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Broadband Noise Source Location in Turbomachinery using a Conditioned Spectral Analysis Technique Coupled with Modal Decomposition
(2010)
Methods are presented for the identification, viz., relative magnitude and spatial origin, of broadband and tonal noise sources within aeroengines. The methods require dynamic pressure measurements from sensors located ...
Fan-noise reduction of data centre telecommunications' server racks, with an acoustic metamaterial broadband, low-frequency sound-absorbing liner
(2023)
An acoustic metamaterial is evaluated successfully as a means to reduce axial fan noise in an IT server rack application. The continuing growth in demand for cloud-based memory storage is outpacing sustainable energy ...
Noise Source Location in Turbomachinery Using Coherence Based Modal Decomposition (AIAA 2009-3367)
(2009)
Coherence based source analysis techniques can be used to identify the contribution of
turbomachinery core noise sources to pressure measurements in the far-field. The usual
approach is to locate a measurement sensor ...
Environmental noise mapping using measurements in transit
(2010)
Due to the ever increasing level of environmental noise that the EU population is exposed to, all countries
are directed to disseminate community noise level exposures to the public in accordance with EU
Directive ...
Technique to Analyze Characteristics of Turbomachinery Broadband Noise Sources (AIAA 2010-3979)
(2010)
In this paper an experimental technique for the decomposition of broadband ducted
sound fields into their mode constituents is applied to two laboratory scale experimental
setups. The broadband mode analysis technique ...
To Design a Designer To Design Designs
(Trinity Centre for Bioengineering, Trinity College Dublin, 2008)
This paper reports on the implementation of a new project based
design course at first year level of an engineering degree programme. The
project, carried out in groups of six, uses the design and construction of ...
Noise Source Identification For Ducted Fan Systems (AIAA 2007-3693)
(2007)
Understanding combustion noise source mechanisms, designing efficient acoustic liners
and optimising active control algorithms for noise reduction requires the identification of
the frequency and modal content of the ...