Central Volume Control Series
Model LM6-CVC
Unit shown 6
The Lencore Spectra® Sound Masking LM6-CVC unit operates as a central volume control from which global volume adjustments can be made for up to 50 main units and covering up to 33,000 square feet system-wide. The unit consists of an individual self-contained noise generator, audio amplifier, loud speaker in a damped metal enclosure, powered by 16/18 volts AC and is capable of driving one secondary model.
Each central volume control unit is a main unit, solid state and consists of a CMOS/MSI digital random sequence noise generator, electronic amplifier and filter for active spectrum shaping. Each unit is equipped with a 10-step volume control and an additional continuous volume control, and the central volume adjustment control. Range of sound level: 41-86 dBA (measured at 1.5 feet from speaker). Additionally contained is a continuous and completely separate volume control for paging/music.
The masking system can be uniquely adjusted to suit a variety of standard and non-standard ceiling conditions by making adjustments to the amplitude and spectra shapes. This adjustment can be made in increments of +/ - ½ dB. In addition, the system has the adjustment capability to provide the most unobtrusive sound while obtaining the maximum speech privacy that meets ASTM E-1130 standards for speech privacy and sound uniformity. The spectrum shape adjustment ranges from 1dB at 125 Hz to 20 dB at 8,000 Hz (typical).
The Spectrum Graph (measured in A-scale) depicts the range of spectra attained with standard fiberglass or mineral ceiling tile. The lower spectra provides for the most unobtrusive sound, while the upper spectra provides for the maximum speech privacy.
Lencore's Spectra® System can incorporate a high-quality paging and music system to handle all call paging, zoned paging, voice over IP, paging through the phone system, security and life safety paging.
Lencore's Spectra® can work in conjunction with Lencore's SPEC™ software program which serves as a diagnostic and planning tool for sound masking and paging systems to qualify and analyze the acoustical performance levels of your space, enabling a fact-based approach to predicting spatial and temporal uniformity of sound for sound masking.
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