> ELI5: poles and zeros in analog filters A filter decides which sounds (frequencies) get through β€” and which don't. ALL SOUNDS (all frequencies) FILTER ZERO POLE OUTPUT clean signal βœ“ Think of a filter like a bouncer at a party πŸŽ‰ β€” some sounds get in, some don't. πŸ“ Where do poles & zeros live? β€” The "S-Plane" (a map of frequencies) real imag The S-Plane: every spot = a frequency behavior zero Γ— pole Γ— left side = stable 🚫 ZERO blocks a frequency πŸ”Š POLE boosts a frequency ZERO = a frequency the filter completely silences Like a wall blocking a door πŸšͺ POLE = a frequency the filter really amplifies Like a megaphone for one sound πŸ“’ POLES + ZEROS together shape which sounds get loud or quiet = the filter's "personality" πŸŽ›οΈ eli5.cc

ELI5: poles and zeros in analog filters

medium confidence
March 30, 2026
// explanation
// eli5Imagine a filter is like a bouncy ball in a box. Poles are like walls that make the ball bounce around like crazy at certain frequencies - they boost or ring at those speeds [3]. Zeros are like holes in the box that swallow the ball - they kill certain frequencies so they disappear [2]. Engineers draw these on a special map to show how the filter will behave, kind of like marking where the bouncy spots and dead zones are [3].

// sources

[1]transfer function - Digital filters with more zeros than poles

Mar 1, 2014 ... So H(s)=1/s is considered to have one pole and no zeros. Digital filters designed by bilinear transform from analog filters always have the sameΒ ...

[2]Filter Basics 9: An Introduction to Poles and Zeros

Sep 14, 2022 ... Poles and zeros are properties of the transfer function, and in general, solutions that make the function tend to zero are called, well, zeros.

[3]A Filter Primer | Analog Devices

Sep 18, 2002 ... A pole-zero diagram of an RLC lowpass filter. The poles occur at s values for which the denominator becomes zero; that is, when s2 + sω0 ...

[4]What are poles in filters? : r/synthesizers - Reddit

Apr 6, 2019 ... ... pole analog filter made famous by. youtube. 21. 8. How to implement IIR filter with variable but continuous poles and zeros Β· r/DSP. β€’ 3y agoΒ ...

[5]CHAPTER 8 ANALOG FILTERS

A high-pass notch filter occurs when the zero frequency is less than the pole frequency. In this case Ο‰z lies inside the curve of the pole frequencies. WhatΒ ...

[6]Poles and Zeros in Analogue LTI Systemsvideo

Video by Adam Noel

Poles and Zeros in Analogue LTI Systems
[7]Zeros and Poles of a Transfer Functionvideo

Video by Neso Academy

Zeros and Poles of a Transfer Function
[8]Filtering 101: Single Pole Filtersvideo

Video by Analog Devices, Inc.

Filtering 101: Single Pole Filters

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