THE WORLD OF SOUND BY:CHRTISTINA JOSEPH

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

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

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

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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