Open Access Research Paper Views (767) Perception of acoustic frequencies in (Ab) users and non-users of psychedelics: a cross-sectional analytic study via the surface web Ahmed Al-Imam Int. J. Biosci. 13(5), 427-437, November 2018. DOI: http://dx.doi.org/10.12692/ijb/13.5.427-437 Keywords: Hallucinogenic substances, Ototoxic, Population Details