Abstract
The Kansas City Municipal Auditorium, with an enclosed volume of more than 4,500,000 cubic feet, presents an outstanding example of excellent acoustic design. The ultimate success of this project was made possible through architectural consideration of acoustic requirements in the original design stage. In this paper, the various phases of the acoustic design of the auditorium will be discussed. Experience has proved that the theoretical formulae commonly used in making acoustic analysis of enclosures do not hold for auditoria having extremely large volumes. Reverberation measurements made in existing large auditoria have proved of invaluable aid in establishing the actual requirements for new design. With respect to surface treatment, particular emphasis will be placed on the value of acoustic specifications and job sample testing in guaranteeing complete fulfilment of the sound absorption requirements. The public address system was specially designed to coordinate with the acoustic characteristics of the auditorium and to ensure the best distribution of amplified sound with a minimum of wall and ceiling reflections. The features of this system, in their relationship to the acoustic and esthetic qualities of the auditorium, will be discussed.
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