Michael Wirtzfeld (@MichaelRW)
Two questions:1.) If you have an existing GRAS microphone, do you have a respective calibration device like the B&K Type 4231 Handheld calibrator?2.) The...
Can you elaborate on those niches? I've seen them used in biosignal analysis (i.e. EEG), but there are likely more points of application.
Nice. Thank you. I've been contemplating getting a SDR kit for a while. This will definitely help me make a decision.
I think you've inadvertently quartered the original sample rate instead of using half the original sample rate of 44.8 kHz.
Consider this example,
close all; clear;...
Replacing the text signal with sinusoid confirms the approach. In using the "symmetric" argument in the IFFT function, conjugate symmetry is ensured in the IFFT...
Richard,I'd suggest stepping through the CWT function in Matlab using the debug options. Since you are using this function now, understanding its functionality could...
Okay, very good. A different formulation that I haven't seen: variance in place of inner-product of tap input vector.
At first glance it appears your "function [y,snr_dB,P_ey_dB] = funzione1(B,A,x,e)" does work properly. I added a statement at the beginning of this function that...
Filtering a signal, whether it is done in the frequency domain or the time domain, will change the signal. How the signal will change (i.e. phase shift, distortion...
Hello,If Matlab is available to you, you may want to explore the Mustafa and Bruce (2006) formant tracker.The estimated pitch is 150 Hz, which agrees with your...
Hello,I don't think I fully understand the question. Having said that the only thing I can suggest, having read Rick's post, is applying the set of 201 filters...
I think all the information is stated in the question. Consider,close all; clear; clc;
set(0, 'DefaultFigureWindowStyle', 'docked');
sampleRate_meters=1;
d_meters=0:1:199;
a=exp(-sampleRate_meters/20);
b=1-a;...
Hi,I ran your code and found a couple of things I changed to generate a better frequency domain estimate of the SNR.For the computation of the DFT, I divided the...
You know the intervals, or periods, between each set of impulses. Take the inverse of these values to get the corresponding frequencies. Generating a histogram...
Matlab and Excel are very common tools. I would think a lot of people on this site have used them or their equivalents.Post your questions...
For your information, to half-wave rectify a digital signal replace negative samples by zero and keep the positive samples.The cut-off frequency of the lowpass filter...
If you want to extract the envelope of a WAV-file, there are many ways to do this. I suggest you try half-wave rectification followed by lowpass filtering.
There are numerous methods available in Matlab. Try a basic Google search like "Matlab psd" to start and go from there.
You are welcome. If you have any questions, please let me know.I am interested in seeing how your project progresses.Michael.
Hi,You have a long road ahead of you if you are attempting to implement the recurrent neural network (RNN) in the white-paper you cited in your original post. ...
Resaech EMS methods. I found this readily IS2018Supp.pdfGiven the link to the Python library, you need Python code?
Re: Why am I getting the same frequency response plots when one has aliasing and the other does not?
Everything is correct. As achesir and pomartel have described, aliasing is occurring for frequencies larger than the Nyquist frequency. In your example the sample...
I think the value for Omega_s is not correct. The value that I get is 0.07121. Since the "b0", "b1", "a0", and "a1" coefficients are computed using Omega_s then...
Hello,With the nonlinear response of typical electrical-to-acoustic transducers, what methods are available to characterize their nonlinear behaviour to test signals...
Hello, Mr. Westcott:Your comments are extremely interesting? Could you please elaborate on them? In particular the ideas of "decorating a transfer function"...
Hello,You've likely already found the issue with your script-file, but the third argument to the "bilinear" function should be "Fs" not "1/Fs". With this change...
One more item, if you do not have access to Matlab, Octave is an great alternative. See "https://www.gnu.org/software/octave/".
Hello,The effective duration of the signal before and after decimation is unchanged. The original signal, "s", is 1 second in duration (i.e. see the "netTime"...
Hello,Although I don't work with multirate filters on a daily basis, I think I can provide you with some insight on what is going on here.In order to apply a 512-point...
By "visual fashion" I am going to assume you are talking about images. If that is indeed the context, then I suggest the article "Image Quality Assessment: From...
On the face of it, don't these operations just perform a 2-dimensional FFT with different frequency resolutions in each dimension?
So, the two signals (red and blue curves) shown in the figures produced by your script-file will always have the same general shape and offset value (6, in this...
Hello,I would try both approaches and see if there is a performance difference using the same type of classifier.First, train the classifier using the 183 MFCC feature...
It looks like you've taken into account the change in sign necessary to change the maximization problem into a minimization problem that is suitable for the FMINCON...
Out of curiosity, how do you know the answer is wrong? Please discuss your rationale for reaching this conclusion.
This idea reminds me of the stories about the "hackers" that are able to hack and control cars like the Toyota Prius. One of the facts that these sensational...
Are your two sinusoidal signals just tones, or combined with other signal?It would be helpful if you could make them available or Matlab code that generates examples...
In this particular example, the person is working in real-world units (as indicated in Tim's response below) to define the parameters of the lowpass filter. The...
What do you mean by "generating the burst of sine wave"? If you are using a sinusoidal input that is "turned on" at time zero, the filter's response will consist...
Like bhoward, I have also struggled with the task of including Matlab generated figures in a LaTeX document. To be frank with you, I would stay away from tools...
Two things that are helpful to do in order to include a Matlab generated figure into a LaTeX document is to set the size of the figure and to increase the size of...
It looks like you may need to think about the LMS parameters and perhaps its implementation. You have indicated there are constraints to your problem, but based...
Good morning,I think this is a somewhat common ailment of most technical articles today. Non-technical articles too. I get the sense that the authors have...
The other aspect of the problem that we might be over looking is the number of weights you are using in your LMS adaptive filter. Typically, adaptive filters use...
By only "upsampling and interpolating" the input signal (i.e. the signal to be filtered) and not the desired signal, are you expecting the same 'delta' channel response?...
Hello,I think you need to provide additional information before we can get a handle on your question.First of all your figure has no legend. What are the frequencies...
As @DaniloDara has said, no specific algorithm is necessary to accomplish this task. However, you will need to write some code that will transfer the digital...
Hello, André:I would suggest that you approach this project in two steps.First, write code that will get the DSP board to act "transparently." This means the...
Hello,I agree with Mike. Start with 2D cases and work your way to 3D. Although I've done a bit of work using FFTs, it's been primarily with speech signals. Adding extra...
I am more familiar with Matlab than Octave. However, it does look like Octave supports the "freqz" function, which appears to be what you want based on your...
Hi,
Although this is not my area of expertise, I will wade into the discussion.
Based on the datasheet and what I have read here gearslutz_link_1of2 and here gearslutz_link_2of2,...
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