infrasonic
Too low-pitched
Infrasonic describes sound waves below the range of human hearing—typically under 20 hertz.
Elephants communicate infrasonically across miles; earthquakes and volcanic eruptions produce infrasonic rumbles detectable by specialized equipment.
The prefix infra- means below, contrasting with ultrasonic (above human hearing).
Infrasonic frequencies can cause unease without conscious awareness.
Frequency measurement unit
- wavelengthSpatial repetition interval
- acousticsStudy of sound transmission
- soundwaveTraveling pressure disturbance
- thresholdPoint of beginning
amplitude · oscillation · spectrum · pitch · low-frequency · bass · rumble · throb
Tusked gray giant
- whaleHuge sea mammal
- rhinocerosLarge horned African mammal
- giraffeTallest land animal
- okapiShort-necked giraffe relative
tiger · alligator · communication · rumble · long-distance · herd · vocalization · low-pitched
Seismic ground movement
- volcanoEarth's fiery vent
- tectonicsStudy of crustal deformation
- seismographEarthquake measuring device
- tremorInvoluntary rhythmic shaking
avalanche · landslide · P-waves · magnitude · epicenter · geophysics · precursor · geological
Loss of spatial awareness
- uneaseMild persistent worry
- anxietyPersistent apprehensive distress
- nauseaPre-vomiting stomach discomfort
- fatigueWeariness from prolonged exertion
vibration · physiological · discomfort · dread · haunted · pressure · chest · fear
Ongoing observation of something
- sensorsDevices that detect input
- hydrophoneSubmersible sound sensor
- geophoneGround vibration detector
- spectrogramFrequency-over-time display
waveform · transducer · signal · analysis · microphone · array · recording · measurement
hertz
Frequency measurement unit
- wavelengthSpatial repetition interval
- acousticsStudy of sound transmission
- soundwaveTraveling pressure disturbance
threshold · amplitude · oscillation · spectrum · pitch · low-frequency · bass · rumble · throb · hum
elephant
Tusked gray giant
- whaleHuge sea mammal
- rhinocerosLarge horned African mammal
- giraffeTallest land animal
okapi · tiger · alligator · communication · rumble · long-distance · herd · vocalization · low-pitched · inaudible
earthquake
Seismic ground movement
- volcanoEarth's fiery vent
- tectonicsStudy of crustal deformation
- seismographEarthquake measuring device
tremor · avalanche · landslide · P-waves · magnitude · epicenter · geophysics · precursor · geological · eruption
disorientation
Loss of spatial awareness
- uneaseMild persistent worry
- anxietyPersistent apprehensive distress
- nauseaPre-vomiting stomach discomfort
fatigue · vibration · physiological · discomfort · dread · haunted · pressure · chest · fear · subliminal
monitoring
Ongoing observation of something
- sensorsDevices that detect input
- hydrophoneSubmersible sound sensor
- geophoneGround vibration detector
spectrogram · waveform · transducer · signal · analysis · microphone · array · recording · measurement · instrumentation
weather
Atmospheric state outdoors
- stormSevere atmospheric disturbance
- tornadoViolent rotating windstorm
- hurricaneViolent tropical windstorm
thunder · meteor · wind · turbulence · lightning
- soundsound, sound waves, echoes, acoustics, vibrations
- acousticssound waves, sound wave, sound, soundwave, vibration
- hearingear, cochlea, hearing loss, deaf, hearing test
infrasonicultrasonic
Above audible frequency range
high-frequency · ultrasound · supersonic · high-pitched · treble
infrasonicaudible
Capable of being detected by ear
hearable · sonic · perceptible · acoustic
ultrasound, sonorous, resonance, sonic, sonar, supersonic, ultrasonic, infrasound, subsonic