Correct spelling for the English word "acoulalion" is [ˌakuːlˈali͡ən], [ˌakuːlˈaliən], [ˌa_k_uː_l_ˈa_l_iə_n] (IPA phonetic alphabet).
An instrument for enabling the very deaf to hear; it is constructed on the principle of the telephone with a sound-magnifying attachment.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.