Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency - June 2013
New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
Advanced Simulation of a Condenser Microphone Capsule
An advanced numerical model of a pressure condenser microphone capsule is presented. The acoustic space is divided into internal and external domains, with both domains dynamically coupled to the condenser diaphragm motion. The external acoustic domain is modeled using the boundary-element (BE) method, which allows the capsule surface to take an arbitrary geometry. The internal acoustic domain (both the viscous air film and the back chamber) is modeled as coupled cylindrical cavities with negligible axial pressure variation. The diaphragm is modeled as a circular tensioned membrane with negligible bending stiffness. Flow through the back plate is modeled by annular arrays of circular pores with generalized functions locating each pore position. Although the presented model is specialized for a simple pressure condenser microphone, the numerical implementation is sufficiently generic to allow for a large variation in capsule parameters. The complete model is used to generate a simulated response curve, which is compared to a response curve taken from an experimental prototype. The results show excellent agreement throughout the measured frequency range, indicating that this new coupled model may be used for advanced microphone characterization and design.
Click to purchase paper or login as an AES member. If your company or school subscribes to the AES Journal then you can look for this paper in the institutional version of the Online Journal. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.