摘要:
A multi-sectional acoustic septum that includes sections which have different acoustic resistance properties. The multi-sectional acoustic septums extend vertically with the acoustic cell and are capable of increasing the effective acoustical length of the acoustic cell. The multiple acoustic properties provided by the multiple acoustic sections also make it possible to target specific frequency ranges within the overall frequency range of the acoustic cell.
摘要:
The invention relates to a bag (1) for insertion into a cavity of a silencer, which cavity is intended for sound damping or absorption, having a cover (2) which is closed on all sides and having a sound-damping or sound-absorbing filling (3). It is provided according to the invention that the cover consists of glass fibres and the filling is blown into the interior of the bag through the cover of the bag.
摘要:
A lightweight radio/CD player for vehicular application is virtually "fastenerless" and includes a case and frontal interface formed of polymer based material that is molded to provide details to accept audio devices such as playback mechanisms (if desired) and radio receivers, as well as the circuit boards required for electrical control and display. The case and frontal interface are of composite structure, including an insert molded electrically conductive wire mesh screen that has been pre-formed to contour with the molding operation. The wire mesh provides EMC, RFI, BCI and ESD shielding and grounding of the circuit boards via exposed wire mesh pads and adjacent ground clips. The PCB architecture is bifurcated into a first board carrying common circuit components in a surface mount configuration suitable for high volume production, and a second board carrying application specific circuit components in a wave soldered stick mount configuration. The major components and subassemblies are self-fixturing during the final assembly process, eliminating the need for dedicated tools, fixtures and assembly equipment. The major components and subassemblies self-interconnect by integral guide and connection features effecting "slide lock" and "snap lock" self-interconnection. The radio architecture includes improved push buttons employing 4-bar living hinge linkage and front loaded decorative trim buttons.
摘要:
The invention is intended to facilitate the production of ambient noise- cancelling earphones and, to that end, provides a module (30) comprising a microspeaker (34) and an electret microphone (38) both carried on a common substrate (32) which is also configured to incorporate an acoustic resistor (33, 35). The module (30) is incorporated into an earpiece having electrical connections to noise-cancelling electronic circuitry that is provided separately from the earpiece and is housed, for example, in a separate pod (82, 102) or incorporated within the body of a cellular telephone. The performances of the microspeaker (34) and microphone (38) are classified against one or more predetermined operational criteria, enabling the noise-cancelling circuitry to be configured to allow for departures from such criteria. In some embodiments, the module (30) further comprises an information storage device (40) capable of recording data concerning departures from the aforementioned criteria and of providing, upon interrogation, information over the electrical connection to automatically compensate for such departures. The invention also comprises a method of producing ambient noise-cancelling earphones in which the components on the module (30) are classified inter alia by feeding known signals to the microphone (38) and noting the response of the speaker (34) thereto.
摘要:
The invention includes a method of joining edges of adjacent honeycomb core panel sections. In one embodiment, the method includes forming a first edge along a first cellular core panel section. The first edge includes a first plurality of edge cell walls along the first edge. The method further includes forming a second edge along a second cellular core panel section, wherein the second edge includes a second plurality of edge cell walls along the second edge. The first edge is positioned proximate to the second edge. At least a portion of at least one of the first plurality of edge cell walls is mechanically interlocked with at least a portion of at least one of the second plurality of edge cell walls to form a joint therebetween. The invention also includes a composite structure at least partially produced by such a method.
摘要:
Die Erfindung gibt ein Faceplate (1) eines Hörgerätegehäuses (2) mit mindestens einer in eine Öffnung (12) des Faceplates einbaubaren Komponente (3) und ein dazugehöriges Verfahren an. Das Faceplate (1) wird aus einem ersten Material gebildet. Beim Unterschreiten eines vorgebbaren Abstands (6) zwischen Auflagefläche (4) der Komponente (3) in der Öffnung (12) und der der Außenseite des Faceplates (1) abgewandten Oberfläche (5) wird ein zweites Material (7) unterhalb der Auflagefläche (4) auf der Oberfläche (5) des Faceplates (1) derart angebracht, dass der vorgebbare Abstand (6) herstellbar ist. Dadurch ist auch bei eingebauten Komponenten (3), beispielsweise Lautstärkeregler oder Programmwahlschalter, die mechanische Stabilität des Faceplates (1) gewährleistet.
摘要:
A lightweight radio/CD player for vehicular application is virtually "fastenerless" and includes a case and frontal interface formed of polymer based material that is molded to provide details to accept audio devices such as playback mechanisms (if desired) and radio receivers, as well as the circuit boards required for electrical control and display. The case and frontal interface are of composite structure, including an insert molded electrically conductive wire mesh screen that has been pre-formed to contour with the molding operation. The wire mesh provides EMC, RFI, BCI and ESD shielding and grounding of the circuit boards via exposed wire mesh pads and adjacent ground clips. The PCB architecture is bifurcated into a first board carrying common circuit components in a surface mount configuration suitable for high volume production, and a second board carrying application specific circuit components in a wave soldered stick mount configuration. The major components and subassemblies are self-fixturing during the final assembly process, eliminating the need for dedicated tools, fixtures and assembly equipment. The major components and subassemblies self-interconnect by integral guide and connection features effecting "slide lock" and "snap lock" self-interconnection. The radio architecture includes improved push buttons employing 4-bar living hinge linkage and front loaded decorative trim buttons.