Sound Waves power point · SlidesMania.pptx

sound waves ppt.

1. SOUND Prepared by: Karen Mae Castro

2. Objectives: Describe the characteristics of sound using the properties of waves Demonstrate the changes in the pitch and loudness of sound Explain the production of sounds in the human voice box Discuss how pitch, loudness, and quality of sound vary from one sound to another Describe how organisms produce, transmit, and receive sounds of various frequencies Create harmonious music using recyclable materials

3. Table of Contents: M ediums of Sound transmission How we hear sounds L esson 1: Transmission of Sounds L esson 2: Pr operties of Sound Pitch Doppler Effect Echolocation Loudness Quality Les son 3: Musical Instruments Stringed Instruments Wind Instruments Percussion Instruments

4. What is Sound Wave? Vibrations are back and forth motions that create sound. Sound wave is produced when an object vibrates rapidly in a medium like air.

5. Compressions - The close together part of the wave Rarefactions – the spread-out parts of a wave

6. In which media does sound travel fastest? In Solid? In Liquid? Or In Gas?

7. Sounds travel faster in solids than in liquids and faster in liquid than in gases. Sound travels better through high-density materials. The closer the molecules are together, the faster they can collide and transfer energy.

8. H earing and the Human Ea r The Outer Ear – it is a sound collector. It consists of the part that you can see and the ear canal. The visible part is shaped somewhat like a funnel. This shape helps the visible part to collect sound waves and direct them into the ear canal.

9. The Middle Ear – it is a sound amplifier. It consists of the ear drum and three tiny bones called hammer, the anvil, and the stirrup. Sound waves that pass through the ear canal cause the ear drum to vibrate. These vibrations are transmitted to the three small bones, which amplify the vibrations.

10. The Inner Ear – it contains the Cochlea. The cochlea is filled with fluid and is lined with tiny hair-like cells. Vibrations of the stirrup bone are transmitted to the hair cells. The movement of the hair cells produce signals that travel to your brain, where they are interpreted as sound.

11. Properties of Sound

12. P roperties of Sound Pitch description of how high or low the sound seems to happen Loudness How loud or soft a sound is perceived to be.

13. Clearly, animals know more than we think, and think a great deal more than we know. ― Irene M. Pepperberg

14. Pandas don’t hibernate. When winter approaches, they head lower down their mountain homes to warmer temperatures, where they continue to chomp away on bamboo!

15. Koalas are even more lazy than cats.

16. Cats love to sleep. A fifteen-year-old cat has probably spent ten years of its life sleeping. Also, cats use their whiskers as feelers to determine if a space is too small to squeeze through.

17. Some facts about my cats. Traveled by plane. Twice! Of my cats are adorable. 100% 25% 75% Are females.

18. Let’s review some facts. Elephants Koalas are even more lazy than cats. Dogs Elephants can sense storms. Cats Dogs can smell your feelings. Pandas Kangaroos Koalas Pandas don’t hibernate. There are more kangaroos than humans in Australia. Cats use their whiskers as feelers

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