Speech intelligibility enhancement by early reflections
Early reflections in a room can improve speech intelligibility for normal-hearing listeners, because the auditory system integrates them with the direct sound which results in an increased speech level. The present study investigated the underlying mechanisms involved in early reflection processing. Monaural and binaural speech intelligibility tests were performed with 9 normal-hearing listeners in a […]
Diffraction Around Corners and Over Wide Barriers in Room Acoustic Simulations
The diffraction effects of screens and other obstacles have been integrated in a room acoustic computer model using a theoretical model by Pierce, which is a further development of the original Geometrical Theory of Diffraction by Keller. This diffraction model is particularly interesting because it allows the modelling of a screen as a wedge with […]
Distance perception in a loudspeaker-based room auralization system
A loudspeaker-based room auralization (LoRA) system has been recently proposed which efficiently combines modern room acoustic modeling techniques with high-order Ambisonics (HOA) auralization to generate virtual auditory environments (VAEs). The reproduction of the distance of sound events in such VAE is very important for its fidelity. A direct-scaling distance perception experiment was conducted to evaluate […]
Auralisation of soundscapes in large buildings
Prediction of statistical noise values in an urban square by using auralisation
Intelligibillity prediction in rolling stocks using ray tracing methods
In public transport, acoustic intelligibility is extremely important as passengers have to be able to understand the different messages delivered by PA systems. An estimate of this acoustic property can be carried out by determination of STI or RASTI indexes. In this paper, a simulation based on the ray-tracing method and use of a commercial […]
Evaluation of concert hall auralization with virtual symphony orchestra
Authenticity of the simulation of room acoustics is evaluated by comparing auralizations with real recordings. Impulse responses are recorded in two concert halls with 34 loudspeakers positioned on the stage in the shape of an orchestra and a 3D microphone probe for spatial reproduction. The acoustics of the same concert halls are simulated with acoustics […]
Acoustical Design of Inner Galleries in Heydar Aliyev Center
Heydar Aliyev Center in Azerbaijan, Baku is an architectural landmark in terms of its symbolic contribution to the city. Contemporary organic architecture of the building, having the signature of the architect Zaha Hadid, ends up with no corners or rectilinear surfaces. Acoustical excitement starts up with the challenge of solving out the acoustical defects related […]
Workshop on Advanced Room Acoustic Prediction Modelling
The use of acoustic 3D modelling software has become increasingly popular among acousticians. Some software developers offer introduction courses for starting users. However, there is a need for more advanced courses for experienced modellers. Such a course should not only consist of lectures with the scientific background of the model, but should also give room […]
Room acoustic modelling techniques: A comparison of a scale model and a computer model for a new opera theatre
Today most acoustic consultants are using room acoustic computer models as a basis for their acoustic design. However, room acoustic scale modelling is still being used for the design in some major projects, although the costs and the time needed are significantly larger than those related to computer modelling. Both techniques were used by the […]
