Active Digital Car EMI Noise Filter, Improves Radio Reception, Eliminates ELOG Interference, CANBUS Warning Error Canceller and LED Anti-flicker, H7 Plug ABFT100-H7
XtremPro USB-F USB Digital Noise Filter Audio Playback Improved - Newegg.com
Audio DSP Noise Reducer DNR Digital Filter for SSB Ham Radio YAESU ICOM+Speaker | eBay
XFLOC2 2-Channel 80W Line Output Converter with Digital Noise Filter a — NVX
Audio DSP Noise Reducer DNR Digital Filter SSB Ham radio YAESU ICOM + Speaker | eBay
Dealing with DIGITAL NOISE (whine) – PedalSnake Blog