If you say something with asperity, you say it impatiently and severely. `I told you Preskel had no idea,' remarked Kemp with some asperity. = sharpness. if you speak with asperity, you say something in a way that is rough or severe, showing that you are feeling impatient (aspreté, from aspre )
A small imperfection or irregularity in the surface of magnetic tape Some gross imperfections can be visible on inspection of the tape, but most are not Asperities are numerous in all tapes and produce asperity noise, heard as a sort of low frequency rumble, in tape-recorded signals