PURPOSE:to evaluate the effectiveness of a CD-ROM didactic material on the theme Acoustics and Psycho-acoustics in the learning of students in the Speech Pathology graduation course. METHOD: this study was carried out at Faculdade de Odontologia de Bauru( FOB/USP). Seventeen students from the second grade of the Speech Pathology course participated in this study: 7 from the Speech Pathology course from FOB/USP and 10 from the Speech Pathology course from Centro Universitário do Norte Paulista. Each student received a CD-ROM and was told to keep it for a 15-day period and study it. The evaluation of the students' learning was carried out in two moments in the pre and post-test, through written assessment using a multiple choice questionnaire with questions on the sub-themes Acoustics and Psycho-acoustics. RESULTS: statistically significant results were verified between evaluations: in the pre-test, the students' score was on average 29,82% and in the post-test, 91,76%. 100% of the students agreed that the material used provided them with a greater understanding of the theme. CONCLUSION: the CD-ROM significantly contributed to the students' learning.