Sounds in Nature

Describe Sounds in Nature

• Sound is variations in vibrations and pressure.
• Increase and decrease of pressure changed the sounds we hear

Birds Using Sound in Nature

• Birds use different frequencies and different pitches that mean different things.
• Using air sacs in their heads they can produce any frequencies they want (like most mammals)

Frogs Using Sound in Nature

• Frogs don't use sound to communicate, but more to locate. Using long deep repetitive calls, frogs can locate themselves, and locate their mate easily
• Frogs way of communicating can be heard (by other frogs) underwater, on land, and through substances.

Dolphins Using Sounds in Nature

• Dolphins don't communicate with a universal language. Each dolphin has its own "language".
• A mother dolphin will call to her calf for days so the calf gets accustomed to its mothers "language"
• Each dolphin pod has their own slang and use air sacs in their head to communicate and make different pitches, much like birds.

Natural Frequencies in Nature

• Different animals make different noises at different frequencies.
• How different animals communicate depends on the frequency and pitch.

Factors that Affect Sound in Nature

• Man made noises and machines often affect the transmission of sound by disrupting it making it hard for animals to communicate.

Sounds Underwater .vs. Sound on Land

• There aren't many differences in sounds on land and underwater, sound does however travel faster underwater rather than on land.
• Sound travels faster in denser mediums (water)

Amplitude

• Amplitude is showing how tall the wave is, the taller the wave the louder the sound.

Intensity

• Some animals emit more intense sounds, animals often in crisis use a more intense frequency to communicate warning.

References

• http://hyperphysics.phy-astr.gsu.edu
• http://www.physicsclassroom.com
• http://www.dosits.org/