Background noise. Noise control measures will be undertaken to achieve a background noise criterion of NC-‐25-‐30 for all of the Lecture Theatre rooms (except booth operator/rack room, which must achieve NC-‐35), in order to provide good speech intelligibility for both local and remote listeners. This includes noise from HVAC and lighting ballasts. 1. Achieving these low NC levels means very tight control of fan noise and air flow conditions. 2. Noise-‐producing HVAC equipment including mixing boxes, fan-‐powered mixing boxes, and fan coil units will be located outside the Lecture Theatre rooms and not within the ceiling plenum space.
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Background noise. Noise control measures will be undertaken to achieve a background noise criterion of NC-‐25-‐30 NC-‐30-‐35 for all of the Lecture Theatre rooms (except booth operatorGalleries and Concourse & Library/rack room, which must achieve NC-‐35), Learning Commons spaces in order to provide good speech intelligibility for both local presentations and remote listenerstalks. This includes noise from HVAC and lighting ballasts.
1. Achieving these low NC levels means very tight control of fan noise and air flow conditions.
2. Noise-‐producing HVAC equipment including mixing boxes, fan-‐powered mixing boxes, and fan coil units will be located outside the Lecture Theatre rooms and not within the ceiling plenum space.
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Sources: Audio Visual Requirements