infrasound
noun
infrasound is a noun meaning “Sound waves having a frequency below the human audible range (below about 20 Hz)” (English Wiktionary, September 2026). It is spelled I-N-F-R-A-S-O-U-N-D, and it appears about once in every 10 million words in written English (wordfreq, 2021 data). The plural of infrasound is infrasounds.
What does infrasound mean?
noun
- 1
Sound waves having a frequency below the human audible range (below about 20 Hz).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of infrasound
- infrasounds plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is infrasound?
Infrasound appears about once in every 10 million words in written English, the 95,993rd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Infrasound in Spanish, French, German and Portuguese
In the sense low-frequency sound waves:
| Language | Words |
|---|---|
| French | infrason, infra-son |
| German | Infraschall |
| Spanish | infrasonido |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does infrasound come from?
From infra- + sound.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).