Abstract
In this research project, a passive method of using narrow side-branches has been used for improving the sound transmission loss along ventilation duct. A microphone was installed at the end of each side-branch. While 4 other microphones were installed in front of and at the back of the array. Four settings with different tube length arrangement had been compared. Two microphones transfer method was used in calculating the sound transmission loss. The result shows that this narrow side-branch array can produce a higher transmission loss within a relatively wide frequency range. The performance of the side-branch array can improve the effect of resonance across narrow side-branch arrays and hence broaden the resonance frequency band to maximize transmission loss.
Original language | English |
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Title of host publication | 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013 |
Subtitle of host publication | Noise Control for Quality of Life |
Publisher | OAL-Osterreichischer Arbeitsring fur Larmbekampfung |
Pages | 5811-5816 |
Number of pages | 6 |
Volume | 7 |
ISBN (Print) | 9781632662675 |
Publication status | Published - 1 Jan 2013 |
Event | 42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013 - Innsbruck, Austria Duration: 15 Sept 2013 → 18 Sept 2013 |
Conference
Conference | 42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013 |
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Country/Territory | Austria |
City | Innsbruck |
Period | 15/09/13 → 18/09/13 |
Keywords
- Control
- Duct noise
- Side-branch array
ASJC Scopus subject areas
- Acoustics and Ultrasonics