There are now quite a number of so-called “super tweeter” products on the market, all claiming bandwidth beyond 20 kHz. However, this bandwidth is typically achieved only within a few degrees of the loudspeaker axis, and the real power bandwidth is much lower. The limiting factor in all piston-based designs is the “ka = 2” relationship between wave-number and radius. At 20 kHz, this results in the requirement that a is about 5 mm. By removing the requirement for the diaphragm to move as a piston, the “Balanced Mode Radiator (BMR)” allows the use of larger diaphragms, making the possibility of real power bandwidth beyond 20 kHz a practical reality.
(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.
