LOW-NOISE TECHNICAL ROOM Russian patent published in 2020 - IPC G10K11/00 E04B1/84 G10K11/02 

FIELD: construction.

SUBSTANCE: technical device is presented in the form of low-noise technical room equipped with mounted with air gaps between opposite end faces (γ) and relatively opposite mounting surfaces of wall and ceiling enclosing structures (k) of the technical room, separated by integral moulded composite sound-absorbing panels made of a porous air-defrosting sound-absorbing structure of the substance, lined with a sound-transparent layer of material, and integrated in it cavitary frequency-tuned noise-cancelling structural elements, presented in the form of low-frequency acoustic resonators Helmholtz R^III. Cavities of throat and chamber parts of Helmholtz R^III acoustic resonators are formed by bearing inner air-proof film elastic soundproof shell. Throat portion of the Helmholtz R ^III acoustic resonators can also be made from a solid air-insulated sound-insulating polymer material structure in the form of a hollow tubular element. Throat parts of the Helmholtz R^III acoustic resonators are placed on end faces of separate shaped-piece combined sound-absorbing panels. Technical device of low-noise technical room is endowed with broadband frequency composition sound absorption due to use of porous air-borne sound-absorbing structures of structural materials. At the same time, the high-frequency selective low-frequency suppression of sound energy is carried out on the discrete values of the dominant functional frequencies of sound radiation f_ms of the noise generating technical equipment, which are mounted in the technical room, which are released in the sound spectrum, which is realized using low-frequency acoustic resonators of Helmholtz R^III_ms. Similarly, selective frequency-tuned effect of acoustic absorption of acoustic resonators of Helmholtz R^III extends to suppression of arising resonant amplification of sound radiation by excited own acoustic modes of mass-elastic body of air volume of internal three-dimensional cavity of technical room, characterized by frequencies of acoustic oscillations f_mA and lengths of sound waves λ_mA , using corresponding low-frequency acoustic resonators of Helmholtz R^III_mA.

EFFECT: low-noise technical room is disclosed.

8 cl, 31 dwg