LOW-NOISE TECHNICAL ROOM Russian patent published in 2019 - IPC E04B1/82 G10K11/16 

FIELD: acoustics.

SUBSTANCE: invention relates to the field of the environment acoustic safety ensuring technical means, used for the noise emissions suppression (reduction) produced by industrial, technological and engineering equipment, presented, in particular, by the pumping, compressor stations, power plants (internal combustion engines, diesel generator sets), ventilation and air conditioning systems, electrical machines (electric motors, electrical transformers) mounted inside the noise-emitting (noise-active) technical premises (construction buildings). Technical device is presented in the form of low-noise technical room, equipped mounted with air gaps between the opposite end faces and relative to the opposed mounting surfaces of wall and ceiling enclosing structures of the technical room, separated by the all-molded combined sound-absorbing panels, made up of a porous air-blown crushed sound-absorbing structure of the substance, lined with the material sound-transparent layer and integrated therein cavernous frequency tuned noise-suppressing structural elements, presented in the form of low-frequency half-wave acoustic resonators R^II_ms. Half-wave acoustic resonators R^II_ms are formed by the bearing inner air-blowing film elastic sound-transparent shell, made in the form of the cavernous sound-transparent element curved hollow U-shaped tubular profile, its tubular part certain dimensions, with open neck parts, which may be overlapped by the material protective lining damping air-blowing layer. Low-noise technical room technical device is endowed with the broad-band by the frequency composition sound absorption effect, with the sound pressure reducing pronounced selective low-frequency effect on released in the sound spectrum sound radiation f_ms working dominant functional frequencies discrete values, of mounted therein noise-generating technical objects. Also, the frequency-tuned sound absorption effect of the used half-wave acoustic resonators R^II_mA can be extended to the resonant sound radiation suppression, excited by the technical room internal three-dimensional cavity air volume mass-elastic body own acoustic modes, characterized by the sound vibrations frequencies f_mA and sound wavelengths λ_mA.

EFFECT: invention allows to increase the environment acoustic safety by the used technical device sound-absorbing characteristics improvement.

18 cl, 44 dwg