Diseño y construcción de un sistema automatizado rotativo biaxial para la medición de respuestas al impulso binaurales (BRIRs)

The perceptual information used for orientation in our auditory environment is encoded by means of acoustic pressure in our ears. Therefore, real or artificial sound fields can be simulated by means of binaural impulse responses (BIRs). The binaural technology allows the capture of sound through two microphones located in the auditory ducts of a mannequin head, recreating human listening and providing with this spatial information. However, the dummy head is a static system with limited possibilities to emulate the movements of the head. Immersive audio systems by means of headphones generally require the measurement of a large set of BIRs, especially for systems that enable the rotation of the sound field, where impulse responses must be measured in various orientations. The accuracy and stability of the location of the source, as well as the depth of the immersion during an auralization, can be increased by said set and thus take into account the movements of the listener in the simulated environment. Consequently, it is proposed to develop a biaxial rotation system through the design and construction of a functional structure that allows the azimuthal and elevation movement of a dummy head. The proposed system consists of an electro-mechanical device which is controlled in an automated way by means of an algorithm generated in the MATLAB programming software. This algorithm, in addition to controlling the movements of the device, is responsible for establishing the communication protocols with the electronic components and the processing of the BIRs. Finally, the limitations of this system are discussed and improvements are proposed for a later version of the prototype.

• Autores: Henao Paternina, Esteban; Mejía Martínez, Sergio
• Fecha de publicación: 2018
• Institución: Universidad de San Buenaventura
• Repositorio: Repositorio USB
• Idioma: spa
• OAI Identifier: oai:bibliotecadigital.usb.edu.co:10819/6028
• Acceso en línea: http://hdl.handle.net/10819/6028
• Palabra clave: Sistema de Rotación; BRIR; Dummy Head; Rotación Biaxial; Binaural; Rotation System; Tratamiento digital de señales; Procesamiento digital de señales; Reproducción de sonido; Vibración - mediciones; Medición acústicas
• License: Atribución-NoComercial-SinDerivadas 2.5 Colombia