Abstract
For this project, different large lecture halls were analyzed using various speech intelligibility measurement techniques. The goal was to determine how well these measurements correlate with each other and convey speech intelligibility. Objective speech intelligibility and other related acoustical measurements were made throughout each hall at varying distances from the speaker. These measurements were repeated in each hall in a standardized manner, allowing the results from the different halls to be compared effectively. These objective measurements were related to the subjective analysis of the hall to determine which measurements indicate an appropriate speech intelligibility level for that space. Background mechanical system noise was introduced into some of the halls to determine the effect on speech intelligibility. Some of the halls tested were modeled in an architectural acoustics computer program to determine how well the actual measurements correlate with the predicted measurements. Measurement techniques and results of the study will be presented.
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