What does MOS stand for in voice quality assessment?

What does MOS stand for in voice quality assessment?

• A. Packet loss percentage.
• B. Jitter variation.
• C. Mean Opinion Score—an estimate of perceived call quality.
• D. Bandwidth utilization.

Answer: (C)

Mean Opinion Score is a subjective measure of voice quality, reflecting how listeners perceive a call. It’s typically obtained by having people rate the quality on a scale (often 1 to 5) and then averaging the ratings. This score directly estimates user-perceived quality, which is why it’s the correct choice. The other options—packet loss percentage, jitter, and bandwidth utilization—are objective network measurements that influence quality but are not the measurement of user-perceived experience themselves.

Mean Opinion Score is a subjective measure of voice quality, reflecting how listeners perceive a call. It’s typically obtained by having people rate the quality on a scale (often 1 to 5) and then averaging the ratings. This score directly estimates user-perceived quality, which is why it’s the correct choice. The other options—packet loss percentage, jitter, and bandwidth utilization—are objective network measurements that influence quality but are not the measurement of user-perceived experience themselves.