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Language & Communication

Why does a message sent over a noisy radio channel degrade in intelligibility when the signal-to-noise ratio falls below a critical threshold?

A)Channel capacity increases message entropy
B)Error correction fails due to noise
C)Sampling rate fails Shannon's limit
D)Source coding lacks sufficient redundancy

💡 Explanation

Intelligibility decreases because error correction coding, which combats channel noise by adding redundancy, reaches its limit; therefore, uncorrectable errors appear in the received message, rendering parts unintelligible, rather than increased entropy or sample rate issues.

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