Physical Barriers of Communication
Communication does not consist of words alone. Another set of barriers is caused by your own physical appearance, your audience, or the context of the document or the presentation. Your ideas, however good and skillfully imparted, are at the mercy of various potential physical barriers.
For Writing:
There is a whole barrage of possible physical blocks, jammed or jagged margins, fingerprints or smudges, unclear photocopies, unreadable word processor printout, water and coffee or tea spots etc.
For Speaking:
Mumbling, not enunciating, speaking too quickly, noises become of hissing ventilation, blowing air conditioning, ringing telephones, slamming doors etc. are different aspects of physical barriers.