Acoustic analysis is one of the very important analyses in product development to demonstrate its original performance and maintain quality image.
<Acoustic Analysis in Engineering> There are various sounds around us, and sometimes we find those sounds unpleasant. When unexpected noise is generated by a machine during its design phase, that machine is unable to fully exhibit its original performance, with part of its performance being lost as energy that produces sound. Furthermore, the presence of that sound can tarnish the image of the machine's quality. Additionally, not only noise but also the ability to deliver pleasant sounds tailored to user preferences, as seen in audio equipment, contributes to the brand image of the product. Therefore, acoustic analysis is one of the very important analyses in product development. <Examples of Acoustic Analysis> Acoustic analysis is utilized in many industrial products, ranging from acoustic devices such as speakers and microphones to the noise generated by cars, trains, and airplanes, as well as phenomena where the noise emitted by rocket engines during launch can damage satellites within the payload.
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◆Procedure for Acoustic Analysis - Creation of CAD data - Creation of finite element mesh and analysis settings - Execution of calculations - Processing and analysis of calculation results ◆Points to Note for Acoustic Analysis - The size of the mesh (element size) to be used for analysis depends on the wavelength. - There are recommended conditions for infinite boundary elements as well. *For more details, please visit the website.
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◆Improvement of sound quality by reducing pop noise generated by the microphone during recording When recording, breath from the mouth can hit the microphone forcefully, causing noise such as "pop" or "zap." This is referred to as pop noise. To address this phenomenon, we can utilize fluid simulation to examine microphone mesh shapes that do not cause sudden changes in pressure. ◆Performance evaluation of soundproof walls Creating physical soundproof walls to evaluate their sound insulation performance can be time-consuming and costly. By constructing a sound field model of an open space and evaluating the soundproof walls being developed virtually, we can achieve a reduction in development time and costs. ◆Cabin noise (road noise) generated by inputs from the road surface during vehicle operation When a vehicle is in motion, the road surface exerts vibrational forces on the tires, causing various parts of the vehicle body to vibrate. This vibration generates noise (road noise) inside the cabin. By creating a simulation model of the vehicle body structure and the acoustic space within the cabin, we can evaluate road noise virtually, allowing us to examine the necessary suspension geometry, bushing characteristics, or the resonance characteristics of the vehicle body panels to reduce road noise.
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Elements of Infinite Boundaries and the Behavior of Sound Waves
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Acoustic analysis of microphone net shape
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Altair is a global company that provides software and cloud solutions in the fields of product development, high-performance computing (HPC), and artificial intelligence (AI). We offer technology that enables our customers across diverse industries to create a sustainable future and thrive in a connected world. For more details, please visit www.altairjp.co.jp.