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.
Noise may refer to any of the following: 1. Noise is any disturbance that interferes with data transmission and corrupts the quality of the signal. Below are some examples of where noise can be encountered in data transmission and common causes. Audio or Video signal noise. Degradation in audio and video signals can reduce the overall quality of audio and video. Often noise in audio and video is caused by one or more of the reasons below. 1  Loose connection, verify all your connections are properly connected. 2  If you have more than wire used for audio or video or other nearby cords or cables, make sure they are separated to prevent crosstalk. 3  Bad cables, try replacing cables.