b'Engineer Innovation | White Goodsthousands of dishwashers a day, saving one cent per unit on acoustical material could mean huge savings in cost. Knowing where the main noise leaks are located will tell you where you need to modify the design. The fastest way to find noise leaks is by using an array-based sound source localization technique, such as the one offered by the Simcenter Sound Camera System. Real-time holograms show the acoustical hotspots, as well as the critical frequencies. Very similar to an infrared camera (where designated colors indicate the zones with higher temperatures), the Figure 2: Sound Camera sound camera shows you where the highest noise levels are originating from.Understand the noise pathInstead of looking where the noise leaks out, another strategy can be to tackle the problem from inside. A washing machine has a lot of moving parts: rotating motors and belts, springs that hold the tumble, etc. They either generate vibrations and induce noise (the sources) or amplify certain frequencies (the transfer paths), such that an unexpected noise problem might occur (the receiver end). Our source transfer receiver approach will help you understand the underlying dynamic phenomena.All components are identified and characterized as a function of their dynamic behavior. Understanding their interaction and knowing the critical frequencies and paths will help determine the guilty component you should be working on. This systematic approach can be started in a very simple manner by using impact testing and looking at transfer functions. Much more detailed insights on the complete dynamic behavior of your products can be obtained with Simcenter Testlab Transfer Path Analysis (TPA).Figure 3: Hotspots Recording Shape the noisealternative, room-based testing setupsSome manufacturers of home appliances (ISO354 and ISO140) provide the samego even one step further: once they have absorption and transmission loss curves. the noise levels well under control, they start to examine how their equipment Once you select the optimal material,sounds and whether this sound is knowing where to apply it is next. It isappreciated by the end-user. The not efficient to place the acousticalbeeping sound when pushing the start material on all panels. A better approachbutton, the opening and closing of the is to find the locations where such adoor, and the splashing sound when the material is most effective. If you producewashing machine does the laundry is all 56'