Q10.1 Sound - What Is the difference between sound & noise:

Sound is what we hear. Noise is unwanted sound. The difference between sound and noise depends upon the listener and the circumstances. Country music can be heard as a sound by one person and as an extremely annoying noise to another.

http://www.ccohs.ca/oshanswers/phys_agents/noise_basic.html

Intensity, pitch and volume:

• http://www.physicsclassroom.com/class/sound/Lesson-2/Intensity-and-the-Decibel-Scale
• http://www.physicsclassroom.com/class/sound

CONCEPT: What is Sound?

The scientific definition of sound, provides a fairly simple answer:

Sound is what we hear. Noise is unwanted sound. The difference between sound and noise depends upon the listener and the circumstances. Country music and/or jazz can be heard as a sound by one person and as an extremely annoying noise to another.

Reference: Physics of sound: http://www.physicsclassroom.com/class/sound