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1. Sound

2. To scientist a falling tree makes sounds even
though we cant here it.
Almost anything you do can make sound
waves
Sound can travel threw many common things
such as desk, walls, floors and many others

3. Interactions of sound waves
Interactions of sound is just how sound interacts with
stuff. Like sound bouncing off a wall.
Reflection is like an echo when your in the shower the
sound bounces of the wall and comes back at you.
Diffraction is when you can hear something not in front
of you like a friend walking by the door talking.
Interference is when sound waves meet. The can meet
and disappear or one can over come the other.

4. The speed of sound can travel very fast. When it goes threw glass it
travels the fastest when it goes threw air (0°C) its the slowest.
Elasticity is very common for everyone. Its is as simple as
stretching a rubber band and letting it go.
Density is the weight of any and every thing. sound has to have
density to travel. No density it will float forever. To much it will fall.
Tempetuer has a great deal to do with sound to. If its really cold
sound travels slow. If its hot they travel fastser.

5. Loudness is important cause if your to loud its bad to low can
be bad to.
Energy of a sound source basically the more energy the
louder the sound.
Distance from a sound source if you are 10 feet away from a
speaker its louder to you then someone 20 feet away.
Measuring loudness is easy they are measured in decibel
some are higher than others.

6. Pitch is another property of sound. The pitch of sound is a
description of high and low.
pitch and frequency sound waves that have high frequency
have high pitch.
Changing pitch is an important property of music. If you cant
change in the middle of a note it might not sound good.

7. The Doppler effect is when something gets close it gets loud
when it gets farther away it gets quiet.
What causes the Doppler effect is easy when a sound
source moves the frequency of the waves changes because
the motion of the source adds to the motion of the waves.
What cause shock waves is at high speed the Doppler
effect can be spectacular.

8. Sound quality of musical instruments results from blending a
fundamental tone with its overtones. Resonance also plays a role in
the sound quality.
Fundamental tones and overtones. The lowest natural frequency of
an object are called Fundamental tones. The objects higher natural
frequencies are called over tones.
Resonance affects the sound quality of a musical instruments by
increasing the loudness of certain overtones.

9. Groups of musical instruments. There are
three basic groups of musical
instruments: stringed instruments, wind
instruments, and percussion instruments.
Stringed instruments have strings
Wind instruments you have to blow into
Percussion instruments are drums

10. Acoustics are
used in the
design of concert
halls to control
reverberation
and interference.

11. The human ear.
Outer ear funnels sound waves
The middle ear transmits the waves inward
The inner ear converts sound waves into a form that
travels to your brain

12. Hearing loss is exposure to loud sound s and
aging.
Causes of hearing loss can come from almost
anything that is to loud
Hearing aids can amplify sound going into the
ear.

13. Some animals including bats and dolphins use
echolocation to navigate and to find food.
Bats are one of the main animals who use this
so it can catch and eat food
Dolphins porpoises and whales us this also to
catch food and communicate even though they
have eyes

14. Ultrasound technologies such as sonar and
imaging are used to observe things that
cannot be seen
Sonar is used to find objects like a sunken
boat
Ultrasounds are mostly used on pregnant girls
hahaha this is the way they see what babies
look like

15.  Microphone
1. The microphone converts acoustic sound energy into electrical energy.
Some hearing aids use two microphones to help separate background
noise.
2. Processor
3. The processor digitizes the acoustic sound, then separates background
noise from speech. Both are processed to make speech clearer and to
reduce the interference of background noise.
4. Amplifier
5. The amplifier boosts the processed signal according to the pattern and
severity of your hearing loss, as well as the amount of background
noise.
6. Speaker
7. The speaker converts the electrical signal back into acoustic sound and
directs the sound into your ear canal. Some models have the speaker
placed in your ear canal. Some use a tube that connects the speaker to
plug or custom ear mold. Others have the components housed in a
custom-fitting shell.

16.  What determines the sound qualification
is all about how the instrument works.
 If the instrument requires you to blow
hard then that his how high and low it
will be.
 But if it requires you to play strings the
harder you strike them the louder it gets.
 So how the sound qualification works is
up to you.

17.  They are mainly used to see babies
inside of a woman's stomach so they
know what she/he looks like hahahha