Chapter 1 : Sound And Hearing - Posted on 2016-07-19 by Austin Mullen

                                             Summation Of What I Learned :

Sound and Vibration

•   Sound is made possible through vibrations of an object displacing the air molecules around it.

? (Displace : to move or shift from the usual place or position.)

Sound Pressure Waves

• The most popular analogy of how a sound pressure wave works is an example of a rock thrown into a pond.
• The rock produces ripples that travel outward 360 degrees. 
• Due to the mass of the water molecules, energy is used up in making the water ripple. 
• Air molecules are pushed forward into other air molecules, This is called compression. 
• The air molecules transfer that energy into the molecules in front of them, and then re-adjust, leaving space between thier original position. This is called rare-faction.

The Inverse Square Law dictates the amount of energy lost per unit of distance. 

Also in this chapter we learn about high pressure and low pressure regions within a waveform, atmospheric pressure, amplitude, decibels, frequency, and reflection. I found this chapter to be very interesting and it definitely supplied the motive to learn more. In my first session with my mentor Jason Intelle. We reviewed the chapter and prepared for the chapter 1 test. my mentor was very helpful in guiding me in my understanding of the chapter.