https://dong2000.xyz/tags/fourier-transformation/ Recent content in Fourier Transformation on Sheng Dong's website https://dong2000.xyz/ptr.png https://dong2000.xyz/ptr.png Hugo -- gohugo.io en Sun, 16 Jul 2023 13:22:19 +0800 https://dong2000.xyz/post/tracking-noise/ Sun, 16 Jul 2023 13:22:19 +0800 https://dong2000.xyz/post/tracking-noise/ <p>Our bio lab is quite noisy because of a 24-7 working ventilation duct on the ceiling - the room needs to be kept under negative pressure. At some point the noise reached 80 dB, which is quite annoying.</p> <p>So here I am, trying to use my knowledge from environmental physics lessons to track the source of noise pollution.</p>