Saint-Gobain Technical Insulation’s Post

In the first installment of our acoustics Q&A series, Robby Deem, our acoustics and vibration discipline leader, delves into the key trends shaping the future of acoustics design. From the impact of embodied carbon to the challenges of mass timber and adaptive reuse, this article offers a deep dive into how we’re pushing the boundaries of acoustic engineering to enhance the built environment. Discover how we're making a difference and stay tuned for more in this series. Learn more at: https://lnkd.in/gFKMDXCw #teecom #acoustics #acousticalconsulting

In our acoustics lab, we will collect the responses of test subjects while exposing them to sounds and vibrations. Using recordings of real buildings in operation, we can compare and investigate which building types and features disturb users the most and trigger a strong physiological response. We do this in our overall quest to understand what is relevant for a healthy, productive and restorative built environment! In this article, we present how to accurately record and reproduce vibrations, which is a challenge in itself.

Dear colleagues, I am really pleased to share with you the publication of this article in Buildings Acoustics Journal. The research examines the sound absorption properties of potassium polyacrylate (PPA) composites enhanced with clay and porous hollow glass beads in a hydrogel framework. This material combination shows promise for noise control in industries like acoustic engineering and construction. The study measured the sound absorption coefficient to assess the material’s ability to absorb sound energy at different frequencies. Incorporating clay and porous beads adds complexity, necessitating precise acoustic performance predictions. Data from these measurements trained an Artificial Neural Network (ANN) model, which learned to predict sound absorption coefficients for various composite configurations. This model aids in customizing composite acoustic properties, streamlining material design and optimization. Integrating ANNs improves accuracy and accelerates the development of innovative, customizable sound-absorbing materials for industrial applications. I want to thank the other authors: Büşra Şimşek, Prof. Gino Iannace, and Prof. Ozmen Mustafa. https://lnkd.in/dv85y2j8

Researchers from the Massachusetts Institute of Technology (including the MIT Institute for Soldier Nanotechnologies), the University of Wisconsin-Madison, Case Western Reserve University, and the Rhode Island School of Design have developed a #sound-suppressing #silk #fabric that could be used to create quiet spaces. The fabric, which is barely thicker than a human hair, contains a special #fiber that vibrates when a voltage is applied to it. The researchers leveraged those vibrations to suppress sound in two different ways. In one, the vibrating fabric generates sound waves that interfere with an unwanted #noise to cancel it out, similar to #NoiseCanceling headphones. In the other, the fabric is held still to suppress vibrations that are key to the transmission of sound. This prevents noise from being transmitted through the fabric and quiets the volume beyond. https://lnkd.in/ga5ySCVJ (Work funded by the National Science Foundation (NSF) and the United States Department of Defense) Yoel Fink

Ever walked into a room that just didn’t feel right? Maybe it was too noisy, conversations felt hard to follow, or you sensed an uncomfortable pressure in your ears 🤔💥. Believe it or not, the acoustics of a space play a huge role in how we feel. What causes this discomfort? ❗ External noise ❗ Internal noise ❗ Poor room acoustics Want to learn how to measure and reduce these issues? Find out more on https://lnkd.in/ep7XXami #ntiaudio #acoustics #solutions

What is the ideal shape of a reverberation room for sound absorption testing (#ISO354)? This question has kept Paul Didier, Cédric Van hoorickx and myself busy during an exciting research project funded by the European Research Council (ERC) and ROCKWOOL Group. 🤔 It had already been demonstrated that the diffuse field sound absorption is an appropriate target reference value, as it represents the average performance of an absorber across a wide range of practical situations, also at very low frequencies (when properly accounting for nearfield anisotropy). But since the variance across rooms of different shape is large at low frequencies, can reverberation room designs be found in which the measured low-frequency absorption is very close to the diffuse reference value? 📣 This has been investigated through the development of a numerical framework, which enables to optimize parameterized room shapes so as to minimize the difference between the diffuse reverence absorption and the absorption as measured in the room. The latter was simulated using a detailed, experimentally validated finite element model. It was found that 👉 there are multiple hexahedral room shapes that perform very well, yielding substantial design freedom; 👉 some cuboid rooms with specific length:width:height ratios (1.9:1.67:1 and 1.4:1.65:1) also perform quite well; 👉 although a single potent reference absorber sample was employed for the optimization, most optimized designs maintain their performance across a range of samples and sample dimensions, and they are robust to small changes in room geometry; 👉 more simple optimization strategies aiming e.g. at a homogeneous repartition of natural frequencies of the empty room, did not result in good performance. The complete study has been published in Applied Acoustics. Use the following link to get temporary free access: https://lnkd.in/eJwqSKZi . 🙏 We hope that these outcomes and the developed methodology will help not only in improving the reproducibility of absorption testing across laboratories, but also in ensuring that the values obtained are representative for their average performance in practice. Thank you Mads Bolberg and Rasmus Gottrup Barfod for the great discussions and feedback!

