The purpose of this thesis is to study and analyze the subjective perception of both expert sound engineers and audio technicians from RAI regarding HeadRelated Transfer Functions (HRTFs). More specifically, it aims to determine which of the tested HRTFs most closely resembles loudspeaker listening by subjecting participants to a tailored test designed for the evaluation of selected HRTFs. The study seeks to compare and analyze various HRTFs, including those from artificial heads such as KEMAR and KU100, as well as personalized HRTFs of the different sound engineers, which are calculated and processed through specific procedures in order to maintain consistency between the test conditions.