🔊 By the end of this lesson, you’ll be able to:

• Understand how sound waves are created:
  • Sound originates from vibrating objects, which disturb surrounding particles
  • These disturbances travel as longitudinal waves through solids, liquids, or gases
  • Learn how compression and rarefaction form the wave pattern that carries sound
• Explore key characteristics of sound waves:
  • Amplitude – relates to the wave’s energy and determines loudness
  • Frequency – the number of wave cycles per second, measured in hertz (Hz); determines pitch
  • Wavelength – the distance between successive compressions or rarefactions
  • Understand how these properties affect how we perceive different sounds
• Discover how the human ear perceives sound:

• • Sound waves enter the outer ear and travel through the ear canal
  • Vibrations strike the eardrum, which transmits them via tiny bones in the middle ear
  • The inner ear (cochlea) converts these vibrations into electrical signals
  • Signals are sent to the brain, where they’re interpreted as speech, music, or noise