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Type of noise

Type of noise

Noise mainly he falls into two types. Airborne – Sound that propagates through the air. Noises include people talking, cars moving outside windows, dogs barking, etc. This noise enters the room through windows, cracks and gaps in walls and ceilings. Shock (vibration) – occurs during contact with building structures and is distributed at a high level. Such noise can be heard when moving furniture, dropping various objects on the floor, or performing repair work. Structural noise is also generated and propagated by vibrations during operation of equipment such as drills and hammer drills. This can be considered a special case for percussion instruments.

Ceiling soundproof

A common method of soundproofing a ceiling is to install a suspension system. Space can be created between the floor slab and decorative trim. The empty space is filled with a porous material to absorb sound. Slabs with a thickness of at least 5 cm and soft stone wool are used for soundproofing of the ceiling.

Best soundproofing

Impact noise is produced when impact loads are applied to the building structure, such as dropping an object to the floor or working with a hammer. Shock waves travel through load-bearing structures such as walls and ceilings. Airborne noise is normal sound that travels through the air. Obstructions reduce the level of airborne noise, but the effectiveness of a sound barrier is determined by the sound absorption capacity of the building structure and its thickness. Structural noise – technical noise generated by technical communications in pipes, ventilation shafts, electrical networks and electrical equipment, fa├žade structures, etc. Acoustic noise is the echo produced by a large number of surfaces with low absorption capacity, and is especially characteristic of an empty, unfurnished room. Insulation can primarily affect impact, airborne, and structural noise. Acoustic noise always requires separate work taking into account the acoustic properties of the room.

Soundproofing of ventilation rooms

A question often asked by office building designers and owners is, “How can I protect myself from ventilation room noise?” This question usually “pops up” when the equipment is already installed and actively used. Often the rooms in the ventilation chamber are so small that it is impossible to place a 130 mm thick lining on the walls and ceiling. It is difficult for dense people to do this. Wedged between the wall and the device. The situation is aggravated by the presence of lightweight partitions (foam blocks, hollow bricks, etc.) with numerous holes for air ducts.

We have compiled a list of recommendations for reducing noise in ventilated rooms.

  • installation of equipment and air ducts of ventilation systems on effective vibration isolation to prevent equipment vibrations from being transmitted to the building structure);
  • Eliminate rigid connections when air ducts pass through walls, preventing equipment vibrations from being transferred to the building structure.
  • Wall and ceiling cladding with sandwich panels ZIPS-Cinema/Module/Ultra and use of ‘floating’ type acoustical flooring throughout the area to increase the sound insulation of the surrounding structure.
  • Reduce noise levels in ventilated rooms by placing sound absorbing (acoustic) material on top of the sound insulation (second layer) in the ceiling and walls of ventilated rooms to reduce room reflections.
  • Facing air ducts with two layers of weighted GKL boxes to reduce the number of indirect sound transmission paths.

As an additional measure, we recommend using thick metal ducts with smooth transitions/bends/junctions. Less turbulence forms in them, and such air ducts are less of a source of noise.

Silence in adjoining rooms can be achieved by removing all rigid connections between equipment/communications and the building structure, increasing the sound insulation of walls and air ducts to the required level, and drowning out the room with sound absorbing material. increase.