Using a one-dimensional finite-element approximation of Webster's horn equation to estimate individual ear canal acoustic transfer from input impedances [PDF]
, 2023 In many applications, knowledge of the sound pressure transfer to the eardrum is important. The transfer is highly influenced by the shape of the ear canal and its acoustic properties, such as the acoustic impedance at the eardrum. Invasive procedures to measure the sound pressure at the eardrum are usually elaborate or costly. In this work, we propose
arxiv +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
Evaluation of a Variable-Impedance Ceramic Matrix Composite Acoustic Liner
, 2014 As a result of significant progress in the reduction of fan and jet noise, there is growing concern regarding core noise. One method for achieving core noise reduction is via the use of acoustic liners.
Michael G. Jones +3 more
semanticscholar +1 more source
Polymer Testing, 2022 The acoustic properties of sealing systems are essential for the noise control of new-generation vehicles and closure systems. Accurate characterization of the elastic elastomer properties is essential to perform acoustic analyses; however, this ...
Orçun Saf, Haluk Erol, Ali Erkin Kutlu
doaj
Real ear unaided gain and its relation with the equivalent volume of the external and middle ear
International Archives of Otorhinolaryngology, 2012 Introduction: Old age is associated with changes in the characteristics of the middle ear transmission system and in external ear resonance, and these carry implications for the hearing aid (HA) verification process for which targets and measures of the ...
Bastos, Bárbara Guimarães +2 more
doaj +3 more sources
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
Impedance of a sphere oscillating in an elastic medium with and without slip [PDF]
J. Acoust. Soc. Am. 119(4), 2062-2066, 2006., 2006 The dynamic impedance of a sphere oscillating in an elastic medium is considered. Oestreicher's formula for the impedance of a sphere bonded to the surrounding medium can be expressed simply in terms of three lumped impedances associated with the displaced mass and the longitudinal and transverse waves.
arxiv +1 more source
Bayesian parameter identification in impedance boundary conditions for Helmholtz problems [PDF]
, 2023 We consider the problem of identifying the acoustic impedance of a wall surface from noisy pressure measurements in a closed room using a Bayesian approach. The room acoustics is modeled by the interior Helmholtz equation with impedance boundary conditions.
arxiv +1 more source
Solving the acoustic VTI wave equation using physics-informed neural networks [PDF]
, 2020 Frequency-domain wavefield solutions corresponding to the anisotropic acoustic wave equations can be used to describe the anisotropic nature of the earth. To solve a frequency-domain wave equation, we often need to invert the impedance matrix. This results in a dramatic increase in computational cost as the model size increases.
arxiv +1 more source
Systematic profiling of cancer‐fibroblast interactions reveals drug combinations in ovarian cancer
Molecular Oncology, EarlyView.Fibroblasts, cells in the tumor environment, support ovarian cancer cell growth and alter morphology and drug response. We used fibroblast and cancer cell co‐culture models to test 528 drugs and discovered new drugs for combination treatment. We showed that adding Vorinostat or Birinapant to standard chemotherapy may improve drug response, suggesting ...
Greta Gudoityte +10 more
wiley +1 more source