Cover Image

Experimental and numerical analyses of wind-induced noise in two-way radios

The generation of wind noise of entrance microphone cavities owing to turbulent airflow is an inherent problem with radio telecommunication systems, such as two-way radios. It will lead to a pressure fluctuation which is highly unpleasant and would degrade a two-way radio communication. This researc...

Full description

Saved in:
Bibliographic Details
Main Authors: Wan Masrurah Hairudin,, Ummi Masyitah Mohd Fisol,, Norilmi Amilia Ismail,
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2021
Online Access:http://journalarticle.ukm.my/17808/1/11.pdf
http://journalarticle.ukm.my/17808/
https://www.ukm.my/jkukm/volume-332-2021/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-ukm.journal.17808
record_format eprints
spelling my-ukm.journal.178082022-01-02T07:39:32Z http://journalarticle.ukm.my/17808/ Experimental and numerical analyses of wind-induced noise in two-way radios Wan Masrurah Hairudin, Ummi Masyitah Mohd Fisol, Norilmi Amilia Ismail, The generation of wind noise of entrance microphone cavities owing to turbulent airflow is an inherent problem with radio telecommunication systems, such as two-way radios. It will lead to a pressure fluctuation which is highly unpleasant and would degrade a two-way radio communication. This research aims to understand the relationship between noise level and the flow structure of the different parameters to the occurrence of noise during communication using a two-way radio device. A noise measurement is conducted to analyse the sound pressure level (SPL) within a cavity, in which computational fluid dynamic(CFD) is used to investigate the flow behaviour on the various effects of cavity positions at P1, P2, P3, P4, and P5 and wind velocities of 0.75 m/s, 1.49 m/s, 2.24 m/s, 2.99 m/s and 3.75 m/s which corresponding to Reynolds number (Re) of 8694, 17389, 26083, 34777, and 43471 respectively. CFD result showed the presence of separation of the shear layer, the development of vortex shedding, the recirculation region and vorticity were present inside the edges of the cavity. SPL increased with an increase in wind velocity and, the cavity distance of P4. In the cavity position of P5, SPL is decreased due to the wind velocity exceeding the maximum level of a wind tunnel. Therefore, the cavity position of P5 is suitable for reducing wind noise. These parameters are significant for improving the design of two-way radio to reduce the noise during outdoor communication. Penerbit Universiti Kebangsaan Malaysia 2021 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/17808/1/11.pdf Wan Masrurah Hairudin, and Ummi Masyitah Mohd Fisol, and Norilmi Amilia Ismail, (2021) Experimental and numerical analyses of wind-induced noise in two-way radios. Jurnal Kejuruteraan, 33 (2). pp. 257-264. ISSN 0128-0198 https://www.ukm.my/jkukm/volume-332-2021/
institution Universiti Kebangsaan Malaysia
building Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description The generation of wind noise of entrance microphone cavities owing to turbulent airflow is an inherent problem with radio telecommunication systems, such as two-way radios. It will lead to a pressure fluctuation which is highly unpleasant and would degrade a two-way radio communication. This research aims to understand the relationship between noise level and the flow structure of the different parameters to the occurrence of noise during communication using a two-way radio device. A noise measurement is conducted to analyse the sound pressure level (SPL) within a cavity, in which computational fluid dynamic(CFD) is used to investigate the flow behaviour on the various effects of cavity positions at P1, P2, P3, P4, and P5 and wind velocities of 0.75 m/s, 1.49 m/s, 2.24 m/s, 2.99 m/s and 3.75 m/s which corresponding to Reynolds number (Re) of 8694, 17389, 26083, 34777, and 43471 respectively. CFD result showed the presence of separation of the shear layer, the development of vortex shedding, the recirculation region and vorticity were present inside the edges of the cavity. SPL increased with an increase in wind velocity and, the cavity distance of P4. In the cavity position of P5, SPL is decreased due to the wind velocity exceeding the maximum level of a wind tunnel. Therefore, the cavity position of P5 is suitable for reducing wind noise. These parameters are significant for improving the design of two-way radio to reduce the noise during outdoor communication.
format Article
author Wan Masrurah Hairudin,
Ummi Masyitah Mohd Fisol,
Norilmi Amilia Ismail,
spellingShingle Wan Masrurah Hairudin,
Ummi Masyitah Mohd Fisol,
Norilmi Amilia Ismail,
Experimental and numerical analyses of wind-induced noise in two-way radios
author_facet Wan Masrurah Hairudin,
Ummi Masyitah Mohd Fisol,
Norilmi Amilia Ismail,
author_sort Wan Masrurah Hairudin,
title Experimental and numerical analyses of wind-induced noise in two-way radios
title_short Experimental and numerical analyses of wind-induced noise in two-way radios
title_full Experimental and numerical analyses of wind-induced noise in two-way radios
title_fullStr Experimental and numerical analyses of wind-induced noise in two-way radios
title_full_unstemmed Experimental and numerical analyses of wind-induced noise in two-way radios
title_sort experimental and numerical analyses of wind-induced noise in two-way radios
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2021
url http://journalarticle.ukm.my/17808/1/11.pdf
http://journalarticle.ukm.my/17808/
https://www.ukm.my/jkukm/volume-332-2021/
_version_ 1720981057505853440
score 13.211869

Similar Items