At GRAS, customization is in our DNA — over 50% of our products are born from specific customer requests

Enabling precision sound and vibration testing tailored to your specific needs.

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Why Customization Matters

Testing demands are rapidly evolving. With increasing complexity in acoustical setups, standard microphones aren't always enough. GRAS offers tailored solutions that keep pace with innovation — without compromising on performance, durability, or quality.

Our Customization Process

Understand
We start with your requirements — environments, geometries, acoustic performance, and standards — and explore what success looks like for you.
Design & Prototype
Our engineering team creates a tailored concept and a working prototype for iterative feedback and validation.
Test & Deliver
We thoroughly test all custom solutions to meet or exceed specifications before seamless delivery and integration support.

Proven Across Industries

Automotive NVH Testing
Consumer Electronics
Aerospace & Defense
Medical Device Acoustics

Whether you need high-pressure microphones or ultra-slim profiles — we’ve done it before and we’ll do it again for you.

“For us it is important to use microphones that meet our strict requirements. After all, this will be the equipment that lays the foundation for our work.”

“The only limitations should be the environmental noise floor, not the microphone noise floor. The GRAS ¼” microphone is basically plug and play, and it lets us retain backwards compatibility of our current system while lowering the noise floor. It’s a perfect fit,”

— Greg Sikora, Acoustic Systems Sr. Director
Head of HARMAN’s Automotive Acoustic Systems Engineering department

Start Your Customization Journey

Ready to explore a tailored microphone or sensor solution? Let's connect.

Request a Consultation

Featured Custom Solution: GRAS 47BG

Precision meets adaptability.

The GRAS 47BG is a testament to our commitment to custom-engineered solutions. Developed in close collaboration with a major aerospace manufacturer, the 47BG is a custom microphone set designed to meet highly specific needs in confined and challenging test environments.

With a slim profile and robust build quality, the 47BG provides accurate and repeatable measurements where standard microphones fall short. Its tailored geometry allows it to be seamlessly integrated into tight spaces — without sacrificing sensitivity, frequency response, or durability.

Key Highlights:

Ultra-slim design for confined-space applications
Precision-calibrated for high-frequency accuracy
Shock and temperature-resistant for rugged use
Designed in partnership with aerospace acoustic teams

The 47BG isn’t just a microphone — it’s a custom-built answer to real-world testing challenges. It’s one of many examples of how GRAS transforms customer needs into specialized, high-performance acoustic tools.

Learn more about GRAS 47BG

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