{"published":"2026-02-21 17:10:52","author_url":"https://blog.hatena.ne.jp/chaos_kiyono/","blog_url":"https://chaos-r.hatenadiary.jp/","blog_title":"Ken-Chaos\u2019s Random Notes on R","url":"https://chaos-r.hatenadiary.jp/entry/2026/02/21/171052","categories":["Fundamentals of Digital Filters","FIR filter"],"width":"100%","provider_url":"https://hatena.blog","type":"rich","title":"Let\u2019s Get a Bird\u2019s-Eye View of the FIR Filter World","description":"A Finite Impulse Response filter, or FIR filter, is a digital filter whose response to an input (its impulse response) has a finite length and becomes exactly zero after a certain time. To build intuition, imagine striking a bell. The strike is the input, and the ringing that follows is the response\u2026","author_name":"chaos_kiyono","height":"190","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchaos-r.hatenadiary.jp%2Fentry%2F2026%2F02%2F21%2F171052\" title=\"Let\u2019s Get a Bird\u2019s-Eye View of the FIR Filter World - Ken-Chaos\u2019s Random Notes on R\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/c/chaos_kiyono/20251121/20251121201809.png","version":"1.0"}