Abstract: A laminated glazing includes a first and a second glass sheet that are bonded by a first interlayer adhesive layer, a peripheral zone of the laminated glazing being covered by a stepped metal element, the laminated glazing including a heating network of wires and/or a heating electrically conductive layer that is provided with busbars, a plurality of probes and other optional electrical elements that are linked to an electrical power supply via the connector of the laminated glazing, an electrical conductor linking the stepped metal element to a busbar of the heating network of wires and/or of the heating electrically conductive layer; and/or to the cap of the connector of the laminated glazing, which is linked to the ground of the structure for mounting the laminated glazing; and/or to a contact of the connector.

Abstract: A laminated glazing includes a first and a second glass sheet that are bonded by a first interlayer adhesive layer, a peripheral zone of the laminated glazing being covered by a stepped metal element, a window press that is rigidly connected to the structure for mounting the laminated glazing making contact with the laminated glazing, so as to hold the laminated glazing secure to its mounting structure, an electrical conductor linking the stepped metal element and the structure for mounting the laminated glazing by way of the window press.

Abstract: A laminated glazing includes a first and a second glass sheet that are bonded by a first interlayer adhesive layer, a peripheral zone of the laminated glazing being covered by a stepped metal element, a window press that is rigidly connected to the structure for mounting the laminated glazing making contact with the laminated glazing, so as to hold the laminated glazing secure to its mounting structure, an electrical conductor linking the stepped metal element and the structure for mounting the laminated glazing by way of the window press.

Abstract: A laminated glazing includes a first and a second glass sheet that are bonded by a first interlayer adhesive layer, a peripheral zone of the laminated glazing being covered by a stepped metal element, the laminated glazing including a heating network of wires and/or a heating electrically conductive layer that is provided with busbars, a plurality of probes and other optional electrical elements that are linked to an electrical power supply via the connector of the laminated glazing, an electrical conductor linking the stepped metal element to a busbar of the heating network of wires and/or of the heating electrically conductive layer; and/or to the cap of the connector of the laminated glazing, which is linked to the ground of the structure for mounting the laminated glazing; and/or to a contact of the connector.

Abstract: An acoustic measurement device in an air flow and subjected to a noise source, the device including: a base having a surface in contact with the air flow, a first microphone which is mounted flush with the surface, a second and a third microphone which are mounted on either side of the first microphone, each, at the bottom of a cavity opening onto the surface, and where each of the second and third microphones is covered with a noise-reducing element, the second and the third microphones being assembled at a distance from the first microphone that is greater than the correlation length of the turbulent phenomenon in the frequency band studied, and a computer or processor provided for computing the power spectrum of the noise source from the signals detected by the three microphones.

Abstract: An acoustic measurement device in an air flow and subjected to a noise source, the device including: a base having a surface in contact with the air flow, a first microphone which is mounted flush with the surface, a second and a third microphone which are mounted on either side of the first microphone, each, at the bottom of a cavity opening onto the surface, and where each of the second and third microphones is covered with a noise-reducing element, the second and the third microphones being assembled at a distance from the first microphone that is greater than the correlation length of the turbulent phenomenon in the frequency band studied, and a computer or processor provided for computing the power spectrum of the noise source from the signals detected by the three microphones.

Abstract: A soundproofing panel having a core sandwiched between a solid wall and a porous wall. The core being connected to the walls and having partitions extending in the thickness direction between the two walls so as to form cells. Each cell containing at least one sound energy dissipating layer constituted by hollow spherical beads having mutually contacting walls that are porous and micro-perforated, and being held in position in the thickness direction between the two walls by nets that are secured to the partitions.

Abstract: A damping structure includes a member defining an internal cavity; an aggregate which includes at least solid bodies in contact and which completely fills the internal cavity; a rigid plate for closing off the internal cavity; and an elastic element which exerts elastic pressure on the rigid plate so as to constrain the aggregate. The member defining the cavity may be elongate with the internal cavity being formed longitudinally inside the member. At least some of said solid bodies may be hollow or solid, compact, made of different materials, of different shapes, and/or of different sizes.

Abstract: A damping structure includes a member defining an internal cavity; an aggregate which includes at least solid bodies in contact and which completely fills the internal cavity; a rigid plate for closing off the internal cavity; and an elastic element which exerts elastic pressure on the rigid plate so as to constrain the aggregate. The member defining the cavity may be elongate with the internal cavity being formed longitudinally inside the member. At least some of said solid bodies may be hollow or solid, compact, made of different materials, of different shapes, and/or of different sizes.

Abstract: A damping structure includes a member defining an internal cavity; an aggregate which includes at least solid bodies in contact and which completely fills the internal cavity; a rigid plate for closing off the internal cavity; and an elastic element which exerts elastic pressure on the rigid plate so as to constrain the aggregate. The member defining the cavity may be elongate with the internal cavity being formed longitudinally inside the member. At least some of said solid bodies may be hollow or solid, compact, made of different materials, of different shapes, and/or of different sizes.

Abstract: A method of fabricating hollow spheres that involve cores in a mixer are covered by a polymeric binder; a first powder material is prepared in the form of an organic powder or a metal or mineral powder or fibers, and a second powder material that is can be decomposed by heat and/or that is soluble in a solvent; said powder materials are mixed together and added into the mixer; the resulting coated cores are dried; the coated cores are baking to destroy the cores and the second powder material, and to cross-link the binder so as to obtain hollow spheres with walls that are porous and perforated; optionally the spheres are immersed in a solvent; and said hollow spheres are subjected to mechanical piercing. Hollow spheres, and a sound-absorber device making use of them.

Abstract: A soundproofing panel (2) comprises a core (4) sandwiched between a solid wall (6) and a porous wall (8), the core being connected to the walls and comprising partitions (12) extending in the thickness direction between the two walls so as to form cells (10) each cell containing at least one sound energy dissipating layer (14), the dissipating layers (14) being constituted by hollow spherical beads (20) having mutually contacting walls that are porous and micro-perforated, and being held in position in the thickness direction between the two walls (6, 8) by nets (22) that are secured to the partitions.

Abstract: The invention concerns a sound-proofing panel, in particular a rotorcraft structural or lining panel: the sound-proofing panel (1) comprises at least two opposite plates (2, 3, 5, 6) forming between them a closed internal space (4), and an aggregate (7) including at least solid elements (8) in contact and which fills entirely said internal space (4).

Abstract: A composition for reducing vibrations, including both damping structure borne vibrations and reducing radiated airborne noise. The composition is either a mixture of at least two different granular materials, or is a granular material having a bulk sound speed of less than 90 m/s. The damping properties of a mixture can be calculated from the bulk densities and stiffnesses of its individual components.