infrasound

American  

[in-fruh-sound] / ˈɪn frəˌsaʊnd /

noun

1. sound with frequencies below the audible range.

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infrasound British  

/ ˈɪnfrəˌsaʊnd, ˌɪnfrəˈsɒnɪk /

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

Etymology

Origin of infrasound

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

Example Sentences

See Examples For:

infrasound

"If we want to conduct a thorough assessment of low-frequency sounds and infrasound, we first need a better understanding of how sensory systems process low-frequency sound and infrasound," he said.

From Science Daily ● Jul. 19, 2026

When scientists examined whether people can perceive infrasound, they found that we are not consciously aware of it.

From Science Daily ● May 3, 2026

Despite these changes, they could not reliably tell whether infrasound had been playing.

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

These long-lasting seismic and infrasound signals are likely the result of vibrations caused by high-pressure gas venting rapidly from the pipeline into the water and atmosphere.

From Science Daily ● Jan. 3, 2024