ALTI Pavilion + Conference Presentations Schedule
Thanks to our Sponsors, our Conference Schedule is FREE of CHARGE this year!
Note that you must still purchase a pass from HIGH END Society for admittance to the exhibits and other show events.
This schedule is accurate as of the date of publication but may be subject to edits. Check back often!
Papers, Seminars, and Advertorial Abstracts
Hear how ADI are enabling the future of Hearable technology
By Matt Windmill
Hearables present an unprecedented opportunity for innovation at the convergence of personalized audio and wellness technology. The explosion of opportunities in the hearables space is being driven by a demand beyond ‘standard’ wireless headphones, such as personalized hearable computing, and rapid technological advancements in voice user interfaces and health monitoring.
Matt Windmill has 20 year experience in the Semiconductor Industry, most recently leading the Consumer Sales Team in EMEA at Analog Devices.
A lifelong passion for Music and audio dovetails perfectly with building partnerships and enabling ADI’s industry leading technology & solutions in the hearable and wearable space.
Currently studying for an Exec MBA at Aston Business School.
In this presentation, Kartesian Acoustic, the advanced and innovative French pro and consumer OEM designer-manufacturer, will unveil the ultra-high end vKi range and debut the world-class Wom185_vKi, perhaps the world’s most linear, low distortion midwoofer.
The vKi range is based on a new state of the art motor structure utilizing radial magnets and copper wells resulting in low and linear inductance, very long excursion, and very high force factor. Kartesian’s proprietary “dynamiK” spider yields constant Kms(X) and the “compound CGF” and “hexaKone” membranes increase cone rigidity by 10X while doubling the mechanical damping and maintaining low mass.
The presentation explains how Kartesian Acoustics utilizes advanced technologies integrated into the vKi platform to meet your most demanding OEM applications. Or, Kartesian can generate a “clean sheet” design with specific motor structure, custom cones/domes, surrounds, and spiders to meet your exacting application. Be sure to stop by the ALTI Pavilion for the Kartesian exhibit for one-on-one discussions about your next project.
https://www.kartesian-acoustic.com/
I
Clement Lambert is Kartesian company founder, and electro-acoustic expert working in audio industry for 15years. His passion for sound reproduction started when he listened a recording made by the music conservatory that he attended as a 9 year old. He was fascinated by this HiFi system and its ability to transmit emotion.
After he graduated in automated production systems, he decided to carry on his study in advanced mathematics and Engineering school. After his 1st job in the Aeronautic industry, Mr Lambert set-up his 1st company specializing in audio engineering, creating strong network with international prestigious brands and suppliers.
In 2019, he decided to create a production line in France and market the innovative products previously developed through distributors : Kartesian company was born. With Kartesian, Mr Lambert became an active member for audio world progress, and “vKi” technology introduced in this advertorial is perfect example.
Enhanced Perceptual Rub & Buzz Measurement for Production Line Use
Michael Trolle, VibrAkustik ApS
Perceptual distortion measurements are often considered the holy grail of end-of-line tests because rejecting devices with only audible faults increases yield. Although such measurements have been around since 2011, production line adoption has been slow because until now, sensitivity to background noise has made limit-setting challenging. In this paper, we introduce Listen’s new algorithm that uses proprietary technology to reduce the impact of background noise on the measurement and offer more repeatable results. This facilitates limit setting on the production line, and makes it a truly viable production line metric for increasing yield. Results from various algorithms will be shown, and their correlation to subjective and other non-perceptual distortion metrics explained.
Michael Trolle is CEO of VibrAkustik ApS, a European distributor for Listen Inc.
Since graduating with a BS in export engineering from the Technical University of Denmark, Michael has held a variety of technical, sales and marketing roles with Brüel & Kjær, DPA Microphones, and GRAS before founding VibrAkustik ApS and setting up a Danish office for Norsonic. Outside of work, Michael is a keen cyclist and is preparing for a 1.300 km (800 US miles) charity bike ride for charity from Denmark to Paris this summer.
2023 improvements in 3 programs from LOUDSOFT
By Peter Larsen
FINESuspension 2023
Calculate the combined Spider +Surround or 2 spiders Non-Linear FEA calc of Kms(x), Cms(x) and F(x) for the combination
FINEBox 2023
DIRECT High Power/Temperature calcs from dimensions Export of responses WITH Voltage and power levels
Bass Reflex response with MAX Boosting Max Flat ABR & C2S™ concentric coplanar stabilizer Designer (Dinaburg)
FINE DSP 2023
Frequency, Q and dB level for each Biquad EQ in main display Imported curves with precisely scaled SPL for high power levels Faster optimization due to optimized parameter ranges
DSP Bass Boost using Max Voltage curves from FINEBox Improved printing with all responses and DSP / Biquad data
Peter Larsen, B.Sc. EE. started his career with SEAS in 1974 and was Chief Engineer for Vifa-Speak 1979-1987. Thereafter Dynaudio 1987-1990 and JBL in USA until 1993.
