Sources Of Water Pollution. 1  Dumping of industrial wastes, containing heavy metals, harmful chemicals, by-products, organic toxins and oils, into the nearby source of water is one of the visible causes of water pollution.  Another cause for the contamination of water is the improper disposal of human and animal wastes.
Also see audio noise. Noise is unwanted electrical or electromagnetic energy that degrades the quality of signals and data. Noise occurs in digital and analog systems, and can affect files and communications of all types, including text, programs, images, audio, and telemetry.
Define Barriers to Communication. Communication is a conversational process of sending and receiving messages. Communication is important in business, personal relationships and daily tasks of going grocery shopping or grabbing a morning cup of coffee. Various barriers exist that can distort or prohibit a message from being properly understood or sent.