Desarrollo de un toolbox en matlab para realizar experimentos psicoacústicos para la localización de fuentes sonoras.

Abstract

Binaural spatial audio aims to simulate sound sources in a certain location by using Head Related Transfer Functions (HRTF) caused by the scattering of sound around the head, pinna, and torso before it enters the ear canal. HRTFs are different for each person so if they are applied to a certain number of people they can get different results and misinformation. To obtain effective HRTFs for each person it is necessary to measure them, for them several methods have been developed, some using equipment such as the aneconic camera that consists of a specific arrangement of speakers and microphones, others through models that try to simulate the shape of the human head others with numerical methods and several more This task is complex and expensive and becomes inaccessible to people who want to venture into this field. One additional method of measuring HRTFs is through listening and obtaining data, for this reason the present titling work develops a toolbox in Matlab with a graphical interface to perform psychoacoustic experiments with different HRTFs that guarantee high quality 3D audio. The toolbox uses files in SOFA (Spatially Oriented Format for Acoustics) format that are freely accessible and available in the official repositories. The toolbox is designed to perform 4 experiments: 2 of relative localization and 2 of absolute location in the horizontal, medium, frontal planes. This toolbox has a graphical interface that allows you to interact with the user and its use is not complex so anyone can work with it. Once the experiments have been carried out, it allows to obtain statistical data and information from the users for their due analysis either in graphic form or in spreadsheets.