A filter is a system that is designed to remove some component or modify some characteristic of a signal.

Sinusoids, or sinusoidal signals, representing the cosine or sine signals/waves, are the most basic signals in the theory of signals and systems. This chapter introduces the basic sinusoid concepts and operations.

Spectrum, a graphic representation of the frequency components of a signal, is

a compact representation of the frequency contents of a signal that can be represented as a sum of sinusoid.

Sinusoids, or sinusoidal signals, representing the cosine or sine signals/waves, are the most basic signals in the theory of signals and systems. This chapter introduces the basic sinusoid concepts and operations.

Just got the TA position for the lecture Digital Audio Signal Processing. It is a class introducing the basic digital audio signal processing. Even so, I thought it better to prepare more for the lecture. So I decided to review the reference book DSP FIRST - A multimedia Approach during the break.

The contents in the book are well-structured and well-explained, and there is nothing tricky inside. All we need to do is to review and use it again and again to make it a solid in our mind. In the blogs, there is nothing else but a list of the key points presented in the book but hopefully, this could help me, and the one who read this, strengthen the understanding.

PS: The contents are based both on the first and the second editions of the book.

This is to show the way to calculate variable (e.g. pressure) fluctuation in Paraview.

I got suddenly confused about how the reflection coefficient is computed, and it took me a whole night to figure out my mistake.

For the lattice Boltzmann method, the descriptor has to be defined in advance. Here we briefly discuss the descriptor structure in Palabos.

3D printing is becoming more and more popular in a variety of areas and there are already many application in musical instruments. Here I will briefly talks about the main techniques and some of my preliminary attemps in printing a mouthpiece.