Gabriel Peyré on Twitter: "The spectrogram (aka short time Fourier transform) reveals the geometry of sounds. Evolving harmonics of a birds singing become smooth curves. Sounds are intrinsically (at least) 2-D (time -frequency).
![Short-Time Fourier Transform with the Window Size Fixed in the Frequency Domain (STFT-FD): Implementation - ScienceDirect Short-Time Fourier Transform with the Window Size Fixed in the Frequency Domain (STFT-FD): Implementation - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S2352711017300638-gr1.jpg)
Short-Time Fourier Transform with the Window Size Fixed in the Frequency Domain (STFT-FD): Implementation - ScienceDirect
![Example of TF analysis in short time window applied to EEG data. (A)... | Download Scientific Diagram Example of TF analysis in short time window applied to EEG data. (A)... | Download Scientific Diagram](https://www.researchgate.net/publication/322788218/figure/fig1/AS:588341745569792@1517283011329/Example-of-TF-analysis-in-short-time-window-applied-to-EEG-data-A-Mean-event-related.png)
Example of TF analysis in short time window applied to EEG data. (A)... | Download Scientific Diagram
![Applied Sciences | Free Full-Text | Area-Efficient Short-Time Fourier Transform Processor for Time–Frequency Analysis of Non-Stationary Signals Applied Sciences | Free Full-Text | Area-Efficient Short-Time Fourier Transform Processor for Time–Frequency Analysis of Non-Stationary Signals](https://pub.mdpi-res.com/applsci/applsci-10-07208/article_deploy/html/images/applsci-10-07208-g001.png?1607060093)
Applied Sciences | Free Full-Text | Area-Efficient Short-Time Fourier Transform Processor for Time–Frequency Analysis of Non-Stationary Signals
![Launch Window Soon, almost There, in Short Time - a Clock Symbolizes a Reminder that Launch Window is Near, Will Happen and Finish Stock Illustration - Illustration of phrase, english: 164305308 Launch Window Soon, almost There, in Short Time - a Clock Symbolizes a Reminder that Launch Window is Near, Will Happen and Finish Stock Illustration - Illustration of phrase, english: 164305308](https://thumbs.dreamstime.com/z/launch-window-soon-there-short-time-clock-symbolizes-reminder-near-will-happen-finish-quickly-little-164305308.jpg)
Launch Window Soon, almost There, in Short Time - a Clock Symbolizes a Reminder that Launch Window is Near, Will Happen and Finish Stock Illustration - Illustration of phrase, english: 164305308
![Inverse Short Time Fourier Transform algorithm described in words - Signal Processing Stack Exchange Inverse Short Time Fourier Transform algorithm described in words - Signal Processing Stack Exchange](https://i.stack.imgur.com/lMjJ5.png)