Abstract
Technical rooms of the construction units with noise generating technical objects inside require the use acoustic boards. To provide more effective dissipation of low-frequency sound energy, the acoustic boards made of porous sound-absorbing structures are used; and volume structural composition of these boards can contain hollow resonator elements. They can be represented as Helmholtz acoustic resonator (RIII), half wave (RII), and quarter wave (RI) acoustic resonators. Their distinctive feature is that their chamber, tube and throat parts can be made of non-air-blown sound transparent elastic membrane. Such types of modified acoustic boards are mounted on wall structures of technical rooms with set slotted air gaps between their opposite end faces; and open throat parts of acoustic resonators RIII,RII, and RI are on end faces of acoustic panels. Quoted results of experimental researches prove the effectiveness of using the offered technical method to modify acoustic boards.
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