From 1993 Peter Larsen has worked as an independent consultant for leading loudspeaker factories all over the world: Audax in France, KEF Audio in UK, Goldmax in China, Vifa-Speak in Denmark, Peerless Fabrikkerne of India, NXT in UK, Microlab in China, Apple in USA and many others.
During the period as an independent consultant Peter Larsen has specialized in in-depth analysis of loudspeakers and manufacturing techniques, research concerning new components and materials, advanced Acoustic Finite Element modelling, new measuring methods, novel speaker design concepts and development of several customized products (private label).
During the same period Peter Larsen has developed and marketed globally special FINE-software for speaker development and design.
Natural hearing with hearables and how active processing can shape human perception.
Hearables are becoming the smartphone of the ear. However, performing sophisticated signal processing in these small devices is challenging. In this presentation we will discuss different aspects of natural hearing with hearables . We will give an overview of the current benefits and artifacts that hearables offer and expose to users. Within this context, we introduce solutions to prominent problems in hearables as developed by researchers or by industry experts, such as Elevear. A competitive hearable product should provide many benefits while avoiding the artifacts. Finally, an overview of the principles to maintain, restore, or improve natural hearing, e.g., via hearing protection or hearing aid functionality, will be discussed.
Dr.-Ing. Stefan Liebich is one of the co-founders of the startup Elevear with the mission to “Elevate your Hearing”. Elevear’s technologies and algorithms shape the future of hearing with hearables and hearing aids. Their product portfolio focuses on active noise and occlusion cancellation, speech enhancement, and spatial audio. Stefan Liebich received various honors for his PhD and M.Sc. studies, including the Otto-Junker award as well as the and Wilhelm Borchers medal. Under the supervision of Prof. Dr.-Ing. Peter Vary, he worked on the topics of active noise and occlusion cancellation as well as the general perception of the own voice while wearing headphones or hearing aids. His work has been published in a vast number of renowned, international conferences and journal papers. Aside of his professional engineering career, he is a photographer and an active dance teacher for Forró, one of the most popular Brazilian couple dances.
C2S™️ The Concentric Coplanar Stabilizer for cohesive sound reproduction: A comprehensive approach
A Concentric Coplanar Stabilizer (C2S)™ is a technology used in loudspeaker design that aims to improve the accuracy and quality of sound reproduction. Work presented during this presentation will cover COMSOL modeling work that was done to compare currently available technology like PR vs C2S™ Technology and it potential use and benefits for current and future products.
Roger Shively is a co-founder and principal of JJR Acoustics (Seattle, WA). He has more than 35 years of experience in engineering research and development, with significant experience in product realization and in launching new products at OEM manufacturers around the world. Before co-founding JJR Acoustics in 2011, Roger worked as Chief Engineer of Acoustic Systems as well as functional manager for North American and Asian engineering product development teams in the Automotive Division of Harman International Industries Inc., a journey that began in 1986.
Roger received his degree in Acoustical Engineering from Purdue University in 1983, and finished post-graduate work in the field of finite element analysis. He is a member of the Audio Engineering Society (AES), Acoustical Society of America (ASA), and Society of Automotive Engineering (SAE). He has published numerous research papers and articles in the areas of transducers, automotive audio, psychoacoustics, and computer modeling. Roger also holds US and International Patents related to the design of advanced acoustic systems and applications, particularly in the field of automotive audio. Roger is Co-Chair of the AES Automotive Audio Technical Committee.
Ferrofluids – characterization, material properties, application impact in Loudspeaker Drivers
The presentation gives an overview over the company Ferrotec and it’s product range, brief outline of the history of ferrofluid. The ferrofluid characterization and classification is explained, the field of applications and the composition are shown. The application of ferrofluid in speakers and it’s effects are explained. The selection process for a matching ferrofluid and the requirements are explained. The product development over the years and the efforts and improvement are shown.
Joachim Schwender has worked for Ferrotec since 1993 as Sales Engineer and Product Specialist Ferrofluid for region Europe. He is responsible for all applications for ferrofluid including speakers.
