Optimización de plataforma con movimiento rotacional horizontal controlable para un sistema de medición de funciones de transferencia de cabeza
; Ferreyra, Sebastian Pablo ; Guido, Ricardo Martin
; Bordón, Juan Cruz ; Scaliti, Fermin 
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Fecha
2021-09-03
Editorial
Universidad Tecnológica Nacional
Revista
Revista Tecnología y Ciencia
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ISSN
1666-6933
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Español
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Resumen
Para simular computacionalmente fuentes sonoras distribuidas espacialmente y lograr sonido tridimensional, se utilizan las funciones de transferencia de cabeza (head-related transfer functions, HRTFs) como filtros. Para completar una esfera densa de puntos con estas funciones alrededor de un sujeto, es necesario posicionar una fuente sonora en diferentes ángulos y capturar las respuestas impulsivas mediante micrófonos ubicados en las orejas. Actualmente, estamos desarrollando un sistema de medición de HRTFs individuales que cuenta con un arco soporte semicircular vertical para altavoces y una plataforma rotativa horizontal controlable donde se ubica el sujeto. Contamos con una plataforma diseñada originalmente para otro propósito y que soporta hasta 400 N de peso. En este trabajo se propone rediseñarla y optimizarla para permitir el movimiento de una persona sentada, tolerando hasta ~2200 N. En base a ensayos realizados sobre la plataforma actual, se detectaron situaciones físicas no deseadas y se propusieron soluciones validadas mediante modelos teóricos y simulaciones numéricas del comportamiento estático.
To computationally simulate spatially distributed sound sources and achieve three-dimensional sound, head transfer functions (HRTFs) are used as filters. To complete a dense sphere of points with these functions around a subject, it is necessary to position a sound source at different angles and capture the impulsive responses using ear microphones. Currently, we are developing an individual HRTF measurement system that has a vertical semicircular support arc for loudspeakers and a controllable horizontal turntable where the subject is located. We have a turntable originally designed for another purpose and that supports up to 400 N of weight. In this work, it is proposed to redesign and optimize it to allow the movement of a seated person, tolerating up to ~2200 N. Based on tests carried out on the current platform, unwanted physical situations were detected and solutions validated through theoretical models and numerical simulations of static behavior were proposed.
To computationally simulate spatially distributed sound sources and achieve three-dimensional sound, head transfer functions (HRTFs) are used as filters. To complete a dense sphere of points with these functions around a subject, it is necessary to position a sound source at different angles and capture the impulsive responses using ear microphones. Currently, we are developing an individual HRTF measurement system that has a vertical semicircular support arc for loudspeakers and a controllable horizontal turntable where the subject is located. We have a turntable originally designed for another purpose and that supports up to 400 N of weight. In this work, it is proposed to redesign and optimize it to allow the movement of a seated person, tolerating up to ~2200 N. Based on tests carried out on the current platform, unwanted physical situations were detected and solutions validated through theoretical models and numerical simulations of static behavior were proposed.
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