This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Window function flat top. Window function and frequency response SRS flat top flattop window and frequency response own Bob original version Olli Niemitalo Window function and frequency response SRS flat top Octave commands File Windowfunction rectangular Octavecommands Window function Images with Matlab source code