Sound and More Sound By Catherine Dorcinvil Introduction

Sound… and More Sound By: Catherine Dorcinvil

Introduction O In this power point you will learn O What sound is O Properties of sound O What is music O Using sound

What is Sound O Sound is compressional waves divided in two groups O The two groups are known as compressions and rarefactions. Molecules pushed together in the air Molecules spread apart in the are

Compression and Rarefaction O Compression and rarefactions travel differently through different Mediums wha e r sa m u i ve Med ds mo n sou gh u thro t

Q&A O Ever wonder why things sound different depending on the location? O Well this is because sound travels faster through different things!

Sound O Sound comes in different scales, Intensities, pitches and frequencies. Different scales Intensities Pitches • Loud • Soft • The amount of energy that flows through a specific area in a specific amount of time. • Pitch is how high or how low a sound is • Frequency is a measure of how many wavelengths pass a particular point each second Frequencies

Properties of Sound O Those four properties effect the way and what sound travels through. (frequency, pitch, Intensity, and different scales)

What does sound travel through? Medium Speed Air 347 Water 1, 498 Brick 3, 650 Aluminum 4, 877 As shown in the table above, sound travels the fastest through solids, next is liquid, and lastly gass.

Speed of sound and temperature O Sound moves differently through different temperatures O Hot- when hot is moves faster O Cold- When it is cold it moves slower

The effect of sound on the human ear O All these sounds, pitches, and frequencies are all useless without an ear to receive these sound …Good thing we all have our ears!

Human hearing O The human ear had four parts to them that makes us able to hear sounds. The outer the middle and the inner.

Here a few riddles! O Q: What did one ear say to the other? O Q: What kind of ears do engines have? O Answer 1: between me and you eye’s smell! O Answer 2: An Enginear!

Outer Ear O The outer ear gather the sound waves

Middle Ear O Middle ear converts the sound waves

Inner ear O Lastly the Inner ear amplifies the sound waves

Human hearing O A few things the ear is used for O Listen to lectures O Hear alarms O But most of all. . . Music!

What is music O Music is made of sounds used in a regular pattern O Some things that make up… O Natural Frequencies O Resonance

Natural Frequencies O Natural Frequencies – A particular frequency at which a material will vibrate. O NO matter what is done to the material the natural frequency stays the same.

Resonance O The quality in a sound of being deep, full, and reverberating.

Beats O Music is made of beats O Beats are pulsing vibrations. O Beats are used in the background of music sometimes to add effect.

Using sound O We use sound all the time. And everywhere we go. We use sound in different ways at different times

Ways we use sound Alarms Microwave Television Music