I had a request from a XL2 customer looking to verify a sound masking installation. I created this document to step them through setting up the mask and performing the test.
There are many applications for sound masking systems:
The installed space is part of the sound masking system. Each installation has a unique floor plan; absorption of floor, walls and ceiling; and limited locations to install sound masking speakers.
Good practice is to verify operation of a sound masking system. Typically, the manufacturer of the system specifies the spectrum of the masking noise. The masking noise spectrum varies from location to location as a function of distance from speakers and the characteristics of the immediate space (e.g. in a hotel room, the bathroom is highly reflective while the sleeping area is absorptive)
The NTi Audio XL2 Audio Analyzer with the Spectral Limits Option is a powerful, handheld system for checking and documenting the installed performance of sound masking systems.
The attached document steps you through creating a limits or masks for testing sound masking system. At the end it references locations of additional information like pages in the XL2 User Manual and other instructions.