infrasonic

Adjective Satellite

having frequencies below those of audible sound

Adj

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

Origin / Etymology

From infra- + sonic.

Antonyms

ultrasonic

Scrabble Score: 15

infrasonic: valid Scrabble (US) TWL Word
infrasonic: valid Scrabble Word in Merriam-Webster MW Dictionary
infrasonic: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 18

infrasonic: valid Words With Friends Word