infrasound

American  

[in-fruh-saund] / ˈɪn frəˌsaʊnd /

noun

1. sound with frequencies below the audible range.

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infrasound British  

/ ˈɪnfrəˌsaʊnd /

noun

1. soundlike waves having a frequency below the audible range, that is, below about 16Hz

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infrasound Scientific  

/ ĭn′frə-sound′ /

1. Sound whose wave frequency is too low (under 15–20 hertz) to be heard by humans. Some animals, such as elephants and whales, emit calls at infrasound frequencies.

2. See Note at ultrasound

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Other Word Forms

• infrasonic
  adjective

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Etymology

Origin of infrasound

First recorded in 1925–30; infra- + sound ¹

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Example Sentences

See Examples For:

infrasound

Participants who were exposed to infrasound showed higher levels of salivary cortisol.

From Science Daily ● May 3, 2026

After the session, participants described how they felt, rated the emotional tone of the music, and indicated whether they believed infrasound had been present.

From Science Daily ● May 3, 2026

"This study was in many ways a first step towards understanding the effects of infrasound on humans," cautioned Scatterty.

From Science Daily ● May 3, 2026

In an old building, there is a good chance that infrasound is present, particularly in basements where aging pipes and ventilation systems produce low-frequency vibrations.

From Science Daily ● May 3, 2026

Seismometers catch the tiniest of volcanic shudders while other sensors track infrasound, which are waves with a frequency too low for human hearing.

From Science Magazine ● May 27, 2024

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