Analysis of acoustic transmission loss and radiated sound
The muffler, represented by the automotive exhaust silencer, refers to a silencer (or silencer) installed in a part of the duct that serves as a passage for sound and fluid. The sources of noise from this muffler can vary, but it often seems to be related to the explosion sounds from the engine and the relatively low-frequency sounds that accompany it. To accommodate these low frequencies, the design incorporates acoustic elements such as expansion type, resonator type, branch pipes, and expansion resonance type that can resonate at low-frequency ranges, along with interference type, absorption type, and resistance type acoustic elements that are effective over a wide frequency range or in the mid to high frequency range. - The importance of coupled analysis considering acoustic transmission loss and sound propagation to external areas - For the design of automotive mufflers with high sound attenuation performance If you are interested in acoustic design, please take a moment to read this. Free download of materials ⇒ https://www.idaj.co.jp/whitepaper/0015/form.html
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There is a growing recognition that sound, which can be heard without conscious awareness, is one of the important factors that determine the added value of a product. In response to this, as CAD and CAE technologies develop, the demand for acoustic analysis has been increasing year by year, and many software solutions for acoustic analysis are being sold to solve various challenges. Will implementing such software resolve all issues? In reality, correctly operating the software requires advanced experience and skills. For example, it is necessary to convert various parts and materials into models suitable for acoustic analysis, determine the parameters used in those models through measurements, experiments, or estimations, and input them into the software. Additionally, inspections for validating the analysis or understanding the current state of the product often require measurements or experiments, and knowledge of experiments and measurements is essential to make acoustic analysis meaningful. At IDAJ, we offer a variety of acoustic engineering services centered around CAE for such acoustic design. Experienced specialists in acoustic analysis will assist you in solving your acoustic-related challenges.
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We propose appropriate solutions after hearing the challenges from all companies and engineers that require acoustic analysis. Acoustic Design Examples - Example 1: The impact of sound bridges in double walls - Example 2: Evaluation of sound insulation performance of a soundproof package designed for a generator - Example 3: Noise countermeasures for Universal Mist (MUM602) - A comparative study of numerical acoustic analysis and acoustic measurements - Example 4: Muffler noise reduction design - Analysis of acoustic transmission loss and radiated sound
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While focusing on MBD and CAE technologies and their surrounding technical areas, we specialize in building virtual products and collaborative design processes through cutting-edge digital engineering. We form partnerships with leading-edge software vendors of the era, providing a comprehensive engineering environment necessary to solve our customers' increasingly diverse and complex challenges using top-level domestic digital engineering technologies, including thermal fluid analysis, structural analysis, electromagnetic field analysis, acoustic analysis, system simulation, optimization technologies, embedded software development environments, and simulation process data management (SPDM) solutions.
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