positive. the duck and stuff continuously make a noise you can hear. buthe proximity bomb and c4 do not. they used to not make a initial beep either. that was likely added to nerf it a bit cus you could just plant it where a target would walk by and thats a kill.
but when they added the jnitial beep. it seem to make it continuously beep tho an audible sound isnt being emitted at all.
i do agree with you they should stop nerfing stuff that are fun especially if they in no way affect SA.