Acousticaly or Acoustically: How To spell?
The word Acousticaly is misspelled against Acoustically, an adverb meaning "In relation to sound or to hearing."
Acoustically has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings acoustica & y which should not be misspelled with single 'L'
Wrong Spelling:  acoustica-l-y  Correct Spelling:  acoustica-ll-y 
Check more misspelled words of Acoustically to spell it correct.