adj ·Rare ·Advanced level

Definitions

Adjective

1. 1
   Having frequencies below the human audible range
2. 2
   Generating or employing such sound waves

Adjective

1. 1
   having frequencies below those of audible sound wordnet

Synonyms

All synonyms

inaudible

Antonyms

All antonyms

ultrasonic

Example

More examples

"Infrasonic waves have a frequency of less than 20Hz."

Etymology

From infra- + sonic.

Related phrases

sound wave

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.