Smartphone Microspeaker and Port Acoustics: Linear and Nonlinear Analysis

Application ID: 90821


This tutorial model shows how to model a microspeaker located in a smart phone including the radiation through and interaction with the acoustic port that connects to the exterior. The model demonstrates a linear frequency domain analysis as well as a nonlinear time domain analysis.

A lumped electrical circuit is used for the electromechanical representation of the microspeaker (a classical Thiele-Small model). The circuit is coupled to the acoustic domain using the built-in Lumped Speaker Boundary feature.

In the frequency domain, the (linear) response of the system is analyzed for a range of frequencies from 100 Hz to 10 kHz. In the time domain, the distortion and additional nonlinear resistive losses associated with acoustic-generated vortex shedding at the port are modeled. Here the Nonlinear Thermoviscous Acoustic Contributions are added to the Thermoviscous Acoustics, Transient interface.

この model の例は, 通常次の製品を使用して構築されるこのタイプのアプリケーションを示しています.