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DNR is the noise reduction level, a total of 10 levels. DSP Noise Reduction for Radio Shortwave Radio DSP digital signal processor is included. This Audio DSP Noise Reducer, with this tool you can use it to reduce noise when communicating.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.