1. Using Sound By: Angelica Percy Dillon Lewis

2. Acoustics Echoing effect produced by reflection of sounds –Called reverberation Acoustics: the study of sound Soft porous materials reduce reverberation

3. Echolocation Process of locating objects by emitting sound And interpreting the reflected sound waves

4. Steps to Echolocation Bat sends out ultrasonic cries When one hits a moth it bounces back Bat interprets Reflected sound waves Bat catches it’s prey

5. Sonar System of reflection to find underwater objects 1.Pulse is emitted downward in ocean 2.The sound wave hits something 3.Sound wave travels back to boat 4.Hydrophone picks up signal

6. Ultrasound in Medicine High frequency sound waves can be used in medicine Can be used to detect –Pregnancy –Types of heart disease –Cancer Can also treat –Gallstones –Kidney Stones

7. RESOURCES http://facstaff.bloomu.edu/ckepler/ultrasound%20of%20new%20baby.jpg http://marine.usgs.gov/fact-sheets/michigan/sonar.gif http://www.drfeatherortho.com/Graphics/echolocation.gif http://www.eparks.org/images/bat-echolocation-nps-lake-mead.jpg http://www.npsp.sa.gov.au/webdata/resources/images/NorwoodConcert Hall_copy.jpg http://wilk4.com/misc/f18.jpg http://www.fs.fed.us/r8/caribbean/wildlife-facts/2007/wildlife- facts_images_2007/2-brazilian_free-tailed_bat.jpg