This document discusses barriers to effective communication and different types of communication media. It identifies internal barriers like poor health or knowledge, and external barriers like noise or distractions. It also categorizes different forms of verbal communication as oral, written, or both. Non-verbal communication includes facial expressions, eye contact, and body language. Various media types are outlined, including audio-only, visual-only, audio-visual, multi-sensory using multiple senses, mass media reaching many people, and multimedia combining different content forms.

3. Muhammad Mehran
539
2ND.
Instructional technology

4.  Calm and Quiet environment.
 Proper physical facilities.
 Tension free mutual interaction.
 Proper weather condition.
 Proper facility of using multimedia.
 Availability of proper aid material.

5.  Internal barriers:
 Poor physical health.
 Poor background knowledge about
subject.
 Poor mental health,depression and
dissatisfaction.
 Handicap in understanding the symbolic
expression,verbalism,etc.

6.  External barriers:
 Polluted environment.
 Noise and other similar distractors.
 Invisibility.
 Physical discomfort.
 Improper functioning of communication
channels.

7.  External barriers:
 Non cooprative and unhealthy rivalries
and competitions among participants.
 Lack of proper motivation,incentive,and
enthusiasm needed to remain active.

8.  Verbal communication:
The base of verbal communication is
language.
Language can make use in three forms
1) Oral
2) Written
3) Oral and written

9.  Non-verbal communication:
 Facial expression.
 Eye contact.
 Gestures ,posture and movement.
 Voice and sounds.
 Smell and touch.

10.  Audio media:
Communication through radio,tape
recorder and speakers etc.
 Visual media:
Communication through
charts,diagrams and graphs etc.
 Audio-visual media:
Combination of audio and visual media.

11.  Multi sensory media:
Include five senses(smell,hear,touch,sight
and taste)
 Mass media:
Communication with the masses radio
t.v, newspaper ,books and email etc.
 Multimedia:

12. THANKS