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
core +1 more source
Journal of the Acoustical Society of America, 2021 Measurements of acoustic properties of sound absorbing materials in impedance tubes show poor reproducibility, which was demonstrated in round robin tests.
M. Stender +4 more
semanticscholar +1 more source
The potential of date palm midribs-based fabric acoustic panels for sustainable interior design
Ain Shams Engineering Journal, 2023 This paper presents an experimental study of acoustic absorption of novel fabric acoustic panels utilizing non-woven fabric cores and fabric facings made of date palm midribs-fibers; to be used as absorbent panels for spaces with privacy needs.
E.A. Darwish, Mohamad Midani
doaj +1 more source
The impact of regular diving on the condition of the middle ear
International Journal of Occupational Medicine and Environmental Health, 2021 Objectives It is generally held that exposure to both high-pressure and long-lasting contact with water makes diving a potentially hazardous sports activity as far as the ears are concerned.
Olgierd Stieler +6 more
doaj +1 more source
Clinical evaluation of Eustachian tube transience and function in patients with different types of increased nasal resistance [PDF]
Vojnosanitetski Pregled, 2009 Background/Aim. Eustachian tube is a connection between throat and the middle ear. Inflammatory processes and malformations of nasal cavity could lead to dysfunction of the whole upper respiratory tract, this emphasizing the evaluation of the Eustachian ...
Andrić-Filipović Snežana +3 more
doaj +1 more source
Data-driven acoustic impedance inversion with reweighted L1 norm sparsity constraint
Frontiers in Earth Science, 2023 Acoustic impedance (AI) inversion is widely used in geophysics and reservoir prediction. But the traditional impedance inversion method cannot fully exploit the sparse characteristics of geological attributes. There are problems with multiplicity and low
Lian Zhao +7 more
doaj +1 more source
Experimental investigation of inter-element isolation in a medical array transducer at various manufacturing stages [PDF]
, 2016 This work presents the experimental investigation of vibration maps of a linear array transducer with 192 piezoelements by means of a laser Doppler vibrometer at various manufacturing finishing steps in air and in water.
Bini, Fabiano +2 more
core +1 more source
Can Wideband Absorbance Be Used in the Detection of Ossicular Chain Defects [PDF]
Iranian Journal of Otorhinolaryngology, 2022 Introduction:We aimed to compare the effectiveness of wideband absorbance in detecting ossicular chain discontinuity with intraoperative findings.Materials and Methods:In this study, 58 ears from 38 patients with chronic otitis media (COM) were included.
Fulya Turanoglu +3 more
doaj +1 more source
Effect of Plastic Fibers on Properties of Foamed Concrete [PDF]
Engineering and Technology Journal, 2013 The main objective of this work is to study the effect of adding plastic fibers on Lightweight Aggregate Foamed Concrete (LWAFC) using mix proportion of 1:2.6:0.4 by volume (cement: fine Porcelanite: coarse Porcelanite) with 2% foaming agent by weight of
Hisham K. Ahmed +2 more
doaj +1 more source
Medidas de reflectância acústica na otosclerose: estudo de caso
Audiology: Communication Research, 2014 O objetivo deste trabalho foi analisar as medidas de reflectância em uma paciente com otosclerose. A paciente, do gênero feminino, 51 anos, apresentava queixa de hipoacusia bilateral e a hipótese diagnóstica de otosclerose.
Letícia Cortez Neto +3 more
doaj +1 more source