Sound Study Guide
- Sound is energy produced created by vibrations.
- Sound cannot travel in a vacuum; it must travel
- Sound travels through matter in compression
- Each molecule of matter passes the vibrations on
to the next molecule.
- Sound travels through solids, liquids, and gases
- Sound travels fastest through solids because the
molecules in solids are close.
- Sound that is bounced off an object is reflected,
and this creates an echo
- A process for measuring ocean depth is sonar
- When sound waves are trapped or are not able to
travel any further, they are absorbed
- Sound waves that pass through a material are
- Close waves=high pitch
- Short pipe or tight strings on instruments=high
- Long pipe or loose strings on instruments=low
- Volume is measured in decibels
- Sound travels slower than light
- Resonance is when the air in a guitar starts to
vibrate along with the strings
- Two very special ways of making sounds are Morse
code and Sonar
1. Morse code is a code that uses short and long taps of
a metal transmitter to represent the letters of the alphabet. It is often used by large boats/ships
2. Sonar is a system that uses transmitted and reflected
sound waves to learn how far away an object is in the water. This is used by submarines. Bats also use sonar to find food.