Question

If a radio receiver amplifies all the signal frequencies equally well, it is said to have high (A) fidelity (B) distortion (C) sensibility (D) sensitivity

Short answer

The correct term for a radio receiver that amplifies all signal frequencies equally well is (A) fidelity, as it represents the accurate reproduction of sound without any distortion.

Step-by-step solution

Understanding the Terms

To choose the correct term, we first need to understand what each of the given terms means: 1. Fidelity: The quality of accurately reproducing a sound or image without any distortion. 2. Distortion: The alteration or change in the original shape or characteristic of a signal or sound. 3. Sensibility: The ability to respond to or detect small changes or stimuli. 4. Sensitivity: The degree to which a device or system can detect a change in signal, input, or stimulus.

Identify the Correct Term

We need to find the term that describes a radio receiver which amplifies all signal frequencies equally well. The term fidelity represents the accurate reproduction of sound without any distortion, which fits the description provided in the exercise. So, the correct answer is: (A) fidelity

Key concepts

Fidelity

In the world of audio and radio receivers, fidelity is a crucial concept. It refers to the accuracy and faithfulness with which audio equipment reproduces the original sound or signal. High fidelity, often abbreviated as Hi-Fi, means that every nuance and detail of the original audio is captured and played back without any alterations.
Think of it as listening to a recording that sounds exactly like a live performance.
When a radio receiver has high fidelity, it means it can reproduce sound across all frequencies without emphasizing or de-emphasizing any particular range. This ensures that what you hear is as close as possible to the original broadcast. Hi-Fi systems are important for music enthusiasts who value quality and clarity.

• Fidelity is about precision and purity of sound.
• It allows listeners to hear sound as it was intended.
• A high-fidelity system minimizes noise and distortion.

An ideal radio receiver with high fidelity will not introduce any unwanted sounds or distortions, making the listening experience highly enjoyable.

Signal Amplification

Signal amplification is essential in any radio receiver. It involves boosting weak signals to make them strong enough for further processing. This process ensures that even signals that have traveled long distances or have been weakened by obstacles are still audible and clear.
The purpose of amplification is not just to make the signal louder but to do so without altering the original wave shape or frequency balance.
In a well-designed amplification system, the signal is increased in strength without introducing distortion or noise. This is because the intent is to maintain fidelity and keep the signal pure. Signal amplifiers are crucial for:

• Ensuring clarity and readability of weak signals.
• Maintaining signal fidelity during enhancement.
• Supporting consistent output levels in radio receivers.

Without effective amplification, a radio receiver might struggle to reproduce low-level signals clearly, leading to loss of quality.

Signal Distortion

Signal distortion refers to any undesired changes that occur during the transmission or amplification of a signal. These changes can alter the quality, meaning, or usability of the signal, making it difficult to maintain fidelity.
Distortion can occur in various forms, such as harmonic distortion, where new frequencies are introduced, or amplitude distortion, where different parts of the signal are amplified unevenly.
Common sources of distortion include poor quality components, overloading of the amplification system, or interferences.

• Distortion affects the purity of the reproduced sound.
• It results in the loss of important signal characteristics.
• Minimizing distortion is crucial for maintaining high fidelity.

In radio receivers, low distortion is vital for ensuring that the sound is as close as possible to the original broadcast, providing a satisfying listening experience.