The use of two Listen Technologies MLD9 loop systems, whose cabling traversed the sanctuary floor more than 50 times underneath a complex combination of floor coverings, in addition to 23 Listen Technologies CMR3 calibrated receivers, assures that clear, intelligible audio is available for all congregants.
"This was by far the largest loop project we have ever done," observes Brent Everhart, sales engineer at Audio & Light, the Greensboro AV systems integrator that sourced the Listen Technologies system and installed it, in conjunction with Curtis Kasefang of the Theater Consultants Collaborative, the design consultancy on the project. The total square footage is over 6,500, and there was a unique challenge in keeping the cabling intact as the flooring was being installed. "The materials are different in various parts of the room, with either carpeting or vinyl covering on the floor," Everhart explains. "The concern was to avoid having the flooring installers damage the loop by cutting it as they installed the coverings. We trained them on the loop's location, but we also set up an alarm system that would alert us via the Crestron touch panel control system if it was cut, so we could repair it before the floor was finished."
Audio & Light's ingenuity is matched by Listen Technologies' MLD9 loop system (with features such as automatic gain control and metal loss correction), which provides an area of coverage of 13,990 square feet or can be used to drive two perimeter loop areas of 35,520 square feet, each with an unsurpassed clarity of sound for music and superior intelligibility of speech.
The MLD9 MultiLoop Driver provides a solution for situations where a simple loop-around-the-room perimeter will not work. Phased arrays, such as those used at First Presbyterian Church, provide an elegant solution for buildings with metal structures or reinforcements by dramatically decreasing the spill of the magnetic signal outside of the room, allowing hearing loops to be installed in adjacent rooms without interfering with one another. Arrays can also be used to change the way two loops interact with each other, providing solutions to even the most complex installation problems. "Between improved signal strength and the control of overspill, we get a strong, consistent signal throughout the sanctuary," says Everhart. "When the new systems were first used at a service on Dec. 21 of last year, everyone noticed the improvement. The Listen Technologies system made a huge difference in a very large space."