DEFINE THEORY OF SOUND
Describe the theory and terminology of sound, sound measurement, and characteristics.
Given information about terms relating to audio production and information and diagrams describing the
theory of sound.
Demonstrate competency of the task skills and knowledge by responding to the multiple-choice test
covering theory and terminology of sound, sound measurement, and terminology.
Learning Event 1:
DESCRIBE THE THEORY OF SOUND
All liquids, solids and gases consist of very tiny bits of matter called molecules. Normally, these
molecules remain in one area until they are disturbed. As these molecules collide, they transfer energy
to each other through the medium (liquid, solid, or gas) which they make up.
The molecules continue to collide with each other and transfer energy until they make contact
with the eardrum. The ear converts these vibrations into electrical signals, or pulses, which the brain
processes. This conversion from eardrum vibrations to electrical pulses for the brain produces sound.
Molecules in any medium tend to stay in one spot and try to stay about the same distance apart
from each other (fig 1-1).
Figure 1-1. Undisturbed molecules