Section 2: Properties of Sound; Reflection

In this section I learn't about how:

• How a sound wave of greater intensity sounds louder (loudness = measured in decibels.)
  
• The pitch of a sound that you hear depends on the frequency of the wave/sound wave.
  
• And lastly, As the sound source of the wave moves toward the listener, the wave reach the listener with a higher frequency. The pitch appears to increase because of the Doppler effect. (E.G. ambulance.)

The main focuses in this unit were; the intensity and loudness of waves, the frequency and pitch of the waves, and the Doppler effects. All in all what i found most interesting in this section was learning about the Doppler effects because i have heard briefly about it before but never understood it in detail.