Question

Which of the following is NOT a requirement of Hi-Fi systems?
1. Signal to noise ratio should be better than 50 dB
2. Frequency response should be flat within ±10 dB over 40 Hz to 15KHz
3. Stereo phonic effect should be provided
4. Nonlinear distortion should not be more than 1%

Answer 1

Correct Answer - Option 2 : Frequency response should be flat within ±10 dB over 40 Hz to 15KHz

Hi-Fi refers to High Fidelity – which is a measure of the degree of faithful reproduction of sound. Systems with high faithfulness are called Hi-Fi systems. In these systems, the output audio is an exact replica of the input audio.

There are certain requirements to be met by an audio system for it to be classified as a Hi-Fi system which are given below-

• Signal-to-noise ratio should be better than 50 db
• Frequency response should be flat over 40-15000 Hz (within + or – 1 db)
• Non-linear distortion should be < 1%.
• Dynamic range of at least 80 db is required.
• Stereophonic effect (adding a sense of direction to sound) should be provided.
• Environmental conditions should be such as to reduce external noise.

Since Option(2) is incorrect statement about Hi-Fi system,So option(2)

Is answer.