Most of compression drivers have phasing plugs with annular slots. Existing theories give recommendations for positioning of annular slots to suppress air resonances in compression chamber. However, interaction of diaphragm’s mechanical resonances with the compression chamber’s air resonances makes the problem very complex and a general theoretical solution hardly exists. New approach, based on certain empirical assumptions, is proposed and explained. New phasing plugs have slots of a “meandering” shape that provide effective “averaging” of high-frequency acoustical signal received from different parts of compression chamber. The method is applicable to drivers having domes, cones, and annular diaphragms. Other aspects of the design such as efficiency, compression ratio, and difference between air resonances in dome and annular compression chambers are discussed.
(See document for exact affiliation information.)
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member Join the AES. If you need to check your member status, login to the Member Portal.
