An impedance matched surface is able, in principle, to totally absorb the incident sound and yield no reflection, and this is desired in many acoustic applications. Here we demonstrate a design of impedance matched sound absorbing surface with a simple construction. By coupling different resonators and generating a hybrid resonance mode, we designed and fabricated a metasurface that is impedanc...

Room-acoustic energy decay analysis of acoustically coupled-spaces within the Bayesian framework has proven valuable for architectural acoustics applications. This paper describes an efficient algorithm termed slice sampling Monte Carlo (SSMC) for room-acoustic decay parameter estimation within the Bayesian framework. This work combines the SSMC algorithm and a fast search algorithm in order to...

Some recent concert hall designs have incorporated coupled reverberation chambers to the main hall that have stimulated a range of research activities in architectural acoustics. The coupling apertures between two or more coupled-volume systems are of central importance for sound propagation and sound energy decays throughout the coupled-volume systems. In addition, positions of sound sources a...

The study of Architectural Acoustics involves the understanding of sound build up and its propagation in a simple room. This knowledge can be further applied to larger rooms and performance areas such as concert halls, theaters and sports arenas. The basic acoustic parameters that govern the quality and intelligibility of sound for the listeners as well as the performers are needed to be evalua...

The astonishing acoustical quality of Hagia Sophia lives in harmony with its architectural and engineering magnificence. The baldness of its imperial creator and the technical savvy of architects and builders present today an unmatched structure that survived almost 1500 years, since 537. A description of Hagia Sophia, written in 544 by Prokopios [1] illustrates the awe with which Hagia Sophia ...

2D and 3D virtual architectural models are the common ground of many studies, including environmental protection, energy saving, or human well-being. Building or urban environment simulations concern for instance heat transfer, lighting, and acoustics, each of them requiring physical parameters additionally to the geometric representation. Furthermore, geometry does not generally comply straigh...

Abstract The author presents new and rediscovered information about the use of physical models in design processes carried out by architectural civil engineers. Over last three centuries these have included mechanical models, form-finding measurement models. Measurement especially were are particularly important for innovative engineering projects that lie beyond current experience or without p...

a combined adaptive tetrahedral tracing and edge diffraction model" (2014). A major challenge in architectural acoustics is the unification of diffraction models and geometric acoustics. For example, geometric acoustics is insufficient to quantify the scattering characteristics of acoustic diffusors. Typically the time-independent boundary element method (BEM) is the method of choice. In contra...

1:35 1pAAa1. Designing for speech privacy in offices. Kenneth P. Roy ~Armstrong World Industries, Innovation Ctr., 2500 Columbia Ave., Lancaster, PA 17603! Speech privacy is an important component of the building interior environment, as it affects the satisfaction and performance of the occupants and thus their productivity. Privacy, both in terms of the confidentiality of conversations and re...

Fabrice Silva, Vincent Debut, Philippe Guillemain, Jean Kergomard, Christophe Vergez. Some simulations of the effect of varying excitation parameters on the transients of reed instruments. 21st International Congress on Acoustics (ICA 2013), Jun 2013, Montréal, Canada. Proceedings of Meetings on Acoustics, Proceedings of Meetings on Acoustics, Vol. 19, 035058 (2013), pp.4aMU4, 2013, Internation...