Examinando por Materia "Modos de vibración"

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  • Publicación
    Acceso abierto
    Incrementar la reducción del tiempo de reverberación mediante la ubicación estratégica de material absorbente en los máximos absolutos de velocidad de partícula
    (2019) Gómez Román, Luis Felipe; López Mejía, Sebastián
    In the theory of geometric acoustics, a series of phenomena based on the reflections of sound waves in the limits of a room are studied. There are two phenomena that are usually given more weight in a conditioning. These are the vibration modes and the reverberation time. The reverberation time is defined as the time it takes the sound energy to decay 60 dB after the emitting source is interrupted. The modes of vibration are the interaction of the incident waves and the reflected ones product of the surfaces of the enclosure. In the latter, sound pressure maxima and minima are produced due to the superposition of the waves. These phenomena are usually treated with different types of absorbent materials that have a certain absorption. This absorption depends to a large extent on its porosity. The absorbent materials work under the principle of energy transformation, and this transformation occurs thanks to the friction of the particles in the immediacy of the material. The greater the velocity of the particles, the greater the absorption that each material provides. These particle speed maxima occur in the vibration modes of the room, more specifically at the pressure minima. With this premise, placing the absorbent material at maximum particle velocity, the reverberation time has been optimized 29% in the 125 Hz band for two classrooms at the University of San Buenaventura Medellín, San Benito.
  • Publicación
    Acceso abierto
    Sampling del tiple colombiano para el desarrollo de un instrumento virtual en formato VST
    (2015-11) Andrade Sánchez, Andrés Felipe; Santacruz Cano, Sara Isabel; Rincón Flórez, Raúl Enrique
    El objetivo principal de este proyecto es lograr desarrollar un instrumento virtual que genere los sonidos característicos de un tiple colombiano en un rango de dos octavas con tres dinámicas de intensidad y cuatro tipos de ejecución, utilizando métodos ingenieriles para realizar la caracterización tanto del instrumento como de la sala donde se captura dicho instrumento, de igual forma la captura y la programación para obtener el producto.