infrasonic

American  

[in-fruh-son-ik] / ˌɪn frəˈsɒn ɪk /

adjective

1. noting or pertaining to a sound wave with a frequency below the audio-frequency range.

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Etymology

Origin of infrasonic

First recorded in 1925–30; infra- + sonic

Example Sentences

Elephants can speak to each other using infrasonic rumbles — sounds that humans are incapable of hearing — that travel long distances and warn other nearby elephants of potential danger.

From Los Angeles Times

One of the most striking features of the Nord Stream events is its long-lasting seismic and infrasonic signals, the researchers found.

From Science Daily

Etna's explosions generate "infrasonic waves" that the human ear does not pick up because of their low sound frequency, but the glass in the windows does.

From BBC

The study offers few clues about how terns might do this, but other research suggests some migrating birds detect infrasonic weather signals or observe changing clouds.

From Scientific American

His own experiments showed that two minipigs weren’t put off their cracked corn during stints in a chamber resonating with infrasonic waves.

From The Verge