inaudible
Too quiet to catch
Inaudible means too quiet to be heard.
A sound may be inaudible because it's faint, because background noise drowns it out, or because it falls outside the range of human hearing: She muttered something inaudible.
The dog whistle is inaudible to humans.
The opposite is audible.
Weak and indistinct
gentle · whispered · murmured · sotto voce · muted · diminished · weakened · distant
Producing no sound
- soundlessProducing no audible noise
- noiselessProducing no sound
- voicelessHaving no voice
- speechlessUnable to talk
wordless · still · quiet · silence · muteness · unspoken · unuttered · unsounded
Made quieter, less distinct
- garbledConfused and unintelligible
- indistinctUnclear, hard to perceive
- unintelligibleImpossible to understand
- smotheredDeprived of air
drowned out · buried · stifled · suppressed · masked · obscured · deadened · dampened
Above audible frequency range
- infrasonicBelow audible frequency range
- subsonicBelow sound's speed
- frequencyRate of recurrence
- decibelTenth of a bel
threshold · soundproof · out of range · hertz · pitch · amplitude · sound waves
faint
Weak and indistinct
subdued · gentle · whispered · murmured · sotto voce · muted · diminished · weakened · distant · imperceptible
silent
Producing no sound
speechless · wordless · still · quiet · silence · muteness · unspoken · unuttered · unsounded · total silence
muffled
Made quieter, less distinct
- garbledConfused and unintelligible
- indistinctUnclear, hard to perceive
- unintelligibleImpossible to understand
smothered · drowned out · buried · stifled · suppressed · masked · obscured · deadened · dampened · thick
ultrasonic
Above audible frequency range
- infrasonicBelow audible frequency range
- subsonicBelow sound's speed
- frequencyRate of recurrence
decibel · threshold · soundproof · out of range · hertz · pitch · amplitude · sound waves
- hearingear, cochlea, hearing loss, deaf, hearing test
- quiet wordswhisper, murmur, shh, muted, muffled
- silencequiet, silent, mute, hush, stillness
- volumecubic meters, bulk, cubic feet, quantity, cubic inches
- drowned outmuffled, overpowered, blotted out, covered up, deadened
- soundsound, sound waves, echoes, acoustics, vibrations