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Jan 10, 2019Open Access
This paper mainly uses the MATLAB software to design IIR digital filter with the amplitude frequency characteristic method and zero-pole method, and then analyzes the effect of coefficient quantization and quantization effects in IIR digital filter arithmetic. It is that we can use the software to draw some pictures. These pictures can show coefficient sys ...
Sep 28, 2017Open Access
The present paper is devoted to the investigation of lossless transmission lines terminated by a nonlinear load with an interval of negative differential resistance and in series connected conductance. In contrast of almost all paper when i=f(u), here the case u=f(i) is considered. A general method of reducing the mixed problem to an initial value problem for neutral system on the boundary ...
Mar 30, 2017Open Access
The detection of speech endpoint is an important application for speech signal processing. Although there are variance methods, the endpoint can’t be detected accurately in low SNR (Signal to Noise Ratio). The paper pointes out an endpoint detection algorithm combining two methods together: the one is improved spectral subtraction based on multitaper spectral estimation, and the other is BARK subband variance in frequency domain. ...
Nov 07, 2016Open Access
We consider a model of self-oscillator with
distributed amplifying structure realized on a segment of lossy transmission
line. The distributed structure of tunnel diode type generates nonlinearity of
polynomial type in the hyperbolic transmission line system. The transmission line
is terminated by nonlinear reactive elements at both ends. This means that
using Kirchhoff’s law we obtain nonlinear boundary conditions. Then a mixed
p ...
Jul 28, 2014Open Access
Severe or profound deafness in hearing
impaired children, can curb their ability to speak due to the lack of auditory
feedback. There has been a considerable attempt in developing commercial speech
training aids for such children which give feedback of acoustic and
articulatory parameters. Speech training aids based on visual feedback of vocal
tract shape (VTS) are reported to be useful for the improvement in speech production.
Since realistic VTS estima ...
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