Acoustics

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Word Menu > Science and Technology > The Sciences > Physics > Acoustics

acoustics - science of the production, effects, and transmission of sound
anechoic - (adj) completely absorbing sound waves, therefore free from echoes
audio frequency - band of audible sound frequencies between 15 hertz and 20,000 hertz
audiogram - graph of hearing loss in ear as measured by audiometer
audiometer - device used to measure sharpness and range of hearing
aural - (adj) received through or relating to the sense of hearing
consonance - complex sound wave perceived as harmonious chord
decibel - unit of sound intensity level, one decibel being the smallest change of sound intensity perceptible to human ear
dissonance - sound waves perceived as inharmonious noise
echo - rebound of sound wave from impenetrable surface that results in repetition of sound
fundamental - lowest frequency of sound produced by an instrument or other tone source
harmonics - fundamental tone and tones whose frequencies are whole number multiples of the fundamental
octave - interval between given tone and one with double or half its frequency
overtones - sound waves of higher frequency than the fundamental, expressed in integral multiples only
pitch - perceived tonal characteristic that is equivalent to frequency
resonance - production of abnormally large vibration in response to external stimulus, occurring when stimulus frequency is at natural vibration frequency of system
sonic - (adj) having to do with sound waves; equal to or being speed of sound in air
sonic boom - shock wave associated with object moving through fluid or gas at speed greater than that of sound
sound wave - longitudinal disturbance in matter that is audible to human ear; similar disturbance that exists above and below audible range
sound intensity - rate at which sound energy flows through given unit area
speed of sound - approximately 741 miles per hour in air at sea level
subsonic - (adj) less than speed of sound
supersonic - (adj) greater than speed of sound
threshold frequency - lowest sound intensity audible to average human ear
timbre - quality of sound
ultrasound - sound with frequency over 20,000 hertz, beyond upper limit of human hearing
white noise - blend of all audible frequencies distributed equally over range of frequency band