# infrasound

> English word · Noun · frequency rank #96,083

## Definitions
1. Sound waves having a frequency below the human audible range (below about 20 Hz).

## Etymology
From infra- + sound.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/infrasound