Patent attributes
What is disclosed is a diaphragm for an acoustic AMT transducer. The diaphragm is folded such that the folds form pockets (11 . . . 15), and the pockets next to each other are alternatingly open on one and the other face of the diaphragm. The pockets (11 . . . 15) are dimensioned so that the transformation ratio of the diaphragm velocity to the velocity of the air driven by the pockets in use of the transducer varies steadily from pocket to pocket across the diaphragm. For example, the respective width, depth and/or length of the pockets increases or decreases steadily from pocket to pocket across a plurality of said pockets. The acoustic transducer comprising the diaphragm has a well-balanced frequency characteristic across a wide frequency range.
