---
title: "Lesson 6.5 - High-Pass Filter"
description: "The high-pass filter at 80 to 100 Hz removes the low-frequency rumble that builds up below the range of human voice. Air conditioner hum, traffic noise, microphone stand vibration, all sit below 100..."
url: https://thestreameragency.com/courses/stream-quality-system/lessons/quality-6-5-highpass/
date: 2026-05-07
modified: 2026-05-07
author: "The Streamer Agency"
type: lp_lesson
lang: en
---

# Lesson 6.5 - High-Pass Filter

The high-pass filter at 80 to 100 Hz removes the low-frequency rumble that builds up below the range of human voice. Air conditioner hum, traffic noise, microphone stand vibration, all sit below 100 Hz and contribute nothing to vocal clarity.

The implementation in OBS: add a High-Pass Filter (or "Noise Suppression with HPF" depending on OBS version) to your microphone source. Set the cutoff frequency to 80 to 100 Hz. The filter rolls off everything below that frequency cleanly.

The audible result: a tighter, cleaner microphone signal with no audible loss of vocal warmth. The frequencies you cut were not contributing to your voice, only to background noise.

The setting also reduces wind and breath plosives that pass through despite off-axis positioning. The combination of off-axis positioning, noise suppression, compressor, limiter, and high-pass filter delivers a stream audio signal that beats most podcast setups despite costing a fraction. Audio quality is the most underestimated stream-quality lever. Build the chain.