Speech Intelligibility Tests

Speech-intelligibility tests for an unamplified talker are carried out using a single loudspeaker, ideally having a directivity similar to that of the human voice. Prerecorded words are presented in a neutral context carrier phrase such as, "Word number_is_", at one or more calibrated levels, in rooms exhibiting a variety of acoustical conditions. As we gleaned

Design of Rooms for Speech 589 Figure 17.13 Examples of Acoustical Defects (Doelle, 1972)

2j LONS DELAYED REFLECTIONS

3) SHADOW ZONE

A) FOCUSINC

5) FLUTTER ECHO

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