The disturbance or distortion in the transmission and processing of message signals is called

Options

A. Nolse
B. Attenuation
C. Interference
D. None of these

Answer

To solve the question "The disturbance or distortion in the transmission and processing of message signals is called," we will analyze the options provided and define each term to find the correct answer.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the disturbance or distortion that occurs during the transmission and processing of message signals.

2. **Defining the Options**:
- **Noise**: This refers to any unwanted disturbance or distortion that affects the quality of the signal. It is considered undesirable by the user of the signal and can interfere with the clarity of the message being transmitted.
- **Attenuation**: This is the reduction in signal strength as it travels through a medium. It is primarily due to energy losses and does not specifically refer to distortion or disturbance.
- **Interference**: This involves the addition of unwanted signals to the main signal, which can cause distortion. However, it is not the general term for all disturbances in signal transmission.

3. **Analyzing the Definitions**:
- Among the definitions, "noise" specifically refers to the unwanted disturbances that affect the transmission and processing of signals, making it the most appropriate term for the question.

4. **Conclusion**: Based on the definitions and analysis, the correct answer to the question is **Noise**.

### Final Answer:
The disturbance or distortion in the transmission and processing of message signals is called **Noise**.

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