Use line enclosures, barriers, and screens with sound absorbers on the noisy side. They work by blocking sound, either partially (barriers) or fully (enclosures), between the source and the receiver. Enclosures are generally more effective at reducing noise emissions than. Our sound enclosure is more than just a technical device that does a quite good job. It is intended for use in sensitive environments. The acoustic efectiveness in practice. Sound enclosure test room values validation in real. Industrial noise control follows a fundamental hierarchy that mirrors occupational health practice: eliminate or reduce the hazard at source; if that is not feasible, control the transmission path; if that is not feasible, protect the receiver. Each step down the hierarchy is more expensive per dB. ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). Each member body interested in a subject for which a technical. Specially designed for Sky Air and VRV heat pumps Factory tested and guaranteed data for capacity, efficiency and sound (according to ISO 3744) Minimal capacity reduction No additional calculations needed thanks to factory tested data, reducing design workload You want to finish your work faster?The following are some best practices for using sound absorbing materials: Use line enclosures, barriers, and screens with sound absorbers on the noisy side.