Which STI range corresponds to a good listening environment?

Which STI range corresponds to a good listening environment?

• A. 0.46-0.60
• B. 0.31-0.45
• C. 0-0.30
• D. 0.61-0.75

Answer: (D)

STI, or Speech Transmission Index, measures how much of the spoken message remains understandable after it travels through a room. It’s a scale from low to high, and higher values mean clearer speech and better intelligibility. A good listening environment corresponds to a relatively high STI value, where reverberation and background noise haven’t masked the speech. The ranges on the lower end describe poorer intelligibility, while the range at the high end reflects comfortable, clear listening conditions. So, the best choice is the one that represents the higher end of the STI scale.

STI, or Speech Transmission Index, measures how much of the spoken message remains understandable after it travels through a room. It’s a scale from low to high, and higher values mean clearer speech and better intelligibility. A good listening environment corresponds to a relatively high STI value, where reverberation and background noise haven’t masked the speech. The ranges on the lower end describe poorer intelligibility, while the range at the high end reflects comfortable, clear listening conditions. So, the best choice is the one that represents the higher end of the STI scale.