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Can I install a loop system if background interference is above the critical level of -20dB?

April 26, 2017background critical install interference level loop system

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Can I install a loop system if background interference is above the critical level of -20dB?

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If just a small proportion of the looped area has electro-magnetic background interference above the critical level of -20dB then a loop system can be installed but signs must be displayed clearly marking the area that has interference.