Dolby Atmos Mixing Room "PJ"
Diseño acústico & electroacústico | Acoustic & electroacoustic design
Los modos propios
The eigenmodes
La formación de modos de resonancias resulta un aspecto relevante en el análisis de frecuencias bajas y muy bajas para salas de estas dimensiones. Utilizando el programa de simulación 'Room Eigenmodes Simulator v1.1', desarrollado por Y-Akus, se calcularon las frecuencias de resonancia hasta los 118 Hz, límite indicado mediante la fórmula de Schroeder considerando un tiempo de reverberación objetivo a frecuencias medias de 0,25 segundos según la EBU Tech 3276 standard “Listening conditions for the assessment of sound program material: monophonic and two–channel stereophonic”.
Resonances or eigenmodes is a relevant aspect in the analysis of low and very low frequencies for rooms of these dimensions. Using the simulation software 'Room Eigenmodes Simulator v1.1', developed by Y-Akus, the resonance frequencies were calculated up to 118 Hz, a limit indicated by the Schroeder formula considering an objective reverberation time at medium frequencies of 0.25 seconds according to the EBU Tech 3276 standard “Listening conditions for the assessment of sound program material: monophonic and two–channel stereophonic”.
Mediante este análisis se detectaron las principales zonas de cancelación debidas a los primeros modos propios de la sala. A partir de esto, se determinaron las posiciones ideales de monitores L-R y sweet spot.
Through this analysis, the main cancellation zones due to the first eigenmodes of the room were detected. From this, the ideal positions of L-R monitors and sweet spot were determined.
Acondicionamiento acústico
Acoustic conditioning
Cielorraso: diseño de nubes fonoabsorbentes de 6" de espesor con instalación de luces
Muros laterales: montaje de paneles fonoabsorbentes de 4" de espesor y paneles de madera reflectivos inclinados para eliminar ecos flotantes.
Muro frontal: montaje de paneles fonoabsorbentes de 4" y 6" de espesor + trampas de graves en cada esquina.
Muro trasero: montaje de paneles fonoabsorbentes de 4" de espesor + dos difusores tipo QRD7 + trampa de graves en esquina.
Ceiling: 6" thick sound-absorbing cloud with lighting installation
Side walls: mounting of 4" thick sound-absorbing panels and sloped reflective wood panels to eliminate floating echoes.
Front wall: mounting of 4" and 6" thick sound-absorbing panels + bass traps in each corner.
Rear wall: mounting of 4" thick sound-absorbing panels + two QRD7-type diffusers + corner bass trap.
Side walls: mounting of 4" thick sound-absorbing panels and sloped reflective wood panels to eliminate floating echoes.
Front wall: mounting of 4" and 6" thick sound-absorbing panels + bass traps in each corner.
Rear wall: mounting of 4" thick sound-absorbing panels + two QRD7-type diffusers + corner bass trap.
Sistema Dolby Atmos 7.1.4
Dolby Atmos 7.1.4 sound system
El sistema de audio se compone de lo siguiente:
• Altavoces L-C-R, Ls, Lrs, Rs y Rrs: Kali Audio IN8
• Altavoces superiores Ltf, Ltr, Rtf y Rtr: Kali Audio IN5.
• Subwoofer: 1x Kali Audio WS-12.
The audio system consists of the following:
• L-C-R, Ls, Lrs, Rs and Rrs speakers: Kali Audio IN8.
• Ltf, Ltr, Rtf and Rtr top speakers: Kali Audio IN5.
• Subwoofer: 1x Kali Audio WS-12.
Vista 360°
360° view
Modelo de simulación acústica
Acoustic simulation model
Se modeló la sala con un grado "medio" de simplificaciones geométricas. De este modo, las simulaciones acústicas resultantes serán precisas y no consumirán un tiempo de cómputo excesivo a la vez que no se perderán detalles importantes de las superficies principales. Para el análisis geométrico y de cobertura se ubicó un punto receptor en el sweet spot, sobre el que se mapearon los resultados de los parámetros acústicos de interés.
Todos los análisis y simulaciones se realizaron con el programa EASE y su módulo AURA 64-bits
Todos los análisis y simulaciones se realizaron con el programa EASE y su módulo AURA 64-bits
The room was modeled with a "medium" degree of geometric simplifications. In this way, the resulting acoustic simulations will be accurate and will not consume excessive computational time while important details of the main surfaces will not be lost. For the geometric and coverage analysis, a receptor point was located in the sweet spot, on which the results of the acoustic parameters of interest were mapped.
All the analyzes and simulations were carried out with the software EASE and its AURA 64-bit module.
All the analyzes and simulations were carried out with the software EASE and its AURA 64-bit module.
Los resultados
The results
Tiempo de reverberación Schroeder promedio
Average Schroeder reverberation time
Las conclusiones
The conclusions
Al comenzar el proyecto, el cliente nos dio como premisa lograr una sala apta para la edición y reproducción de piezas musicales incluyendo la opción de un sistema Dolby Atmos. El tratamiento acústico se basó en la utilización de material poroso (lana de roca revestida), reflectivo (madera) y difusores, con la idea de abarcar todo el ancho de banda de frecuencias de interés. Controlando la cantidad de cada uno de estos materiales se ha conseguido un tiempo de reverberación prácticamente “plano” en el entorno de los 0,25 segundos, dando cumplimiento con las exigencias Dolby.
Se calcularon las posiciones ideales de sweet spot y altavoces, con sus respectivos tiempos de delay y niveles de presión sonora para evitar problemas de fase y coloración, alcanzando una imagen sonora correcta y perfectamente envolvente.
Los altavoces seleccionados cumplen sobradamente con las exigencias en cuanto a respuesta en frecuencia, rango dinámico y cobertura espacial. Combinado con la acústica de excelencia lograda, la experiencia sonora en el interior de la sala resulta de altísima calidad.
At the beginning of the project, the client gave us as a premise to achieve a room suitable for editing, mixing and playing musical pieces, including the option of a Dolby Atmos system. The acoustic treatment was based on the use of porous material (coated rock wool), reflective panels (wood) and diffusers, with the idea of covering the entire bandwidth of frequencies of interest. By controlling the amount of each of these materials, a practically “flat” reverberation time of around 0.25 seconds has been achieved, complying with Dolby requirements.
The ideal sweet spot and speaker positions were calculated, with their respective delay times and sound pressure levels to avoid phase and coloration problems, achieving a correct and perfectly enveloping sound image.
The selected loudspeakers more than meet the requirements in terms of frequency response, dynamic range and spatial coverage. Combined with the excellent acoustics achieved, the sound experience inside the room is of the highest quality.
The ideal sweet spot and speaker positions were calculated, with their respective delay times and sound pressure levels to avoid phase and coloration problems, achieving a correct and perfectly enveloping sound image.
The selected loudspeakers more than meet the requirements in terms of frequency response, dynamic range and spatial coverage. Combined with the excellent acoustics achieved, the sound experience inside the room is of the highest quality.
