Specifications

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Seated - The audience ear height is defined as 3.5 feet (approx. 1 meter) above the
surface.
Standing - The audience ear height is defined as 5 feet (1.5 meters) above the floor
surface.
Custom - Any custom value can be entered into the field.
Hidden - Checking the “hidden” box will make the surface opaque and remove it from
the SPL calculations. The surface will still be included in Array Wizard calculations -- if
you wish to remove it from these calculations, delete it from the model.
Locked - Surfaces cannot be accidentally moved or altered in the model. Once you
have completed a surface, it is highly recommended that you lock it to prevent
accidental changes.