clamping arrangement has an outlet for oil.




ic

Fluidic processor and method of use

A fluidic processor includes a first sealing member having a first sealing face, a first compressive face and at least one first sealing member fluid conduit; a second sealing member having a second sealing face, a second compressive face and at least one second sealing member fluid conduit; the second sealing face of the second sealing member being sealingly and slidingly engaged in a substantially fluid tight manner with the first sealing face of the first sealing member; and at least one actuator mechanically engaging at least one of the first sealing member and the second sealing member, or an XY stage, or mechanism that provides motion in two axes on one sealing member only.




ic

Ceramic collars for active brazing in sodium-based thermal batteries

The present application provides for ceramic collars and metal rings for active brazing in sodium-based thermal batteries. The ceramic collar may be an alpha-alumina collar configured for active brazing, and thereby sealing, to outer and inner Ni rings for use in NaMx cells. The portions of the alpha-alumina collar active brazed to the outer and inner Ni rings may be outwardly facing and include inwardly extending recesses. The portions of the outer and inner Ni rings active brazed to the outwardly facing portions of the collar may be inwardly facing. The alpha-alumina collar may include a greater coefficient of thermal expansion than each of the outer and inner Ni rings, and the alpha-alumina collar and outer and inner Ni rings may be configured such that a portion of the outer and inner Ni rings is deformed into the inwardly extending recesses of the alpha-alumina collar after active brazing thereof.




ic

Gasket for vehicle

A gasket for a vehicle is configured to improve performance of a turbocharger according to enhanced sealing performance. The gasket is disposed at a coupling portion of a cylinder head of an engine and an exhaust manifold adapted to supply exhaust gas from the cylinder head to a turbocharger.




ic

Hydrodynamic non-contacting seal

A hydrodynamic non-contacting seal wherein the sealing surface of a rotatable sealing member is grooved in a spiral pattern such that the depth of the grooves decreases in a direction opposite to the direction of rotation of the rotatable sealing member.




ic

Speaker diaphragm, speaker, and electronic equipment and mobile device using the speaker

A speaker diaphragm of the present invention is formed by mixing polylactic acid as a plant-derived resin, bamboo fibers and a natural binder. It is thereby possible to realize a speaker diaphragm capable of obtaining sufficient sound velocity, while having low environmental load and high sound quality.




ic

Aircraft nacelle including an optimised acoustic processing system

An aircraft nacelle including a pipe (32), a peripheral wall (34), a lip (36), and a front frame (38) connecting the peripheral wall (34) and the pipe (32) and forming with the lip (36) a space (50) in which the hot air that is provided for frost treatment can circulate, with the pipe (32) including a coating (44) for the composite material acoustic treatment, is characterized in that the nacelle includes at least one element (52) made of a heat-conducting material inserted between the lip (36) and the pipe (32) ensuring the continuity of the aerodynamic surfaces of the lip (36) and the pipe (32) and the propagation of heat from the space (50) toward the rear of the nacelle, whereby the at least one element (52) includes a coating (54) for acoustic treatment that is made of a heat-resistant material.




ic

Positioning an input transducer for an earpiece based upon dynamic data

The attenuation and other optical properties of a medium are exploited to measure a thickness of the medium between a sensor and a target surface. Disclosed herein are various mediums, arrangements of hardware, and processing techniques that can be used to capture these thickness measurements and obtain dynamic three-dimensional images of the target surface in a variety of imaging contexts. This includes general techniques for imaging interior/concave surfaces as well as exterior/convex surfaces, as well as specific adaptations of these techniques to imaging ear canals, human dentition, and so forth.




