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  • Sound | Properties, Types, Facts | Britannica
    With passage of the compressions and rarefactions that constitute the sound wave, there would occur a fluctuation above and below atmospheric pressure The magnitude of this fluctuation from equilibrium is known as the amplitude of the sound wave; measured in pascals, or newtons per square metre, it is represented by the letter A
  • sound - Kids | Britannica Kids | Homework Help
    Every sound has three basic properties: pitch, intensity, and quality The pitch of a sound is how high or low it is Faster vibrations cause sounds with a higher pitch The intensity of sound is how loud or soft it is Intensity depends on the strength of the vibrations Stronger vibrations cause louder sounds
  • Wave | Behavior, Definition, Types | Britannica
    Waves come in two kinds, longitudinal and transverse Transverse waves are like those on water, with the surface going up and down, and longitudinal waves are like of those of sound, consisting of alternating compressions and rarefactions in a medium
  • Wave motion | Definition, Examples, Types, Facts | Britannica
    wave motion, propagation of disturbances—that is, deviations from a state of rest or equilibrium—from place to place in a regular and organized way Most familiar are surface waves on water, but both sound and light travel as wavelike disturbances, and the motion of all subatomic particles exhibits wavelike properties
  • Acoustics | Definition, Physics, Facts | Britannica
    Acoustics, the science concerned with the production, control, transmission, reception, and effects of sound Beginning with its origins in the study of mechanical vibrations and the radiation of these vibrations through mechanical waves, acoustics has had important applications in almost every area of life
  • sound - Students | Britannica Kids | Homework Help
    There must be a vibrating source to set up sound waves, a medium (such as air) to carry the waves, and a receiver to detect them Sound waves cannot travel through a vacuum There is an age-old question concerning the definition of sound
  • Acoustics - Early Experimentation | Britannica
    The modern study of waves and acoustics is said to have originated with Galileo Galilei (1564–1642), who elevated to the level of science the study of vibrations and the correlation between pitch and frequency of the sound source His interest in sound was inspired in part by his father, who was a mathematician, musician, and composer of some
  • Properties of sound | Britannica
    sound, Mechanical disturbance that propagates as a longitudinal wave through a solid, liquid, or gas A sound wave is generated by a vibrating object The vibrations cause alternating compressions (regions of crowding) and rarefactions (regions of scarcity) in the particles of the medium
  • Musical sound - Movement, Frequency, Pitch | Britannica
    Sound waves move as a succession of compressions through the air The wavelength is determined by frequency; the higher the pitch, the shorter the wavelength A pitch of 263 cycles per second (middle C of the piano) is borne as a wavelength of around 4 3 feet (speed of sound ÷ frequency = wavelength)
  • Human ear - Sound Waves, Outer Middle Ear | Britannica
    Human ear - Sound Waves, Outer Middle Ear: The outer ear directs sound waves from the external environment to the tympanic membrane The auricle, the visible portion of the outer ear, collects sound waves and, with the concha, the cavity at the entrance to the external auditory canal, helps to funnel sound into the canal





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