Nonlinear Versus Parametric Effects in Compression Drivers
The compression driver has always been and remains an essential component of sound reinforcement systems despite its unavoidable nonlinear distortion. This distortion is caused by various effects, including adiabatic compression of air in the front chamber, modulation of the chamber's air stiffness, and modulation of the chamber's viscous losses. Each of these sources of distortion is inherent in the compression driver's operation, each adversely affects the compression driver's performance in its own specific way, and each is characterized by a different nonlinear 'signature.' Comparative analysis of these distortion sources is undertaken. Nonlinear and parametric effects are explicitly expressed. The influence of diaphragm displacement, compression ratio, and chamber sound pressure on the generation of intermodulation and harmonic distortion is explored. Some design recommendations are given.
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 and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is temporarily free for AES members.