1. THE WORLD OF SOUND
BY:CHRTISTINA JOSEPH

2. Introduction you will learn about: Sound Human hearing Intensity
Loudness
Pitch
And more

3. What Is Sound Sound is a compression of waves
Sound is used in everyday things
I will show you different examples of everyday sound that is used

4. Human Hearing
Our ears and brain work together to turn the compressional waves caused by speech, music and etc. in to something that has meaning
There are three parts to the ear:
-The outer which gathers sound
-middle which amplifies
-Inner which coverts

5. Intensity
Is the amount of energy that flows through a certain area in a specific amount of time.
An example of intensity is when turn the volume down on your radio the energy begins to reduce
Also when your friend whisper a secret to you the sound waves they create have low intensity and does not travel far

6. Loudness Is the human perception of sound intensity
An example of loudness jet taking off
There is also a scale of loudness called decibel which measures the scale of sound.

7. Pitch Is how high or low a sound seems to be
Frequency is measured in hertz (Hz)
When a sound wave with high hits your ear many compression hit your ear drums

8. Doppler Effect
The change in pitch of wave frequency due to a moving wave source
A race car would be an example of a Doppler effect because as they begin to move it brings different pitch

9. Music Is made of sounds that a re deliberately used in regular pattern
For example if you are tapping your pencil on the desk with rhythmic pattern then you are making music

10. Sound Quality
It describes the differences among sounds of the same pitch and loudness
For example when you play a note on a flute and then you play the piano which in the same note of the flute and we all know they are different instrument even with our eyes closed because of its quality

11. Musical Instruments Is any device used to produce a musical sound
For example:
Violins
Cello
Oboes
Bassoons
Horns
Kettledrums

12. Strings
Example of string instruments are Electric guitars and an elegant harps
Each stringed instrument has a resonator
A resonator is a hallow chamber filled with air that amplifies sound when the air inside of it vibrates

13. Brass and Woodwinds
An example of brass and woodwind is horns, oboes, and flutes
Brass instruments contain mouth pieces which is the resonator in a brass instrument

14. Percussion
Examples of percussion instruments are bass drums, kettledrums, and etc.
When a drummer strikes the membrane of the drum, the membrane begins to vibrate and cause the air inside the resonator to vibrate

15. Beats Beats are variation in loudness
An example of this is when two instruments play at the same time the sound wave produced by each instrument beings to interfere

16. Acoustics Acoustics is the study of sound
An example is when you is when someone is talking in a microphone and you hear an echo that means the echoing is producing reflections of reverberation
Is also used when you go to an a concert and they put cloth around the auditorium it is to help reduce vibration

17. Echolocation
Echolocation is the process of locating objects by emitting sounds and interpreting the sound the sound waves that are reflected back
An example of this is a bat hearing a moth due to its frequency of sound
Also the same with dolphin and fishes

18. Sonar Sonar is underwater sound waves to detect objects
An example is when there is a shipwreck and the ship sinks underwater if another ship passing above that, the sunken ship is sending the ship above it sonar waves

19. Ultrasound in medicine
Usually ultrasonic waves to clean glass wear
Ultrasonic waves are also used to detect:
Pregnancy
Types of heart disease
Cancer

20. Ultra Imaging
It is used to produce images of internal structures just like X rays
Usually doctors use ultrasound to examine parts of the body such as:
Gallbladder
Spleen
Kidneys
Breast
Eyes

21. Conclusion
I hope you learned more about sounds and how it is used in everyday life and use it for future purposes
Remember ENJOY THE SOUND