Additional Considerations

Depending on their significance to the project at hand, secondary characteristics such as timer functions, zoning and control methods, security features, paging and music functions, and aesthetics may also need to be included in the specification.

Also, sound masking systems must meet Underwriters Laboratories (UL) or similar standards for electrical safety. In the United States, any components installed in air-handling plenum or via cut-throughs in a suspended ceiling must also meet UL 2043 – Standard for Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces. Cables must be plenum rated. Low-voltage power supplies should conform to the UL 1310 - Standard for Class 2 Power Units or the system requires conduit. Digital masking systems must meet electromagnetic interference (EMI) standards. If sustainability is a goal, one should also request Restriction of Hazardous Substances (RoHS) compliance.

Own the Spec

Even with a well-written specification, a user can end up with a non-conforming sound masking system unless the specifier, user, or another person involved in the design and procurement process is appointed as a guardian whose responsibility it is to ensure bids, and the system ultimately selected, actually meet the criteria outlined.

Asking for drawings can help to identify differences between proposals because they show the components, quantities, and locations, making it easier to spot design shortcuts and discuss them with the vendor. Requesting a spec compliance form indicating their adherence to each aspect can also be useful. Vendors should note any deviations from the spec, describing how their system’s design differs.

It is also wise to learn what services are offered in conjunction with each proposal under consideration. The system should be supported by professionals who can properly design and implement it, and provide the user with ongoing support.

In Conclusion

Today’s interior design trends and increased occupant densities mean that users are more reliant than ever on sound masking to improve speech privacy and control noise in the workplace. The measurements and adjustments an acoustician or vendor makes after a sound masking system is installed are an essential part of the commissioning process.

While one can readily assess whether one likes a particular sound or not, in all but extreme cases, it is impossible to subjectively tell whether a sound is providing the expected level of masking. In order to make this determination, one has to ascertain whether the desired curve has been met throughout the facility. Users can be assured of their sound masking system’s performance by requesting a detailed report of the tuning results. This document should demonstrate that the desired curve is consistently provided throughout the space, ensuring that the system’s benefits are enjoyed equally by all occupants. In this way, users can also be confident that they are deriving the full benefit from their investment in sound masking technology.

LogiSon Acoustic Network Today’s interiors are even more dependent on sound masking for speech privacy and noise control. The LogiSon Acoustic Network is tuned using TARGET, an application that accurately adjusts each small zone to the specified spectrum, maximizing benefits and occupant comfort. Worldwide distributors provide turnkey services and support. http://www.logison.com