Category - Noise & Vibration

20
Apr

Understanding Automotive Engine Noise

One of the most significant pressures on car manufacturers today is sound quality. There are many factors that engineers must consider when analyzing the sound emitted by a car. Aside from being a marketing tool, there are now government regulations on sound. New developing technologies including hands-free mobile and speech recognition require the clear voice ...
18
Apr

Acoustic Simulation for Spacecraft Launch

Launching a rocket into the sky is not an easy thing. There are several thousands of unimaginably complex engineering processes occurring in the background, the competition is getting tougher every day, and companies frequently only have one chance to get the launch sequence right. So what is hindering efforts to launch more powerful rockets in ...
14
Apr

Automotive Noise Optimization with Simulation Software

Using Simulation Software to Predict Automotive NVH   One of the most pressing challenges for today’s automotive manufacturers is to make lighter cars. A lighter car will maintain a lower level of gas consumption and thus is more eco-friendly. To achieve this goal, many companies switched from aluminum to composite materials and put smaller engines ...
13
Apr

Identifying the Acoustic Contribution to Interior Noise

The aerodynamic sources acting on a car side window, generally defined as the small wavelength sources such as turbulent eddies and boundary layer structures, are generally much larger in amplitude than the acoustic sources, those with longer wavelengths. So naturally you would expect that the aerodynamic sources have a much greater contribution on vehicle interior ...
12
Apr

Tuning Acoustic Quality of Audio Devices with Simulation

  When designing an audio device, the most important thing for an engineer to consider is the quality of the sound. Quality is what makes the device valuable and differentiates it from competitors. Audio device manufacturing companies experience extremely high product development costs due to repetitive and expensive physical testing. In addition to the need ...
23
Mar

Identifying and addressing vibration issues early in the design process

A universal problem when optimizing noise and vibration is that it often conflicts with durability or cost. Multi-body dynamics helps balance these competing requirements early in the design process by addressing key vibration issues facing engineers, such as “will excitations in one part of the systems interaction with another part of the system?” MBD makes ...
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