: PRO-RANGE DESK PAGING MICROPHONES by Communication Technology with DSP noise cancelling option Preamplified Single and Two Zone DPM 102B, DPM 202B PRO-SERIES desk paging microphones incorporate a range of advanced specification features to accommodate the modern requirements of high intelligibility sound systems.
: NCH Noise Cancelling Headphones: (Not DSP) These headphones reduce the ambient background noise to allow you to listen to the program source peacefully.
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