جستجوی مقالات مرتبط با کلیدواژه « روش لوله امپدانس » در نشریات گروه « مهندسی شیمی، نفت و پلیمر »

In today's advanced world, due to the expansion of industries and the use of machinery in factories, noise has become an inevitable part of life. This caused man to pay more attention to the sense of hearing and to study acoustics among the basic subjects. One of the methods to control noise pollution is the method of absorbing sound waves. In different acoustic designs, porous sound-absorbing materials have been considered. In this regard, textiles have been studied due to their ductility and Porosity. In this study, Warp Knitted Spacer Fabric(WKSF) was produced on a by double needle bar Rachel machine. Then, polyacrylonitrile (PAN) nanofibers were coated on (WKSF) by a single-nozzle electrospinning device with different electrospinning durations. The sound absorption of (WKSF) coated with PAN nanofibers was investigated by impedance tube method in the frequency band of 1000-5000 Hz. The experimental results showed that the coating of PAN nanofibers on (WKSF) increases the sound absorption coefficient at all frequencies.