M.Sc Thesis

M.Sc StudentViks Aharon
SubjectThe Effects of Room-Coupling, Surface-Area Enlargement and
Asymmetry on the Acoustical Quality of Halls.
An Architectural-Acoustical Approach
DepartmentDepartment of Architecture and Town Planning
Supervisor ASSOCIATE PROF. Giora Rosenhouse


The research deals with the complex relations between the shape of large rooms and their acoustic response.

Of the architectural design elements, we focused on the following topics: the surface structure and its influence on the acoustic qualities of rooms; the reciprocal influence of coupled rooms, considered as complex spaces; and the influences of asymmetry in halls as means to improve the musical or the spoken-word performance in them.

The so-called “quality of sound” of a hall described as a function of standing by many "objective, subjective” and cross-correlated criteria which are being developed since the beginning of the 20th century.

The most important of them is the Reverberation Time. The latter has been calculated and measured by the author in several Israeli auditoriums. The results were used in the thesis.

The demand for multipurpose uses of auditoriums leaves the acoustician with great challenges. By activating mechanical and electro-acoustical means, “Variable Acoustics”, can be achieved.

The work shows that “good acoustics” in halls has been achieved in those renowned halls that have enlarged surface area and preferred dimensions; as was done in the “Classic” and is being repeated in the ‘Post-Modern” architecture styles.

Most important of all is the collaboration between the acoustician and the architect. Prominent examples to this principle are halls designed by the architect Alvar Aalto which exemplify the theme of this thesis.