Types of noise

Answer 1

Noise is any disturbance or distortion that comes in the process of communication. It is a part of the secondary variable of the communication.

Noise can be of two types. It can be a physical noise, that is, any physical disturbance that can be heard and that comes or interferes in our communication. For instance, two friends are engrossed in a conversation, somebody alongside coughs aloud interrupting their talk. Or a person is watching a movie in a cinema hall, and somebody's phone makes a beeping sound. In both the cases, the disturbing elements can be categorized as physical noise.

Noise can also be Non-physical a part of which is also called 'Semantic Noise'. It is the disturbance in a communication brought about by a linguistic and cultural difference between the communicators. A person talking in a foreign language that can not be understood by the other person is an example. Non-physical noise can also be when there is an over-activity in our mental working, or an exhaustive and uncontrolled layers of thought processes in our brain that will preclude us from communicating successfully.

Answer 2

1. White noise: Contains all audible frequencies with equal intensity, often used for masking distracting sounds.
2. Pink noise: Decreases in intensity as frequency increases, commonly used in audio engineering to balance out frequency responses.
3. Brownian noise: Also known as Brown noise or red noise, it has a power density inversely proportional to the frequency squared, resembling the sound of a waterfall.
4. Impulse noise: Short duration noise bursts that can cause disturbances in audio or data signals.