30results about How to "Effective noise isolation" patented technology

A holder (3) serves for fastening a distributor tube (4) of a fuel distributor (2) to an add-on structure (5). The holder (3) comprises a first half shell (15) and a second half shell (16). An elastically deformable damping element (20) is injection moulded onto a holding region (17) of the first half shell (15). Furthermore, an elastically deformable damping element (22) is injection moulded onto a holding region (18) of the second half shell (16). For the fastening of the distributor tube (4) to the add-on structure (5), the half shells (15, 16) are joinable to each other in such a manner that the half shells (15, 16) surround the tubular component (4) and hold the tubular component (4) by means of the elastic damping elements (20, 22). The first half shell (15) and the second half shell (16) can be connected to each other here by means of a film hinge (28). A further configuration possibility consists in that the damping element (20, 22) is inserted into the relevant half shell (15, 16).

The invention discloses a concrete vibration device. The concrete vibration device comprises a sound-proof shell which comprises an outer layer, a first sound-proof felt layer, a lightgage steel joistlayer, a second sound-proof felt layer and a gypsum board from outside to inside in sequence, a vibration opening is formed in the lower end of the sound-proof shell, a left cylinder and a right cylinder are arranged in the sound-proof shell, and first round holes are formed in the middles of the lower ends of the cylinders. Pistons are arranged in the cylinders, the lower ends of the pistons areconnected with piston rods, an air bag is fixedly installed in the sound-proof shell, and the air bag is communicated into the left and right cylinders. A plate vibrator is installed in the middle inthe sound-proof shell, the vibration output end on the lower side of the plate vibrator is fixedly provided with a vertical column, and the lower end of the vertical column is fixedly provided with apress plate. Oblique rods are arranged between the vertical column and the piston rods respectively, the middles of the oblique rods are hinged to the sound-proof shell, one end of each oblique rod is hinged to the vertical column, the other ends of the oblique rods are hinged to the lower ends of the piston rods, and an observation window is formed in the side wall of the sound-proof shell. Theconcrete vibration device is low in noise and small in shell vibration.

An earphone device comprises an inner casing enclosing one or more miniature drive units, and a movable cap or outer casing that moves relative to the inner casing. The inner casing has an extension member, such as a hollow post, terminating in an acoustic output port. A compressible foam bulb at least partially surrounds the extension member, and is decompressed and compressed by actuation of an adjustable member. The adjustable member may take the form, for example, of a pivoting lever, a helical cam, or a push-rod mechanism, among other things. A flange may be disposed around the periphery of the movable cap, in order to provide a seal surrounding the ear canal region. The compressible material may be gripped by the hollow extension member, and abut the movable cap or flange. Through actuation of the adjustable member, the compressible material may be decompressed and thus elongated for insertion into the wearer's ear, and may be compressed and thus widened or expanded to form an adequate seal with the wearer's ear canal region.

The invention discloses an interior decoration integrated wallboard, and relates to the technical field of integrated wallboards, in particular to an interior decoration integrated wallboard. The interior decoration integrated wallboard comprises a protective ring, symmetrically distributed outer folded angle plates are movably connected to the two ends of the inner side of the protective ring, inner folded angle plates are placed on the outer side of the protective ring, an auxiliary plate is movably connected to the inner side of the protective ring, clamping grooves which are symmetricallydistributed are formed in the outer portion of the auxiliary plate, and a main plate is movably connected to the clamping grooves in the outer portion of the auxiliary plate in a clamped mode. According to the interior decoration integrated wallboard, a first compression plate and a second compression plate which are tightly compressed are fixedly connected to the inner sides of a first paint panel and a second paint panel, and after the first compression plate and the second compression plate are tightly compressed, the internal structure of the board is more compact, and therefore, the problems that a gap of a wallboard is too large, and consequently, the wallboard is prone to be burnt due to the fact that the wallboard is simply pasted only through artificial plywood in the prior art are effectively solved.