Active Acoustics Innovations Supported by Tuning & Prediction Tools
The must attend event for all decision makers and experts in automotive electronics and SW industry
Bonn Germany Oct 20 – 21
Booth 183
Our leading speaker, presenting Silentium state of the art technology, Mr. Ziv Hermon PhD – Electric Innovation Oct 20th at 17:15
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Noise cancellation has become more than just a luxury in automotive. Health-focused consumers now demand products that prioritize occupant safety and wellbeing. The adverse health effects of noise on drivers and passengers have long been recognized. Removing unwanted sound and creating a more pleasant acoustic environment will become a point of brand differentiation – and eventually a legislative requirement. These new Active Acoustics innovations support all megatrends from electric to autonomous, connected and shared driving.
Active acoustics technologies continuously create appropriate destructive acoustic fields to reduce unwanted engine, road, HVAC and wind noise in passenger compartments. This is usually done by leveraging the loudspeakers of the existing audio system and by placing a set of sensors on the chassis and inside the headliner or the seats. The Active Road Noise Cancellation technology in JLR vehicles, for example, lowers unwanted noise peaks by 10dB and overall noise levels by 3-4dB – the equivalent of reducing the volume of the car’s sound system by four levels. The Quiet BubbleTM technology can create an almost physical space around 1ft in diameter around each occupant’s head, which allows the driver or passengers to experience a quieter environment in their seat specifically. In the next generation, this will be expanded into the “Personal Sound BubbleTM” technology, where passengers can listen to their own music without it overlapping with other occupants’. For example, the driver can be listening to navigation instructions while the passenger listens to their own music or a podcast.
Given the diversity of vehicle variants and the sensitivity of the performance of active acoustics to the locations and types of sensors and speakers used, computer aided design (CAD) tools play an important role in vehicle development. Instead of a tedious trial and error optimization process, a CAD tool can perform automated evaluations to achieve several optimal configurations. The Active Acoustics simulation tools replace in-vehicle lengthy and costly measurements and evaluate the acoustical energy level at targeted points in the vehicle.
In this work, a CAD & cloud tool to support integration of active acoustics solutions into vehicles is discussed. The objectives are to provide automotive designers with:
- Rich libraries of sensors and loudspeakers.
- Design flexibility to optimize the number and the locations of the sensors.
- Detailed studies of acoustic performance in terms of acoustic parameters.
- Quantitative evaluation of the acoustic comfort.
- Evaluation of the acoustic performance and comfort under diverse environmental conditions.
- Integrity check routines to support diagnostics for development phases, end of line (EOL) production phase, and dealer support.
- Employing an NVH-focused CAD system upfront, development teams can test and enhance acoustic performance at all stages of the design process.
Degree of innovation
High – new product in automotive. V1 of Active Acoustics CAD & cloud system is available and in use in several car models starting 2021. Additional V2 features like the personal sound bubble TM, sound management and sound creation are in development.
Publications
Profile of the lecturer
Mr. Ziv Hermon Ph.D. our CBO (Chief Business Operation) with a track record of 20 years in innovation management. Former science and innovation manager of General Motors Israel.
For more information visit: https://www.vdiconference.com/eliv/
