噪音和振动阻尼（第1部分）

Buzz, squeak, and rattle (BSR), a term frequently used by automotive engineers, refers to the incessant noise or unwanted squeaky sound that you hear in your car at times. While BSR remains one of the most common, yet challenging problems of the automotive industry, it is also of paramount importance in other industries including electronics, aerospace, and appliances. BSR can be caused by any moving components or the improper bonding and attachment of two parts. Whether it’s a cooling fan, medical pump, or washing machine, moving components within a device often causes friction, damaging the parts over their lifetime. In addition, devices, especially hand-held and portable ones, are prone to severe impact by a sudden hit or drop on the floor. Minimizing noise, vibration, and harshness (NVH) is critical to the optimal performance and longevity of any device. In the past, the issue of NVH was addressed by inserting a piece of neoprene or rubber between two com­ponents, held together by a screw, nut, or bolt. While this solution helps to reduce vibration, the mechanical fasteners create a rigid bond that is susceptible to cracking or breaking on impact. More recently, engineers often try to attack the problem of vibration at the source, which is commonly known as vibration isolation. However, in cases where isolation is not possible, the issue is resolved by introducing noise and vibration dampeners. The dampeners essentially absorb the noise and dissipate it over the surface, thus mitigating fatigue, stress, and vibration. Finding the right noise-blocking solutions can not only improve device quality, but also enhance the end-user experience. Fortunately, companies such as Boyd, 3M, and Rogers Corporation have opened doors to multiple acoustic management solutions in the form of acoustic foams such as SOLIMIDE® Foams, tapes, and adhesives. In addition to replac­ing mechanical fasteners, these solutions exhibit high resiliency and shock absorption characteristics. This cost-effective approach to acoustic damping offers the following advantages:

• 将噪音、振动和声振粗糙度降至最低
• 减少嗡嗡声、吱吱声和嘎嘎声
• 表现出高粘弹性、弹性和尺寸稳定性
• 允许快速简便的应用
• 提高设备的耐用性和性能

While each application requires a customized solution, there are certain product families that are predominantly utilized by Boyd to resolve noise and vibration de­sign challenges. To learn more about these noise and vibration solutions, stay tuned for our next blog.