Abstract
As a means of reducing noises in a closed space, Helmholtz resonators are often used. Depending on how they are used, Helmholtz resonators are classified into a single resonator, parallel resonators and series resonators. Here with the purpose of proposing an optimal design technique, a single resonator and dual parallel resonators are considered. First a technique based on the fixed points theory, widely used for designing dynamic dampers, is developed. It is found that the technique can be applied to a single resonator but cannot to dual resonators. So a new iteration method, aiming to equalizing maximum values of sound pressure is proposed. It is found that the technique is applicable to both single and dual resonators.
