Identification of uncertainty levels of acoustic properties of biocomposites under different mounting conditions in impedance tube tests [PDF]
Noise Control Engineering Journal, 2021 Impedance tube method is widely used to measure acoustic properties of materials. Although this method yields reliable acoustic properties for soft textured materials, uncertainty levels of measured acoustic properties for hard materials, including biocomposites, can be quite large, mainly due to uncertain mounting conditions.
Garip Genç +4 more
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A Preliminary Analysis of Tympanometric Parameters in a Local Multiethnic Population
Audiology Research, 2020 Background: Tympanometry is a routine clinical test ordered at the Department of Otolaryngology, Ear, Nose and Throat (ENT) at Changi General Hospital (CGH). In combination with the pure tone audiogram, tympanograms aid in the diagnostic value of various
Kenneth Wei De Chua
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Tympanometry and CT Measurement of Middle Ear Volumes in Patients with Unilateral Chronic Otitis Media [PDF]
Clinical and Experimental Otorhinolaryngology, 2008 ObjectivesThe goals of the study were to compare the middle ear (ME) volumes from both normal and lesioned ears, and these ME volumes were measured by a digital image processing computed tomography (CT) program in patients with unilateral chronic otitis ...
Jae-Yoon Ahn +7 more
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Panel of resonators with variable resonance frequency for noise control [PDF]
, 2012 The article focuses on acoustic resonators made of perforated sheets bonded onto honeycomb cavities. This kind of resonators can be used in adverse conditions such as high temperature, dirt and mechanical constraints. For all these reasons, they are, for
Cherrier, Olivier +2 more
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Multifrequency tympanometry in infants
International Archives of Otorhinolaryngology, 2012 Introduction: The use of conventional tympanometry is not sufficiently sensitive to detect all cases of middle ear changes, and this hinders accurate diagnosis.
Moraes, Tamyne Ferreira Duarte +2 more
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Enhancement in fire retardant Properties of Coconut Coir/Polyurethane acoustic composites
Journal of Natural Fibers, 2022 This study aims to enhance the flammability properties of coconut coir and polyurethane resin sound-absorbing material. Sound absorption properties of the material for normal sound incidence were measured using impedance tube setup up based on ISO 10534 ...
Nirmala H. Bhingare, S. Prakash
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Test of single degree of freedom acoustic treatment impedance models for multimodal acoustic propagation in duct with flow [PDF]
The Journal of the Acoustical Society of America, 2017 Passive acoustic treatments, also called liners, are the main solution to noise problems. The Single Degree Of Freedom (SDOF) acoustic treatment, composed of a thin material (perforated plate) affixed to air cavities with a rigid bottom, constitutes a solution.
Ryan, Baccouche +2 more
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Sound transmission testing of polymer compounds [PDF]
, 2012 This is the post-print version of the final paper published in Polymer Testing. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and ...
Ahmadnia, A +3 more
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Investigating the thermal stability of 1-3 piezoelectric composite transducers by varying the thermal conductivity and glass transition temperature of the polymeric filler material [PDF]
, 2002 The thermal behaviour of a number of 1-3 piezoelectric composite transducers is discussed. In particular, devices manufactured from a polymer filler with a relatively high glass to rubber transition temperature (T-g), and from polymer systems with ...
Benny, C.G. +6 more
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Modal analysis and nonlinear characterization of an airborne power ultrasonic transducer with rectangular plate radiator [PDF]
, 2018 Some industrial processes like particle agglomeration or food dehydration among others can be enhanced by the use of power ultrasonic technologies.
Acosta, V.M. +3 more
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