Modelling of sound reduction of sound insulating enclosure with recycled rubber covered walls

• DOI: 10.3846/enviro.2023.915
• Publication Date: 2023-10-25T13:43:38Z
• Authors: Tomas VILNIŠKIS; Tomas JANUŠEVIČIUS
• Keywords: Enclosure; Soundproofing; Sound transmission class; Louver; Acoustic impedance

The excessive noise of machines and devices could be reduced with the use acoustic enclosures. Additional requirement for enclosures: free air circulation through construction walls, which is important device ventilation. properties parts are essential to model their ability reduce noise. basic airborne sound insulation walls absorption used material should experimentally tested. In this article, reduction modelling enclosure recycled materials covered was presented. Sound pressure level modelled Odeon software. A 3D created that includes used. consist two different constructions. side roof were made from a single plasterboard rubber material. back front constructed as louver construction, plates mounted change tilt angle allows create an transparent construction. Acoustic tested in ways. 50 mm thick sample transmission loss parameters insulating measured impedance tube. results experimental test included model. represented decrease levels increasing distance on sides. Four enclosures (0°, 15°, 30°, 45°) modelled. Results presented 125–4000 Hz frequency range. According results, efficiency 45° tilted reach up 12 dB.