In reality, it is common that the loss factor has some frequency dependency. In a frequency-response analysis, this can be readily incorporated by making the loss factor a function of the built-in variablefreq. You can either use an expression, as shown below, or reference any type of func...
The MEMS microphone model includes a description of the electrical, mechanical, and acoustical properties of the transducer. The acoustic description includes thermal and viscous losses explicitly solving the linearized continuity, Navier-Stokes, and energy equations, that is,thermoacoustics. The mechanics ...
Uniaxial response ranging from compression to tension. The scale on thex-axis is logarithmic. Note that operating conditions of rubber parts, such as seals, are often under predominantly compressive states. If the data sets used for parameter fitting contain only tension data, this may be a ...
for example, be highly reverberant in a frequency band that is important for speech. The room could also have a strong modal behavior (standing waves) at certain critical frequencies that are easily excited. These are things you want to avoid and be able to predict when designing a room....
The plot below depicts the fitted data against the measured data. Equal weights are assigned to both the uniaxial and equibiaxial least-squares fitting. It is clear that the Neo-Hookean material model with only one parameter is not a good fit here, as the test data is nonlinear and has on...
density depends on the mean free acoustic path and thus on the room geometry. Absorption may be applied at walls and a transmission loss may be applied when coupling rooms. Increased diffusion due to room fitting can be added. Material properties and sources may be specified in frequency bands...
fitting a theoretical model to an impedance boundary condition. The Helmholtz resonator has a moving acoustic mass (the air in the neck), a compliance (the compressible air in the resonator volume), and losses (the thermoviscous losses). Thus, a good model across the entire frequency range ...
function is done by estimating the values for the coefficients used in the function, essentially fitting a parameterized analytic function to a collection of data. By fitting a curve to a set of data points, we can interpolate values from the function to areas where data isn’t explicitly ...
Fitting Measured Data to Different Hyperelastic Material Models Yield Surfaces and Plastic Flow Rules in Geomechanics Computing Stiffness of Linear Elastic Structures: Part 1 Computing Stiffness of Linear Elastic Structures: Part 2 Editors note: From version 5.4, the settings for mixed formulations look ...
density depends on the mean free acoustic path and thus on the room geometry. Absorption may be applied at walls and a transmission loss may be applied when coupling rooms. Increased diffusion due to room fitting can be added. Material properties and sources may be specified in frequency bands...