Data about ABO blood group and cochlear function.This data file contains information on the age, blood group, and gender of the participants, as well as the results of all conducted tests. The test results included pure tone threshold (PTA), otoscopic examination, tympanogram, acoustic reflex thresholds, tone-in-noise detection test, TEOAEs, DPOAEs, input/output (I/O) function, and SOAEs.