The Fourier (Blog) Series Part 1 – Introducing The DFT

The FFT is one of the backbones of signal processing, allowing us to quickly transform a signal from time-domain to frequency-domain (and vice-versa via the inverse FFT). This allows us to analyze or manipulate the signal such as filtering, noise reduction, pitch detection or correction, time-stretching or even removing elements from the signal. The FFT

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It’s Not a Hoverboard, but Ultrasonic 3D Levitation is Very Cool!

Researchers at University of Tokyo, Nagoya Institute of Technology, University of Tokyo and Sony CSL have demonstrated their technique for manipulating small objects in three dimensions using standing waves created by an ultrasonic phased array.     Acoustic levitation is not a new phenomenon. The technique uses the principle of standing waves to keep a

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