| 单词 | infrasound |
| 释义 | infrasound[ in-fruh-sound ] / ˈɪn frəˌsaʊnd / nounsound with frequencies below the audible range. Origin of infrasoundFirst recorded in 1925–30; infra- + sound1 Words nearby infrasoundinfrared radiation, infrared star, infrared telescope, infrasonic, infrasonics, infrasound, infraspecific, infraspinatus, infraspinatus bursa, infraspinous fossa, infrastructure Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for infrasoundinfrasound / (ˈɪnfrəˌsaʊnd) / nounsoundlike waves having a frequency below the audible range, that is, below about 16Hz Derived forms of infrasoundinfrasonic (ˌɪnfrəˈsɒnɪk), adjectiveCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for infrasoundinfrasound [ 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. Other words from infrasoundinfrasonic adjectiveThe American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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