Each individual is unique and is a product of many factors singular to him/her only. There are people in the society who overtalk i.e. speak considerably more than what is required and at the same time, there are undertalkers, who don't speak enough. Similarly, we find fast talkers who talk too fast or slow talkers, who talk too slow. Quiet talkers speak very softly and the loud talkers speak too loudly.
When we come in contact with any individual with whom we have to interact on a regular basis, we have to adjust with them. It is rather being over ambitious, to expect them to change totally so as to suit our own likings and dislikings.
Sometimes repeated requests to them may yield some result, but the habitual loud talkers revert back to their habit sooner than later.
It is said that the people who are born in larger families consisting of many members generally talk louder as they have to converse in a larger group. Similarly, the people who are hard of hearing themselves, tend to talk louder.
Let us encourage each other in sharing knowledge.