Acoustical Design of a Bluetooth Earphone Using Simulated Annealing Optimization

Abstract

Faced with various conflicting issues arising from sensitivity, bandwidth, and miniaturization requirements for Bluetooth earphones, it is desirable to develop a systematic way to attain a design that would meet these requirements. Based on a lumped-parameter model, the design of the earphone enclosure is optimized using the simulated annealing (SA) algorithm. Experimental results obtained using a type 3.3 ear simulator, the IEC 60318-4 (which supersedes IEC 60711 in 2010), reveal that the optimized design has resulted in a significant performance enhancement, complying with the frequency response mask dictated in the 3GPP2 standard.