In the previous work, matrix analysis was applied the derivation of the transfer matrix of a compression driver’s diaphragm. Its mechanical impedance consisted of lumped parameters and a part corresponding to the high-frequency breakups. In the current work the mechanical impedance is based on lumped parameters whereas the area of the diaphragm is presented as a function of frequency. The transfer function of compression driver is derived from the overall matrix that includes the frequency-dependent area of the diaphragm. The area is included in the transformation matrix that links the mechanical and acoustical parts. By equating the measured SPL for a given input voltage to SPL derived from the model, the expression for the frequency-dependent area of the diaphragm can be derived. This information is used in modeling and design of different drivers using the identified diaphragm.
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