Atlas Sound Atmosphere C-ZSV Zone, Source, and Volume Wall Controller (Black) - Manual (Page 36)

Atmosphere
User Manual
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RULE 4: The sensor should be placed towards the middle of the zone with nearly equal distance between the sensor and immediately
adjacent loudspeakers.
The reason behind this rule is to prevent similar issues encountered when considering Rule 1. If a sensor is located too close to any one speaker, the
sound from that speaker could easily mask the ambient noise level from the sensor while an announcement is in progress. Since one sensor is usually
placed in a zone with many loudspeakers, it is best to place the sensor where it is nearly equidistant from the immediately adjacent loudspeakers.
RULE 5: In spaces with high ceilings, place the sensor along a side wall at a location 6 to 12 feet above the listener.
High ceiling spaces present a unique set of problems. In certain spaces, the ambient level near the top of the high ceiling does not vary significantly
enough to match the noise changes near the floor. In this type of space, a sensor located in the high ceiling may lose its effectiveness. This problem is
compounded when multiple zones are included in the same high-ceiling area. The ambient level is a culmination of the noise from all zones in the space.
Therefore, it is usually best to place the sensors on a side wall or support column. This allows the sensor to be placed closer to the noise source and
allows adherence to the previously mentioned rules. With this mounting location, adherence to Rule 2 is now more difficult. In order to provide proper
level detection, the sensor should be located between 6 and 12 feet above the head of the listener. This would place the sensor between approximately
12 and 18 feet above the floor. This allows the sensor to be placed at a point that will reduce the effects of noise sources that are located close to the
sensor location. As in Rule 2, multiple sensors may also be used to help avoid overreaction to localized noise sources.