That’s the sound you hear just as your vision system gets fried by a static discharge. A customer that makes faux veneered particle board was having problems with blowing out their vision systems due to static discharges.
They apply a plastic sheet with printed wood grain onto the board. The plastic has a strong static charge on it that discharges throughout the process. Most of the time this event is inconsequential except when it zaps their vision reader.
Installing a Super Ion Air Knife Model #111048, they blew ionized air onto the plastic film as it came off the roll and eliminated the static charges that zapped vision systems. The savings in replacing one vision system paid for the ion air knife.