Read the dictionary definition of grating. All definitions for this word.
1. optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum
2. a frame of iron bars to hold a fire
3. a barrier that has parallel or crossed bars blocking a passage but admitting air
4. unpleasantly harsh or grating in sound
1. a gravelly voice