Acoustic analysis is one of the very important analyses in product development to demonstrate the original performance and maintain the quality image.
<Acoustic Analysis in the Field of 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 demonstrate its original performance, with part of its performance being lost as energy used to produce sound. Furthermore, the presence of that sound can tarnish the image of the machine's quality. In addition to noise, the brand image of a product is also shaped by whether it can deliver pleasant sounds tailored to user preferences, as seen in audio equipment. Therefore, acoustic analysis is one of the crucial analyses in product development. <Examples of Acoustic Analysis> Acoustic analysis is utilized for many industrial products, ranging from acoustic devices like speakers and microphones to the noise generated by automobiles, trains, and airplanes, as well as the phenomenon where 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 our website.
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Applications/Examples of results
◆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 Building actual 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, vibrational forces act on the tires from the road surface, 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 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 panels to reduce road noise.
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Behavior of Infinite Boundary Elements and 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 a diverse range of industries to create a sustainable future and thrive in a connected world. For more details, please visit www.altairjp.co.jp.