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在过去的10年中,大多数发动机的法规主要涉及到废气排放,而发动机的另一副产物——噪声——也很快受到发动机和设备制造厂家的重视。在北美和欧洲的一些国家和专门委员会已制定了一些允许达到的环境和操作者听觉的噪声专门法规,而在前几年这些标准却是比较难以实现的。 目前,许多公司已研制出用于降低发动机运行噪声的各种系统,而美国噪声消除技术公司(NCT)所研制的电子消音器系统颇具新意,并已获得专利。最近,NCT与DDC已达成协议,由DDC通过他的销售网出售该公司的噪声消除系统。据DDC介绍,该技术可用于建筑、工业、发电机组、军事、船舶和高
In the past 10 years, most of the engine regulations mainly related to exhaust emissions, while another by-product of the engine - noise - was quickly taken seriously by the engine and equipment manufacturers. In North America and Europe, a number of countries and special committees have enacted specific regulations that allow for environmental and operator audits of noise that have been more difficult to achieve in the past few years. At present, many companies have developed various systems for reducing engine operating noise. The electronic muffler system developed by NCT has been quite innovative and has been patented. Recently, NCT and DDC have reached an agreement that DDC will sell the company’s noise cancellation system through his sales network. According to DDC, the technology can be used in construction, industrial, generator, military, ship and high