Materials on which sounds are stored and can be reproduced mechanically and electronically is Audio resources, which may be used by a teacher which enhances learning of verbal information for students.

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PHYSICAL PROPERTIES OF AUDIO :
1. Loudness – physiological sensation sensed in
the brain.
2. Pitch – subjective impression about the
frequency of sound.
3. Duration

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 Good for mass education.
 Effective for distant education.
 Can arouse positive emotions.
 Used for introduction or review of lesson.
 Can be recorded.
Talk
Discussion
Dramatization
 Poor attentiveness in students due to
unavailability of visual information
 Creative limitations
Chaotic buying procedures

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