Further to the post I shared on measuring acoustic absorption. Good training for our team, distributors, and competitors. In-Situ reflection vs Absorption (reverberation room) - it is not a battle of which is best. They're measuring two different things. What is the simple difference between "absorption" and "in-situ reflection" and why is this useful?   1. In-situ REFLECTION readings are most appropriate where there is a direct sound field - for example from a train, to a noise barrier wall in a flat field….  It measures the immediate effect of soundwaves hitting a surface. The more open the space, the more relevant this is to an acoustic expert. It would be more relevant in an open field with noise barrier walls that are far apart. It would also be very good to pay more attention to this data on a construction site for hoardings, or on an outdoor shooting range.   2. ABSORPTION (from an accredited reverberation room test) is applicable in room acoustics, in a diffuse sound field where the sound is coming from everywhere. Focus on the term "Room acoustics".... yes it includes a “room”.... the more enclosed a space.... the more room like, the more relevant this measure will be to an acoustic expert. It may also be relevant on viaducts, ramps, and tunnel portals or in a field where noise barrier walls are very close together and things are more or less partially enclosed.   Why is In-situ useful? Measuring a wall in the field, as it stands, with running traffic most closely reflects reality. For absorbers, it is the best method for measuring acoustic life or functional working life of an acoustic material because it can be measured in place and during running operation and again after a period of aging. We can now quickly verify through benchmarking whether certain products continue to work as designed; we can measure condition; and we can measure whether they need replacing.... For SEE, we have products to appeal to both in-situ, and diffuse sound fields. And the elephant in the room …. Acoustic working life….. Whisper NB has an acoustic working life of at least 50 years according to EN 14389-1-2, and this validation is proven with in-Situ reflection testing.

CMS Danskin Acoustics have an exemplary track record when it comes to researching, conceiving and implementing industrial soundproofing solutions. Whilst residential and commercial soundproofing certainly has its challenges, the levels of noise involved are relatively low. It goes without saying that industrial noise tends to be on another level altogether. Our acoustic solutions cover both sound transmission and sound absorption requirements. At around 85dB (roughly the noise generated by a pneumatic drill), you are likely to experience discomfort. As little as eight hours of continuous exposure to this level of noise can result in permanent damage to the inner ear, which is why 85dB is the Upper Action Level set in the Control Of Noise at Work Regulations. At 100dB, just fifteen minutes of exposure can cause permanent damage. And at 110dB the exposure time drops to around a minute before harm is inflicted. Pain is experienced at 125dB and hearing loss can be permanent. At 140dB or above not only is the damage permanent, it is also immediate. Our Technical Range of products include but are not limited to: * Acoustic Lagging * Acoustic Barriers and Damping Sheets * Acoustic Foams * Industrial Acoustic Wall Linings * Enclosure Panels Call the experts on 01925 577711 or email the team on technicalinsulation@cmsdanskin.co.uk https://lnkd.in/ejTBEYnq Technical & Specification Team: Paul Absolon Andrew Hayes Jamie Church Kirsty C. New Product Development: Mark Atkinson Andrew Turner Karen Berridge Technical Sales: Mark Metcalfe David Bowen Beverley Reid Olivia Minett Fiona Kerr Kirstie McWilliams Judith MacKay Lorraine Pearson Ian Bull Leon Wood Ricky Hill Kitsons Technical Supplies #cmsdanskin #acoustics #acousticsolutions #technical #specification #industrial #testdata #trustedpartner #trustedsupplier #hvac #ductwork #pipework #experts

"Unveiling the Secrets of a Professional Acoustic Report" In the realm of sound engineering and architectural design, the importance of a professional acoustic report cannot be overstated. Let's dive into what makes such a report indispensable and how it can elevate projects to new heights of excellence. Key Elements of a Professional Acoustic Report: - Site Evaluation: The report starts with a comprehensive evaluation of the site, considering factors such as ambient noise levels, architectural features, and intended use of the space. - Noise Control Measures: It outlines noise control measures tailored to the specific project, including soundproofing materials, acoustic treatments, and structural modifications. - Audio System Design: A professional acoustic report delves into the design and optimization of audio systems, ensuring optimal sound quality and coverage. - Environmental Impact: It addresses the environmental impact of sound, including potential noise pollution mitigation strategies. Regulatory Compliance: The report ensures compliance with industry standards and regulations, such as ANSI/ASA standards or local building codes. - Simulation and Modeling: Utilizing advanced simulation and modeling techniques, the report predicts sound behavior in different scenarios, aiding in decision-making and risk mitigation. Now what are the benefits of a Professional Acoustic Report: * Enhanced User Experience: By optimizing acoustics, the report contributes to a superior user experience, whether in concert halls, offices, or residential spaces. * Increased Productivity: In work environments, proper acoustic design can boost productivity by reducing distractions and improving concentration levels. * Compliance and Risk Management: Meeting regulatory requirements mitigates legal risks and ensures long-term sustainability of the project. Investment Protection: Proper acoustic design protects investments in audio equipment and infrastructure, prolonging their lifespan and performance. "Case Study Highlights:" Include a brief case study or success story showcasing the tangible benefits of a professional acoustic report. This could be a project where the report significantly improved sound quality, reduced noise complaints, or enhanced the overall atmosphere of the space. In conclusion, a professional acoustic report is not just a document; it's a roadmap to sonic excellence. By leveraging the insights and recommendations of such a report, projects can achieve unparalleled sound quality, compliance, and user satisfaction, and also can be used as proof of work document. #AcousticDesign #SoundEngineering #ProfessionalReports #ArchitecturalDesign #NoiseControl #UserExperience #Compliance #CaseStudy