ic

Digital communication system for loudspeakers

A communication system for communicating with at least one loudspeaker is described where the loudspeaker is connected to audio equipment over standard two-wire speaker wire operable to carry an audio signal. The communication system includes a master node in electrical communication with a signal path carrying the audio signal between the audio equipment and the loudspeaker, the master node also including an interface with the audio equipment, a data encoder operable to encode data signals, a data transceiver operable to place the data signals onto the audio signal at frequencies above audio frequencies. The communication system also includes at least one slave node in electrical communication with the audio signal and each loudspeaker, the slave node including a data transceiver operable to receive data signals from the master node, a data decoder, and an interface able to communicate with the loudspeaker.




ic

Earphone device

An earphone device includes a housing having a driver unit, and a sound guide tube mounted on a front surface of the housing to protrude from the front surface, in which the sound guide tube is disposed at a position deviated from a center position of the housing.




ic

Saddle-ride type vehicle

A saddle-ride type vehicle which includes catalyst devices in left and right exhaust flow passages can suppress effect of the catalyst devices on the reach to the ground even if the sizes of catalysts are large. The vehicle includes: exhaust flow passages connected to a multi-cylinder engine and disposed independently on left and right sides of a vehicle body; a first catalyst device provided in a middle of the left exhaust flow passage; a second catalyst device provided in a middle of the right exhaust flow passage; a swing arm pivotally supporting a rear wheel such that the rear wheel is swingable, the saddle-ride type vehicle includes silencers connected to portions of the exhaust flow passages downstream of the first catalyst device and the second catalyst device, and the first catalyst device and the second catalyst device are arranged side by side below the swing arm.




ic

Anchoring of septums in acoustic honeycomb

A honeycomb structure dial includes cells in which septums are located to provide acoustic dampening. The cells are formed by at least our walls wherein at least two of the walls are substantially parallel to each other. The septums include warp fibers and weft fibers that are substantially perpendicular to each other. The septums are oriented in the honeycomb cells such that the weft fibers and/or warp fibers are substantially perpendicular to the parallel walls.




ic

Deghosting using measurement data from seismic sensors

Measurement data is received from first and second seismic sensors, where the first and second seismic sensors are oriented in opposite directions. Each of the first and second seismic sensors has a sensing element responsive to pressure and particle motion. The signals can be combined to remove the particle motion component of the measurement data and obtain pressure-only data. Alternatively, the signals can be combined to deghost the received measurement data.




ic

Bone conduction device having an integrated housing and vibrator mass

A bone conduction hearing aid device comprising a vibrator configured to vibrate in response to sound signals received by the device. The device further comprises a housing mass forming a housing for one or more operational components of the device, wherein the housing mass is attached to the vibrator so as to move in response to the vibration. The device also comprises a coupling configured to attach the device to a recipient so as to deliver the generated mechanical to the recipient's skull.




ic

Muffler equipped with catalytic converter

A muffler is capable of stably supporting the catalytic converter in a muffler box with a pair of partitions. The muffler box includes first and second box halves joined together with open surfaces thereof abutting each other, and first and second partition plates interposed between the first and second box halves and overlapping each other to separate inside of the muffler box into first and second silencing chambers and define a third silencing chamber between the first and second partition plates, one end opening of a cylindrical holding tube housing and holding the catalytic converter is connected to the exhaust inlet pipe, the pair of partition plates support the holding tube in such a way as to wrap an outer peripheral surface thereof, and another end opening of the holding tube is communicated with the exhaust outlet pipe through the first, second, and third silencing chambers in this order.




ic

Electro-pneumatic sound alarm

Herein described is an electro-pneumatic sound alarm, to be fitted on a two or four wheeled vehicle, constituted by an electro-compressor (2), having the function of drawing atmospheric air, compressing it and conveying it to an acoustic group (3). Such sound alarm (1) is characterized in that the electro-compressor (2) and the acoustic group (3) are mutually held by means of removable fit-coupling; furthermore, the coupling elements are rigid and integral with the aforementioned two components (FIG. 1).




