Which STI range corresponds to a bad listening environment?

Which STI range corresponds to a bad listening environment?

• A. 0.31-0.45
• B. 0.46-0.60
• C. 0-0.30
• D. 0.76-1.0

Answer: (C)

STI, or Speech Transmission Index, shows how reliably speech is conveyed in a listening space. It takes into account factors like background noise and room reverberation that interfere with understanding. When STI values are very low, speech intelligibility is poor, indicating a bad listening environment. The range from 0 to 0.30 reflects the worst intelligibility, hence the bad environment. Higher values mean clearer speech transmission, with mid ranges indicating moderate intelligibility and the highest range (near 1.0) showing an excellent listening environment. So the lowest STI range best fits a bad listening environment.

STI, or Speech Transmission Index, shows how reliably speech is conveyed in a listening space. It takes into account factors like background noise and room reverberation that interfere with understanding. When STI values are very low, speech intelligibility is poor, indicating a bad listening environment. The range from 0 to 0.30 reflects the worst intelligibility, hence the bad environment. Higher values mean clearer speech transmission, with mid ranges indicating moderate intelligibility and the highest range (near 1.0) showing an excellent listening environment. So the lowest STI range best fits a bad listening environment.