PIETER SIJTSMA ADVANCED AEROACOUSTICS BV

Their core work

PSA3 is a Dutch SME specializing in aeroacoustics — the science of noise generated by aircraft engines and airframes. They focus on computational and experimental methods for predicting, modeling, and reducing noise from ultra-high bypass ratio (UHBR) turbofan engines, which are the next generation of quieter, more fuel-efficient aircraft powerplants. Their work spans high-fidelity acoustic simulations (LES, CAA), engine acoustic testing, and the development of low-noise design solutions for aviation. The company name itself signals deep personal expertise — likely founded by an individual specialist with a strong track record in the field.

What they specialise in

How they've shifted over time

PSA3's earliest project (ADAPT, 2017) focused on aeroacoustic processing techniques — foundational measurement and data analysis methods. By 2020, both CIRRUS and AMICAL shifted toward high-fidelity simulation and noise reduction for next-generation UHBR engines, indicating a move from measurement-oriented work to predictive modeling and design optimization. This progression suggests PSA3 has built up from acoustic analysis capabilities toward offering simulation-driven noise reduction solutions for the latest engine architectures.

PSA3 is moving toward high-fidelity computational methods for next-generation quiet aircraft engines, positioning them well for future Clean Aviation and noise certification projects.

How they like to work

PSA3 participates exclusively as a specialist partner — never as coordinator — which is typical for a small expert firm contributing deep technical know-how to larger consortia. With 11 unique partners across only 3 projects, they work in moderately sized teams and appear to bring niche acoustic expertise that larger aerospace players need but don't have in-house. Their participation in Clean Sky 2 (CS2-RIA) projects indicates they are trusted within the European aerospace JTI ecosystem.

PSA3 has collaborated with 11 distinct partners across 2 countries through 3 projects, all within the Clean Sky / aviation JTI framework. Their network is focused rather than broad, centered on the European aerospace acoustics community.

What sets them apart

PSA3 is a rare breed: a micro-SME with highly specialized aeroacoustics expertise operating in a field dominated by large aerospace corporations and university labs. Their value lies in offering deep, focused acoustic simulation and analysis capabilities without the overhead of a large organization. For consortium builders, they fill the niche expert role that reviewers love to see — a specialist SME bringing targeted capability to complement the big players.

Highlights from their portfolio

• CIRRUS
  Largest funding (EUR 130,375) and most technically detailed — targeting core noise reduction in next-gen UHBR engines using LES, CAA, and acoustic liner solutions.
• AMICAL
  Focuses on advanced modeling for UHBR fan noise with high-fidelity simulations, representing the company's push into predictive design tools for quieter engines.