Voice: As soon as we utter something the first thing which comes out is the voice. Same goes to the other side, whenever someone is speaking the first thing we listen is the voice, even if we are not able to see the speaker but just by the voice we can identify the gender, background, temperament and much more.

Clarity: The voices can be ambiguous or unambiguous, Pleasant or unpleasant at times. The clear voice will effectively convey the clear message. This is the reason that in some jobs it is essential that the applicant may possess clear and pleasant voice. For instance, job involving the task of the receptionist, or of attending the telephone, in call centers and for radio jockey.

Tone: The tone while speaking can be harsh & loud, soft & gentle, pleasing & comforting, sharp and full of rage etc. tone is that physical level of speech at which the sound of human voice is transmitted.

According to Raman & Singh, Tone is the attitude of the speaker as
revealed in the choice of vocabulary or the intonation of speech. Tone is used to convey an outlook consciously or unconsciously.

Pitch: Pitch is a measure to find out the high and low voice. The rise and fall of the pitch varies every time we communicate, depending upon with whom we are communicating and what we are sharing. Pitch has a lot to do with one’s state of mind.

Volume: The volume variation or the intensity is the essential part of paralanguage as it refers to the loudness and softness of voice. Most of the times people who have a loud voice are considered confident and successful, and the persons with low or dull voice are considered unsuccessful or lacking in confidence.

Articulation: According to Raman & Singh ―Articulation is the process by which sounds, syllables, and words are formed when your tongue, jaw, teeth, lips, and palate alter the air stream coming from vocal folds‖. Poor articulation is a result of changing the sounds due to
omitting, substituting and distorting the words. The problem area for poor articulation can be found in two major reasons: Joining or blending the two nearby words together.

For Example- 

Excluding the sounds which come at the end of words: Removing “g” from any word ending in “-ing”

Pause: Speaking should also go together with pause. While speaking with a pace, small temporary halt is important; we should not go on speaking without giving a pause. It is vital to pause at the right moment because if the pause is used in a wrong way, or at a wrong place it can create many problems. A pause can be highly effective in gaining the audience attention as it will make the content clear and easy to understand to the listener.

Pace of Speaking: Pace or speed of speaking refers to the rate at which a person speaks. This is the essential factor in understanding the reliability of the message and of the communicator. If a person speaks too slowly the audience will lose the interest and the value of speaker will decrease. Speaking too fast also lower the credibility as many times in this situation the words are overlapped and the meaning is lost.

Word Stress: Word stress is of great significance in communication and for the correct transmission of message. By putting stress or importance on different words in a sentence while uttering them can change the whole meaning of the message. For instance, the following series of sentence is stressing at different word (which is underlined) each time it is pronounced:

• She writes excellent business mails.
• She writes excellent business mails.
• She writes excellent business mails.
• She writes excellent business mails.
• She writes excellent business mails.

Quality: As it is important to use the good quality of words while communicating, at the same time it is vital to have good quality of voice. People ignores to pay attention to the harsh, cracked and dull voice, and are willing to listen the soft, soothing, motivating and the voice full of energy.

Rhythm: In the course of speech the strained and unstrained fundamentals which provides the varied modulation to statement is known as Rhythm. During the speech it ranges from swiftness to jerkiness. Rhythm is basically used to express emotions, and can be used when appealing the feelings or emotions of peers.