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  1. Good morning everyone!!! We are the group 2 Presented by : Group 2
  2. Good day friends today we will discuss Sound Wave. LET'S START EVERYONE!!! Frianca
  3. What is sound waves? A sound wave is the pattern of disturbance caused by the movements of energy traveling through a medium ( such as air, water or any other liquid or solid matter) as it propagates away from the source of the sound. Sound waves are created by the objects vibration and produce preassure waves like a ringing phone. Frianca
  4. What are sound waves called? Sound wave is called longitudinal wave because it is produced by compressions and rarefactions in the air. The air particles vibrate parallel to the direction propagation. Franz
  5. What are sound waves used for? Sound is an actual physical wave,we can manipulate it to do something other than keep us entertained during our work commute. It is also been used to treat medical cinditions, clean, generate electricity and make one of a kind artwork. Franz
  6. What is the importance of sound? Sound is a crucial aspect of our everyday lives. Just think about it - most of us communicate verbally, and it's pretty hard to understand body language alone. This makes sound the primary source of information. Kim
  7. What are the characteristics of a sound waves? Sound wave can be describe to five characteristics and this are : wavelength, amplitude, timeperiod, frequency and velocity or speed. Kim
  8. Whay frequency is sound waves? The units of frequency are called hertz or Hz. Humans with normal hearing can hear sounds between 20hz and 20,000hz. Frequencies above 20,000hz are known as ultrasound. Julianne
  9. What affects the speed of sound? The speed of sound in a medium is determined by combination of the medium's rigidity ( or compressibility in gasses) and it's density. The more rigid ( or less compressibile) the medium, the faster the speed of the sound . The greater the density of a medium, the slower the speed of the sound. Julianne
  10. How fast can a sound travel? On a standard day at a sea level static conditions, the speed of a sound js about 760mph or 1000 feet/second. Rashard
  11. Can sound travel in the water? While sound moves at a much faster speed in the water than in air, the distance that sound waves travel is primarily dependent upon ocean temperature and pressure. Rashard
  12. Where is sound faster? Solids Sound travels fastest through solids. This is beacause molecules in a solid medium are much closer together than these in a liquid or gas allowing fact ,sound waves travel over 17 times faster through steel than through air. Joel
  13. Why can't we hear underwater? It's because the water is denser than air , since sound waves travel faster underwater than in air , it is much harder for us to detect where they are coming from . Our bodies have something called bone conductivity. Rhian lei
  14. Does wind carry sound? Changing wind speeds above the ground cause sound waves to bend toward or way on earth. Carl nathan
  15. Can sound travel in empty space? Sound can't be carried in the empty vacuum of space cause sound waves need a medium to vibrate through such as air and water. Wayne
  16. Is sound louder in air or water? Sound travels in water very fast compared with air cause water particles are packed in more densely. Manny
  17. How does the sound made? Sound is created by a vibrating objects, the compression and expansion of the air on either side of the vibrating membrane produces differences in air pressure. Brian
  18. Book summary Reflection of sound, echo is a property of sound wave. Once a echo occurs, it only meansbthat the sound produced has bounced back . Refraction of sound, refraction occurs when a wave travels from a dense to a less dense media. Sound travels faster in cool air than warm air because cool air is denser than warm air. Diffraction of sound , diffraction occurs can be easily observe by looking in the opening or size of the obstacle, if the sound wave is bolcked, Frianca
  19. Continuation : That sound wave will look for a new path . If the sound wave is blocked with a small opening , the sound will pass through the opening and spread again. Characteristics of sound . There are three characteristics of sound pitch, loudness, and quality . Pitch refers to higness and lowness of a sound. Loudness of sound produced by vibrating object depends in intensity of force that makes the object vibrate. Aaron
  20. Continuation : The quality of sound ( or the timbre) sets the difference of one tone from another . Speed of Sound , the speed of sound depends on the medium the wave pass through it's speed at sea level 344m/s yet this may vary if affected by some factors. Detecting sounds, when sound hits an object , it can cause the object to vibrate Rashard
  21. This are some of examples that produces sounds. Frenz
  22. That's all for our discussion!! That ends our discussion about Sound waves
  23. Friends, have you listened to our discussion? Well then let's test you're skills.
  24. Quiz 1 : 1.
  25. Quiz 2 :
  26. Group 2 members: Leader: Frianca Sec: Franz Other members: Aaron Rashard Julianne Manny Carl nathan Wayne Joel Rhian lei Brian Frenz
  27. Thanks for listening to our presentation Again we are group 2