2019-04-08T17:34:48+03:00[Europe/Moscow] en true Sound, Intensity, Amplitude, Frequency, Pitch, Speed of sound, Microphone, Oscilloscope, Cochlea, Auditory nerve, Decibel, Ultrasound, Echo, Echolocation, Longitudinal wave, Transverse wave flashcards
Sound

Sound

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  • Sound
    A wave of vibrating particles transferring energy to our ears
  • Intensity
    The loudness of a sound
  • Amplitude
    The size of a sound vibration (the bigger the amplitude the louder the sound)
  • Frequency
    The number of vibrations per second (measured in Hertz)
  • Pitch
    How high or low a note sounds (high pitch is caused by high frequency)
  • Speed of sound
    343 m/s in air
  • Microphone
    A machine that converts sound waves into changes in electrical current or voltage
  • Oscilloscope
    An instrument that shows a picture of sound waves on a screen
  • Cochlea
    Part of the ear that changes vibrations into electrical impulses
  • Auditory nerve
    The nerve that carries impulses from the ear to the brain
  • Decibel
    Unit for measuring the loudness of a sound
  • Ultrasound
    Sound waves with frequencies above 20,000 Hertz (the upper limit of human hearing)
  • Echo
    The reflection of sound
  • Echolocation
    Finding prey or obstacles by emitting sounds and listening for the echoes
  • Longitudinal wave
    A wave in which the vibrations (eg of particles) are in the same direction as the direction of the wave
  • Transverse wave
    A wave in which the vibrations (eg of particles) are at right angles to the direction of the wave