AlienXXX processed couple my SDR recordings (https://www.freesound.org/people/AlienXXX/sounds/334615/) and pointed out result with Audacity noise reduction. So I wanted to test same method by myself. Thanks AlienXXX, I didn't know that there is quite big difference in those noise reduction methods in Audacity versions. I think there is quite nice sounds in this record after noise reduction :)
SDR_Recording_003_NoiseRemoved.wav
聲道：2
類型：wav
electronic、digital、processed、radio、strange、noise-reduction、alien、abstract、bleep、sdr、sci-fi、noise、freaky、beep
電子、數字、處理、無線電、奇怪、噪聲降低、外僑、抽象、嗶、先生、科幻、噪聲、辣媽、嘟
資料來源：freesound ( https://freesound.org )