ic

Hearing assistance device and method

A device and attendant method to assist the hearing of a user by being removably connected to and disposing a user's ear in an enhanced hearing orientation. The device includes an elongated base, which may be disposable, and has a sufficient length to be disposed in an operative position behind the user's ear. Opposite ends of the base include an adhesive material secured to a common side thereof, wherein different ones of said opposite ends are respectively disposed and maintained in confronting engagement with a rear surface of the ear and adjacently disposed portion of the user's head. The base further includes biasing capabilities disposed and structured to exert a sufficient, forwardly and outwardly directed force on the user's ear to dispose and maintain it in the enhanced hearing orientation, when the base is in the operative position.




ic

Bonding structure of diaphragm for microspeaker

The present invention relates to an assembly structure of a diaphragm for a microspeaker. The present invention discloses a bonding structure of a diaphragm for a microspeaker, the boding structure comprising: a suspension including a central portion, an outer peripheral portion, and a connecting portion connecting the central portion and the outer peripheral portion; and a side diaphragm including an inner peripheral portion and an outer peripheral portion, which are attached to the central portion and outer peripheral portion of the suspension, respectively, and a dome portion, which projects between the inner peripheral portion and the outer peripheral portion, wherein the suspension and the side diaphragm are attached by thermal compression.




ic

Protective enclosure for enhancing sound from an electronic device

A protective enclosure for an electronic device can include a waveguide to direct and enhance sound waves emanating from a speaker of an electronic device when installed in the protective enclosure. The waveguide can include a first end and a second end. The first end of the waveguide can be located proximate the speaker of the electronic device. The waveguide can increase in cross-sectional area between the first end and the second end.




ic

Synthetic jet muffler

A synthetic jet muffler includes an exit end, a propagation path for conducting a first sound wave emitted by a synthetic jet generator to the exit end, and a shroud for conducting a second sound wave emitted from the synthetic jet generator in a direction opposite to the first sound wave to the exit end, wherein the shroud is disposed so that the first and second sound waves travel different distances to effect noise cancellation at the exit end.




ic

Acoustic container

Methods and devices are disclosed for a gaseous liquid to audibly deform the shape of a closed container. One embodiment includes pushing inward to depress a plurality of deformations integral with an exterior of the plastic container having a bottom, a top, the exterior, and an interior, wherein the top is at least partially opened. Further, the method includes sealing, subsequent to the depressing, the top to close the plastic container. Further still, the method includes pushing outward, subsequent to the sealing, by carbonation from a carbonated liquid contained within the interior, on the plurality of deformations. Yet further, the method includes deforming, by the pushing outward, at least two of the plurality of deformations to displaced positions. The method also includes creating two or more sounds and/or movement by the deforming.




ic

Enhanced, lightweight acoustic scrim barrier

An enhanced, lightweight acoustic absorber is provided. The acoustic absorber is bounded by the at least one scrim layer without need for additional layers, such as melt-blown or nonwoven layers. The at least one scrim layer includes at least one non-planar, folded scrim layer bonded to itself or another scrim layer to form a plurality of air spaces between folded portions of the at least one scrim layer. The at least one scrim layer establishes a thickness of the acoustic absorber extending across opposite exposed sides of the acoustic absorber.




ic

Acoustic sensor assembly

An acoustic sensor is configured to provide accurate and robust measurement of bodily sounds under a variety of conditions, such as in noisy environments or in situations in which stress, strain, or movement may be imparted onto a sensor with respect to a patient. Embodiments of the sensor provide a conformable electrical shielding, as well as improved acoustic and mechanical coupling between the sensor and the measurement site.




ic

Vertical line array loudspeaker mounting and adjustment system

The invention relates to a loudspeaker mounting and adjustment system and method for installing and operating a professional audio system used in a stadium, concert hall or the like. The system comprises a vertical array of loudspeaker cabinets that can be suspended from a ceiling and that enables the horizontal and vertical angle of the sound dispersion field to be adjusted remotely and/or automatically while the system is suspended. Each loudspeaker cabinet is connected to a vertically adjacent loudspeaker cabinet via a pair of levers located on either side of the cabinet that control the angle between adjacent loudspeaker cabinets. A linear actuator is connected to each lever for controlling the lever position. Each loudspeaker cabinet also comprises a waveguide with at least one actuator for modifying the waveguide angle and thus the horizontal angle of the sound dispersion field.




