infrasound

[ in-fruh-sound ]

/ ˈɪn frəˌsaʊnd /

noun

sound with frequencies below the audible range.

Nearby words

infrared radiation, infrared star, infrared telescope, infrasonic, infrasonics, infrasound, infraspecific, infraspinatus bursa, infrastructure, infratemporal crest, infratemporal fossa

Origin of infrasound

First recorded in 1925–30; infra- + sound¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for infrasound

infrasound

/ (ˈɪnfrəˌsaʊnd) /

noun

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

Derived Formsinfrasonic (ˌɪnfrəˈsɒnɪk), adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for infrasound

infrasound

[ ĭn′frə-sound′ ]

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. See Note at ultrasound.

Related formsinfrasonic adjective