Publicado:
2025-06-25Número:
Vol. 19 Núm. 1 (2025)Sección:
Visión InvestigadoraOmnidirectional acoustic source: design methodology and physical realization
Fuente acústica omnidireccional: metodología de diseño y realización física
Palabras clave:
Acoustic Radiation, Audio equipment, Measurement and Standardization, Omnidirectional sources (en).Palabras clave:
Radiación Acústica, Equipamiento de Audio, Fuente omnidireccional, mediciones y estandarización (es).Descargas
Resumen (en)
This paper details the design of a dodecahedron-type omnidirectional source for acoustic measurements. It begins with the geometric design of the dodecahedron, which has 12 pentagonal faces. Each face acts as a sound source, so its size must be adjusted according to the frequency range to be measured and the intended usage environment. The use of rigid and acoustically neutral materials, such as MDF or high-quality plastic, is proposed to avoid. unwanted interference and ensure uniform sound dispersion. The design includes a calibration method for adjusting each speaker to emit sound at the same intensity, as well as conducting tests in different environments using measurement microphones to fine-tune the calibration as needed. The selection of speakers considers uniform frequency response, low distortion, and high-quality materials to ensure reliable measurements. Additionally, an amplifier is selected to match the impedance and power of the speakers, offering high sound quality with low distortion, sufficient cooling, and adequate connectivity.
Resumen (es)
En este escrito se detalla el diseño de una fuente omnidireccional tipo dodecaedro para mediciones acústicas. Este comienza con el diseño geométrico del dodecaedro, que tiene 12 caras pentagonales. Cada cara actúa como una fuente de sonido, por lo que el tamaño debe ajustarse al rango de frecuencias a medir y al entorno de uso. Se propone la utilización de materiales rígidos y acústicamente neutros, como MDF o plástico de alta calidad, para evitar interferencias no deseadas y asegurar una dispersión de sonido uniforme. Se contempla el diseño del método de calibración del sistema con el ánimo de ajustar cada altavoz para emitir sonido con la misma intensidad y la realización de pruebas en diferentes entornos usando micrófonos de medición para ajustar la calibración según sea necesario. Se tiene en cuenta la selección de altavoces con respuesta en frecuencia uniforme, baja distorsión y materiales de alta calidad para asegurar mediciones fiables, además de la elección de un amplificador que coincida con la impedancia y potencia de los altavoces y que ofrezca alta calidad de sonido con baja distorsión y que proporcione suficiente enfriamiento y conectividad.
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