A new scattering method that combines roughness and diffraction effects
Most of today’s room acoustics programs make use of scattering coefficients which are used in order to describe surface scattering (roughness of material) and scattering of reflected sound caused by limited surface size (diffraction). A method which combines scattering caused by diffraction due to typical surface dimensions, angle of incidence and incident path length with […]
A new scattering method that combines roughness and diffraction effects
Most of today’s room acoustics programs make use of scattering coefficients which are used in order to describe surface scattering (roughness of material) and scattering of reflected sound caused by limited surface size (diffraction). A method which combines scattering caused by diffraction due to typical surface dimensions, angle of incidence and incident path length with […]
New Methods for Scattering Coefficients Computation for the Prediction of Room Acoustics Parameters
To predict acoustics of rooms using computer programs based on geometrical assumptions, it is important that scattering is included in the calculations. Therefore scattering is usually included in terms of scattering coefficients which are assigned to each surface telling the software the ratio between the part of the reflected energy which is not being reflected […]
How does Architecture Sound for Different Musical Instrument Performances?
This paper discusses how consideration of sound in particular a specific musical instrument impacts the design of a room. Properly designed architectural acoustics is fundamental to improve the listening experience of an instrument in rooms in a conservatory. Six discrete instruments (violin, clarinet, trumpet, xylophone, piano, and guitar) and a choir performance are designated for […]
The virtual reconstruction of the ancient Roman concert hall in Aphrodisias, Turkey
About two thousand years ago one of the world’s earliest and most beautiful concert halls were built in the city Aphrodisias, named after the goddess Aphrodite. It was a rich society, renowned for its marble and mastery in sculptures. Like many other cities in the Roman Empire there was an open-air theatre for plays and […]
The Alberta Jubilee Halls reborn with up-to-date acoustics
In August 2005 the fifty years old Jubilee Halls in Calgary and Edmonton were reopened after a major renovation project. In 1955 the two almost identical halls were built in commemoration of the first fifty years of the province Alberta, Canada. Although the halls were built according to the best acoustical knowledge of that time, […]
Is reverberation time adequate for testing the acoustical quality of unroofed auditoriums?
Especially during summertime, public squares, stadiums and other kinds of open spaces, are frequently used for live concerts (pop, jazz, classical, etc.) – both with and without amplification. Based on the first author’s PhD thesis, this paper aims at illustrating whether reverberation time (EDT, T30) and other acoustical parameters normally used to test the acoustical […]
Effects of changing the amount of absorption in a computer model of Queen’s Hall, Copenhagen, Denmark
Room acoustics modelling and auralizations are very useful tools in the design of acoustically sensitive spaces. One area of improvement for auralizations is the method of modelling the source directivity. A new method to incorporate source directivity is multi-channel auralizations. This study first evaluates the objective effects of using four and thirteen channel impulse responses […]
Acoustical computer simulations of the ancient Roman theatres
The objective of this work (under WP5 of the ERATO project) has been to create and analyse acoustical models of the selected theatres and odea by means of a computer simulation programme (named ODEON). Models have been created of the monuments both as originally built (to the extent that this is known), in their present […]
The ERATO project and its contribution to our understanding of the acoustics of ancient Greek and Roman theatres
Abstract. The ancient Greek and Roman theatres are famous for the excellent acoustics. However, it is not generally well known that different kinds of theatres were built, for different purposes and with different acoustical conditions. One of the aims in the ERATO project has been to investigate the acoustics of the open air theatres and […]
