Low Cost Journal,International Peer Reviewed and Refereed Journals,Fast Paper Publication approved journal IJEDR(ISSN 2321-9939) apply for ugc care approved journal, UGC Approved Journal, ugc approved journal, ugc approved list of journal, ugc care journal, care journal, UGC-CARE list, New UGC-CARE Reference List, UGC CARE Journals, ugc care list of journal, ugc care list 2020, ugc care approved journal, ugc care list 2020, new ugc approved journal in 2020, Low cost research journal, Online international research journal, Peer-reviewed, and Refereed Journals, scholarly journals, impact factor 7.37 (Calculate by google scholar and Semantic Scholar | AI-Powered Research Tool)
INTERNATIONAL JOURNAL OF ENGINEERING DEVELOPMENT AND RESEARCH
(International Peer Reviewed,Refereed, Indexed, Citation Open Access Journal)
ISSN: 2321-9939 | ESTD Year: 2013

Current Issue

Call For Papers
July 2022

Volume 10 | Issue 3
Last Date : 29 July 2022
Review Results: Within 12-20 Days

For Authors

Archives

Indexing Partner

Research Area

LICENSE

Paper Details
Paper Title
Sound Attenuation for HVAC Ducts Using Porous Absorbers of Different Sound Absorption Coefficient
Authors
  Sachin S. Gurav,  Sachin S. Mestry

Abstract
Sound attenuation is done by active sound attenuator or by passive sound attenuator. In case of active sound attenuation the anti-noise source is used to reduce the intensity of noise however, in passive sound attenuation various types of sound absorbing porous materials are used to absorb sound energy. In passive sound attenuators the substantial portion of the mechanical pressure wave penetrates to the pores before encountering to the solid surface. Large number of interactions takes place and the energy is transferred to the solid structure through the frictional losses and the sound intensity is reduced. Passive sound attenuator is used in Heating Ventilation and Air Conditioning (HVAC) duct to reduce the sound produced by the blower. Two porous materials of different sound absorbing coefficients are used in the attenuator. This passive attenuator is specifically designed to study the effect at low sound frequency. Frequency of sound is measured with the help of Lab VIEW software. Intensity of sound is measured using digital decibel (dB) meter. To measure the pressure drop digital anemometer is used. Along with the combination of porous materials the effect of thickness of porous absorber and the angle of porous absorbers with the direction of air stream is studied.

Keywords- Sound Absorption Coefficient, Porous Materials, Low Frequency sound, blade pass frequency, HVAC sound attenuation and pressure drop.
Publication Details
Unique Identification Number - IJEDR1403064
Page Number(s) - 3207-3213
Pubished in - Volume 2 | Issue 3 | Sept 2014
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)
Cite this Article
  Sachin S. Gurav,  Sachin S. Mestry,   "Sound Attenuation for HVAC Ducts Using Porous Absorbers of Different Sound Absorption Coefficient", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.2, Issue 3, pp.3207-3213, Sept 2014, Available at :http://www.ijedr.org/papers/IJEDR1403064.pdf
Share This Article


Article Preview

ISSN Details




DOI Details



Providing A digital object identifier by DOI
How to get DOI?

For Reviewer /Referral (RMS)

Important Links

NEWS & Conference

Digital Library

Our Social Link

© Copyright 2022 IJEDR.ORG All rights reserved