New OEM 180° Bay Radial Speaker (BRS)
By Mark Beach of Beach Dynamics
The presentation will discuss the licensing and unparalleled performance of the new OEM 180° Bay Radial Speaker (BRS) which borrows technology from the 360° BRS (fully omni and flat to 50 kHz). The 180° BRS (500 Hz – 20 kHz) will exhibit the same low distortion, excellent sensitivity, and easy-to-drive load yet can be scalable with sensitivities from 90 to 120 dB. The presentation will discuss easy outsourcing FEM modelling to meet various specifications, simplified and automated manufacturing, and various sources for complete drivers. Attend this presentation to learn how to improve your product line with the newest and best available technology.
Mark Beach is President of Beach Dynamics, ALTI Vice-President, member of the Board of Directors, and ALTI- EXPO in Orlando as well as ALTI Pavilion+Conference in Munich Content Chair
Designing BAYZ Audio’s latest radial tweeter using COMSOL Multiphysics
By Dr. Arpad Forberger
In 2017, Bayz Audio introduced the first version of its Bay Radial Speaker (BRS), which is a truly revolutionary tweeter. Its development owes to numerous years of research and development. In many ways, BRS goes against the grain when it comes to traditional acoustical engineering.
Now its next iteration is set to come alive through the use of advanced COMSOL acoustic modeling, which includes all the physics that comes into consideration from structural deformations, magnetic field calculations, coil design, and how it is coupled to acoustics. This multiphysics model allows us to run several iterations with various membrane materials and shape configurations. Via all of these a linear response can be achieved in the 500-20,000 Hz range and beyond.
The result is one of the most technologically advanced tweeters ever.
This new tweeter delivers “incredible accuracy, smoothness, and directivity” to manage vocal audio range and facilitate smooth treble.
Apart from its technical parameters, a simple and cheap production technology generating reliable and easily reproducible components make this new technology particularly intriguing.
Everything about this tweeter has been modeled, designed and simulated from scratch in close cooperation with Bay Zoltán. The end result is a high performance, high power-handling tweeter, with high-level and scalable efficiency (90-120dB), no breakup mode and with excellent bandwidth, linearity, and low distortion.
Dr. Arpad Forberger received his MSc in Mechanical Engineering from the Budapest University of Technology and Economics (BME), focusing on applied mechanics. He started his PhD program, focusing on using and researching new material models for polymeric flows. He worked as part of a larger team calculating reactions in commercial tractors.
In recent years, Arpad has worked as an application engineer at Gamax Laboratory Solutions, focusing on enabling our partners to accelerate their innovation cycle in technical computing, model-based design, and multiphysics, including technical support of license configuration and product use, as well as the support of R&D projects in multiple sectors, including Automotive, Transport, Oil & Gas, and technical services. His knowledge is also an important asset in helping our partners in Education to adopt modern technical computing tools.
Engineering Thin-ply Carbon Diaphragm (TPCD) Speaker Cones to Control Resonances
By Martin Turesson
Composite Sound’s vision is a Thin-ply Carbon Diaphragm (TPCD) enabling the transformation of the audio signal going into the diaphragm, to sound going out of the diaphragm without changing it – the diaphragm should ideally not distort, add, or remove information.
The key is to control the resonances. Instead of trying to reduce the negative effects of undesired resonances, our philosophy is to control what is causing them. By tailoring stiffness and thickness in different parts of the diaphragm, the modal behavior can be optimized for controlled resonances.
Martin Turesson is Head of Thin-ply Carbon Diaphragms (TPCD) at Composite Sound. While working for Oxeon AB – the company behind TeXtreme thin-ply carbon materials – Martin started to explore the potential of using TeXtreme in speaker cones and diaphragms. This led to the creation of a new category of speaker cones and diaphragms – Thin-ply Carbon Diaphragms (TPCD). Based on the technical and commercial success with TPCD, Oxeon spun-off the audio related business into Composite Sound in 2021.
Martin has a master’s degree in mechanical engineering from Chalmers University of Technology in Gothenburg.
Optimizing the Dinaburg C2S™ in FINEBox
By Peter Larsen
Using LOUDSOFT’s programs, you can optimize Dinaburg’ s C2S™ so that it achieves more advantages than other known technology in the right environment.
The special Coplanar Concentric Stabilizer from Dinaburg (C2S™) can be designed and optimized in a powerful bass system using FINEBox from LOUDSOFT. The C2S™ can be modeled and optimized directly in the software, where SPL, Xmax, and bass extension are accurately predicted.
The linearity and geometry of the C2S™ suspensions can easily be optimized from templates using the FINE Suspension software.
The simulated responses and excursions of the C2S™ system may be exported into FINE DSP, where the maximum boosted SPL and bass response is predicted using DSP boosting and LF limiting.
See Peter Larsen’s Biography above