ic

Protective enclosure for enhancing sound from an electronic device

A protective enclosure for an electronic device can include a waveguide to direct and enhance sound waves emanating from a speaker of an electronic device when installed in the protective enclosure. The waveguide can include a first end and a second end. The first end of the waveguide can be located proximate the speaker of the electronic device. The waveguide can increase in cross-sectional area between the first end and the second end. The second end of the waveguide can be located proximate a front surface of the protective enclosure and can direct sound waves toward a user of the electronic device.




ic

Sound suppressor device for an air drying unit of a compressed-air supply system

A sound suppressor device for an air drying unit of a compressed-air supply system having a sound suppressor housing on which is arranged an inlet opening for the supply of condensate-laden compressed air to be discharged from the air drying unit and at least one outlet opening for the discharge of the condensate-laden compressed air to the outside, wherein the inlet opening issues into at least one pre-chamber of the sound suppressor housing, which pre-chamber issues into post-chambers which are connected in parallel and which are arranged around a heating rod arranged centrally in the sound suppressor housing.




ic

Broadband flex joint isolator for acoustic tools

An acoustic attenuator assembly for an acoustic tool for performing acoustic investigation of a subterranean formation is disclosed. The acoustic attenuator assembly includes a first end portion (205) and a second end portion (210) having a bore therethough to enable passage of an electrical line. The acoustic attenuator assembly further includes a fiber portion (230) disposed between the first and second end portion so that the fiber portion attenuates at least a portion of acoustic energy when the acoustic energy is received by one or both of the first (205) and second (210) end portions. The fiber portion (230) includes a continuous flexible portion that allows relative deflection of the first (205) and second (210) end portions.




ic

Sound absorbing body and printing device

A sound absorbing body includes a fibrillated part fibrillated into fiber form, and an unfibrillated part that is not fibrillated into fiber form. The unfibrillated part is dispersed inside the single sound absorbing body.




ic

Sound absorbing body and printing device

A printing device includes a case, a printing unit arranged inside the case, and a sound absorbing body arranged inside the case. The sound absorbing body has parts with different densities including a dense part with a higher density and a non-dense part with a lower density. The non-dense part includes a fibrillated part that is fibrillated into fiber form, and an unfibrillated part that is not fibrillated into fiber form.




ic

Sound absorbing body and electronic device

A sound absorbing body includes parts of different densities including a plurality of non-dense parts of lower density and a plurality of dense parts of higher density. The non-dense parts and the dense parts are alternately laminated obliquely.




ic

Acoustic cover assembly

An acoustic protective cover assembly comprising a porous membrane and an acoustic gasket is disclosed. The porous membrane is bonded to the acoustic gasket at a peripheral region, the membrane is left unhanded at a central region. The acoustic gasket comprises a composite of a porous polytetrafluoroethylene (PTFE) polymer matrix of polymeric nodes interconnected by fibrils, resilient expandable microspheres embedded within the matrix.




ic

Thermal-acoustic sections for an aircraft

Embodiments of thermal-acoustic sections for an aircraft for reducing noise along an acoustic path produced from an acoustic source are provided herein. The thermal-acoustic section comprises a first porous layer having a first characteristic acoustic impedance. A second porous layer is disposed adjacent to the first porous layer and has a second characteristic acoustic impedance that is greater than the first characteristic acoustic impedance. The thermal-acoustic section is configured to be positioned along the acoustic path such that at least a portion of the noise from the acoustic source is directed through the first porous layer to the second porous layer to promote absorption of the noise.