Preparing the noise is normally external, such as

a speech can be difficult.  The purpose
of the speech is the keep your audience’s attention and entertain.  It is important your speech consist of three
parts.  The first part is the opening or
introduction.  This is where the speaker
introduces the subject and get the attention of the audience.  The second part is the body.  This is the largest portion of a speech and
consist of the information you are presenting to the audience.  The body usually contains arguments, facts,
and stories.  These points will be the
purpose of the speech.  The final part is
the conclusion.  The conclusion is the
summary of the points made in the body of the speech.  The conclusion should also include closing
remarks. ( It is important to have clarity
and good transitional phrases between each major part of the speech.  This helps the audience know where the speech
is at the present time.

            There are some key models of
communication used in preparing a speech. Transactional and linear models of
communication are used most in presentations. 
  Each speech contains a sender,
which is the person who is speaking.  The
second part is the channel.  This is the
device or way the message is being sent. 
The third part is the receiver. 
This is the person who picks up the message.  Finally, the noise can be a distraction that
interferes with the message delivery to the receiver.  In the linear model, the noise is normally
external, such as loud music. The linear communication model is known by its
behavior of transmitting a message from one to another. This model is also
considered a straight-line communication and is used in mass communications
such as mail, TV, and radio.  The
transactional model is known as the ongoing, circular process. In this type of
communication, the exchange of messages is between the sender and receiver.
Since transactional communication is an ongoing communication, the sender and
receiver can be known at the communicator because the message overlaps between
the sender and receiver and the two people communicate simultaneously.  In this model, as well as the linear model the
sender encodes a message and the receiver decodes the message.  Encoding is taking an idea and speaking those
words in order to convey the message. 
Decoding is the listening to the words and putting images to those words.
Therefore, they both become the communicator. 
The noise in the transactional model usually consists of physiological
noise and/or psychological noise. 
Physiological noise could be an illness, nervousness or any biological
factors.  Psychological noise could be
the unwillingness to listen.  This could
be anything that interferes with communication. (

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