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  1. Journal of the Brazilian Society of Mechanical Sciences and Engineering
  2. Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38
  3. Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 4, April 2016
  4. Structural feedback analysis of a hearing aid using finite element and lumped parameters methods
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Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 40
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 39
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 8, December 2016
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 7, October 2016
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 5, June 2016
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 4, April 2016
An aerodynamic optimization computational framework using genetic algorithms
Structural feedback analysis of a hearing aid using finite element and lumped parameters methods
Combustion study of reactivity-controlled compression ignition (RCCI) for the mixture of diesel fuel and ethanol in a rapid compression machine
Aeroelastic analysis of wings with isotropic and orthotropic materials in compressible flow
Analysis of the acoustical behavior of cavities using impedance functions
Experimental investigation of linear and nonlinear aeroelastic behavior of a cropped delta wing with store in low subsonic flow
Vibration control of a flexible structure with electromagnetic actuators
Movable-bed coupled analysis model of overtopping failure of concrete face sandy gravel dam
Magnetohydrodynamic (MHD) stagnation point flow of nanofluid past a stretching sheet with convective boundary condition
Steady state of ion transport in homopolar ion-exchange membrane: a theoretical study
Non-uniform magnetic field effect on nanofluid hydrothermal treatment considering Brownian motion and thermophoresis effects
Flow-induced vibration of a circular cylinder in cross-flow at moderate Reynolds number
Thermal analysis of laser beam welding of nickel-based super alloy Inconel 625 to AISI 316L, using Gaussian optics theory in keyhole
Influence of thermal conductivity and thermal stability on the fade and recovery characteristics of non-asbestos semi-metallic disc brake pad
Multi-objective optimization of laser curve cutting of aluminium metal matrix composites using desirability function approach
An integrity analysis approach for development wells
Rework solution method on large size radial roller bearings
Evaluation of recycling of polycarbonate sheets used in ballistic glass packages
Sustainable freshwater from the tropical oceans
MHD flow and heat transfer of Sisko fluid over a radially stretching sheet with convective boundary conditions
Finite element investigation of inertia and viscous effects on regularized Herschel–Bulkley flows
A novel software for design and optimization of hybrid power systems
Estimation of elastic moduli of particulate-reinforced composites using finite element and modified Halpin–Tsai models
Radiative heat transfer considering the effect of multiple reflections in greenhouse structures
Reiterated homogenization applied to heat conduction in heterogeneous media with multiple spatial scales and perfect thermal contact between the phases
Principal component analysis for reservoir uncertainty reduction
Erratum to: Static analysis of variable thickness two-directional functionally graded annular sector plates fully or partially resting on elastic foundations by the GDQ method
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 3, March 2016
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 2, February 2016
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 38, Issue 1, January 2016
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 37
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 36
Journal of the Brazilian Society of Mechanical Sciences and Engineering : Volume 35

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Structural feedback analysis of a hearing aid using finite element and lumped parameters methods

Content Provider SpringerLink
Author Jordan, Roberto Barbosa, Leandro Rodrigues Cordioli, Júlio A.
Copyright Year 2015
Abstract Hearing aids are designed to overcome hearing losses suffered by some individuals and operated by measuring and amplifying the acoustic field at certain frequency depending on the user hearing loss. In many cases, its transducers (microphone and loudspeaker) are near located, and a feedback signal phenomenon may occur, either through structural or airborne transmission. The structural feedback is characterized by a vibrational response at the microphone position produced by the loudspeaker, also called receiver, that result in a unwanted signal due to the microphone vibration sensitivity. If not properly controlled, the feedback signal builds up, resulting in a loud whistle at the user ear causing great discomfort. The objective of this work is to analyse the structural feedback mechanism at a behind-the-ear hearing aid, and proposed a numerical approach that allows the consideration of the phenomena during the design phase of such systems. A numerical model, based on the finite element method (FEM) and the lumped parameters method, was used to analyse and quantify the problem. While the hearing aid case was modelled using FEM, the receiver and its suspensions were represented by means of a single degree-of-freedom or a multiple degree-of-freedom systems. The procedures used to define material properties and dynamic parameters are presented and discussed. Experimental tests are used to validate the models separately and to determine vibration levels imposed at the microphone location during the hearing aid operation, which are used to verify the overall accuracy of the numerical model. Finally, a sensitivity analysis is performed, indicating some design options that can be used to minimize the structural feedback problem in hearing aids.
Starting Page 1059
Ending Page 1071
Page Count 13
File Format PDF
ISSN 16785878
Journal Journal of the Brazilian Society of Mechanical Sciences and Engineering
Volume Number 38
Issue Number 4
e-ISSN 18063691
Language English
Publisher Springer Berlin Heidelberg
Publisher Date 2015-06-07
Publisher Place Berlin, Heidelberg
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Finite element method Vibration Feedback Mechanical Engineering Hearing aid
Content Type Text
Resource Type Article
Subject Applied Mathematics Industrial and Manufacturing Engineering Automotive Engineering Mechanical Engineering Aerospace Engineering
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