Sound

• The voice box or Larynx makes you speak. It is a small hallow tube located at the top of your windpipe or trachea attached to the bone that is connected to your tongue.
• The study of sound is called acoustics.
• The reflected sound is called an echo.
• Sounds are vibrations that travel through a medium and can be heard when it reaches the ear.
• The inner ear helps you hear and balance.
• The middle ear is the part of the ear that contains the eardrum and the ossicles.
• The Eardrum vibrates when sound waves reach it, transmits vibrations to the middle ear bones.
• The outer ear is composed of pinna and ear canal.
• The pinna helps determine the direction where the sound comes from.
• Sound travels fastest in what medium?

  Solids
• The auditory nerve in your brain interprets the electrical signals as sound.
• What does SONAR stand for?

  Sound Navigation and Ranging
• Lithotripsy is a treatment typically using ultrasound shock waves to treat kidney stones.
• Alexander Graham Bell made the unit for sound that is commonly known as Decibels. (dB)