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Acoustic Design for Studios

Acoustic Design for Studios
Acoustic Treatment and Design for Recording Studios and Listening Rooms by Ethan Winer Ethan Winer is co-owner of RealTraps, a leading manufacturer of acoustic treatment products. Ethan has at various times earned a living as a professional musician, computer programmer, circuit designer, recording engineer, composer/arranger, technical writer, acoustician, and college instructor. Ethan has more than 150 feature articles published in various computer and audio magazines. He’s produced dozens of educational and music videos, and composed three pieces for full orchestra, all of which have been performed. If you have questions about anything in this article, or anything else related to audio, you're welcome to ask in my Audio Expert Forum. This page was last updated on May 9, 2016. French readers, see THIS version that is being translated by Christian Parent.Hungarian readers, see THIS version that was kindly translated by Tamás Bánfi. This text will surely expand as I learn more. Top

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Marshall Day Acoustics - Australia Established in 1981, Marshall Day Acoustics has grown to become one of Australia's largest and most respected acoustic consultants. The engineers in our Adelaide, Melbourne, Perth and Sydney offices provide environmental noise assessment, architectural acoustics and vibration consulting services across Australia. OUR CLIENTS are architects, lawyers, planners, engineers, local authorities, developers and individuals who benefit from our creative design solutions to the highest quality standards. OUR STAFF are linked across our extensive network of offices to form one team of engineers, architects, musicians, designers and scientists. Our company philosophy, technical resources and uniquely creative working environment, result in an enviable level of staff retention that provides our clients with stable and committed project teams. OUR PROJECTS represent our proud history as an innovative, creative and specialist acoustic consultancy at an international and local level.

Real traps - test methods Performance below 100 Hz is what separates the men from the boys with acoustic treatment products. It's easy to build an absorber that works well at mid and high frequencies, and rigid fiberglass or acoustic foam one or two inches thick are common materials that do a fine job above 500 Hz. However, it's much more difficult to design an absorber that is highly effective below 100 Hz, yet these very low frequencies are usually the main problem in small or poorly proportioned rooms. With bass traps, performance below 100 Hz is what matters most! This reveals another limitation with the standard tests. Most US labs are not certified to measure below 100 Hz because they're not large enough to develop the reverberant field on which these tests rely.

CadnaA CadnaA (Computer Aided Noise Abatement) is the leading software for calculation, presentation, assessment and prediction of environmental noise. Whether your objective is to study the noise immission of an industrial plant, of a mart including a parking lot, of a new road or railway scheme or even of entire towns and urbanized areas: CadnaA is designed to handle all these tasks. With more than 30 implemented standards and guidelines, powerful calculation algorithms, extensive tools for object handling, outstanding 3D visualization and the very user-friendly interface CadnaA is the perfect software to handle national and international noise calculation and noise mapping projects of any size. CadnaA with Quadratic Residue Diffusor The goal became to find a surface geometry which would permit designers the predictability of diffusion from MLS diffusers with a wider bandwidth. The new system was again introduced by Schroeder in 1975 in a paper describing the implementation of the quadratic residue diffuser or Schroeder diffuser ? a device which has since been widely accepted as one of the de facto standards for easily creating diffusive surfaces.

Réglementations 19 janvier 2010 (mis à jour le 21 février 2014) - Ville durable, aménagement et construction Le confort acoustique est un élément important de la qualité de vie dans un logement. Or, environ 54% des ménages vivant dans des villes de plus de 50 000 habitants se déclarent gênés par le bruit. En effet, les sources de bruit sont multiples et les nuisances sonores peuvent entraîner une gêne, des troubles de la vigilance, de l’attention, de l’apprentissage, et affecter la santé (stress, troubles du sommeil, pathologies cardio-vasculaires,…).

Flush mounting to wall Flush Mounting to Wall flush-mounting minimizes diffractionseliminates back wall reflectionboosts speaker outputremoves the front baffle effectlow frequency room resonances need to be attenuated Implementing half space An enclosed dynamic loudspeaker drive unit has theoretically ideal working conditions only if its radiation space is either a full space (spherical radiation) or a half space (hemi-spherical radiation). To achieve ideal full space conditions the drive unit and the enclosure must be small compared to the radiated wavelength. Rappels d’acoustique physique L’acoustique comprend une variété de domaines à l’approche et aux techniques très différentes. En ce qui concerne la perception des sons, une incertitude apparaît, celle qui est due à la variabilité individuelle. Les événements d’origine acoustique s’imposent à l’être humain sans qu’il lui soit possible de les éviter. La perception auditive se reporte ainsi sur l’acoustique physiologique, tout en sachant que toutes les lois définissant les relations psychologiques entre grandeurs physiques et sensations sont des lois statistiques et les limites de validité apparaissent dès que l’incertitude devient plus grande que le phénomène à mesurer.

Wall behind the Loudspeaker Cancellation The mechanism of cancellation is very simple. When two identical signals are in anti-phase (180 degrees out of phase), they cancel each other. If the loudspeaker is a quarter wavelength away from a reflective wall, the reflected wave comes back to the loudspeaker in anti-phase (phase difference of half a cycle, see Figure 1) and thus cancels the original signal at that frequency. How complete the cancellation is depends on the distance and the reflection coefficient of the wall. AbsorptionCoefficients 0.00 = no absorbtion. 0.50 = 50% absorbtion. 1.00 = 100% absorbtion. Measurements are done according to a standard test method such as ASTM C423 or ISO. "In some cases, the measured sound absorption coefficient is greater than 1.00. As recommended by the test method, these values are reported as measured and not adjusted."

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