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１引言 有源护耳器是有源噪声控制技术发展中最早进入市场的产品，也是目前该领域最成熟的应用。ＩＳＯ／ＴＣ４３声学技术委员会也已经将有源护耳器的产品标准列为０阶段项目，正式成立了工作组。国际上多家大型电声与噪声控制企业的积极介入，迅速推进了这一进程。如美国的Ｂ
1 Introduction Active ear protectors are the earliest products to enter the market for the development of active noise control technology and are the most mature applications in this field at present. ISO / TC43 Acoustics Technical Committee also has the active ear protector product standards as a 0 phase project, the formal establishment of a working group. The active involvement of many large-scale electro-acoustic and noise control enterprises in the world has rapidly pushed forward the process. Such as the United States B