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6-Microphone Arrays for In-Cabin Acoustic Testing GRAS PR0003 & PR0004!
The Future of NVH Testing in Coming
The Gold Standard in Cabin Sound Measurement
Today’s drivers expect more than horsepower—they expect a quiet, immersive audio experience inside their vehicles. From EVs to luxury sedans, in-cabin acoustic quality has become a competitive differentiator in automotive design. Whether it’s benchmarking a sound system, reducing unwanted noise, or tuning NVH profiles, precise and repeatable measurements are key.
The GRAS PR0003 & PR0004 are a rugged, field-ready 6-microphone array engineered for in-cabin acoustic testing. They are designed to support the growing demand for standardized, repeatable sound field measurements, following methodologies like the AES TC-AA recommendation for in-car acoustic measurements (PR0003). With these GRAS 6-microphone arrays, car manufacturers gain the precision, consistency, and ease-of-use needed to deliver world-class in-cabin audio experiences—today and into the future.
How the GRAS 6-Microphone Array supports your work
The GRAS 6-Microphone Array is a precision-engineered tool specifically designed to meet this challenge. Developed in collaboration with leading automotive audio experts and aligned with the AES TC-AA recommendation, it enables high-resolution spatial characterization of the in-cabin acoustic field. Here’s how it supports your sound optimization journey:
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True-to-life testing – Accurately captures how passengers perceive sound in real seating positions.
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Repeatable results – Rigid, fixed-position arrays and optional seat mount ensure consistency across vehicles, prototypes, and test environments.
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Supports system benchmarking – Ideal for comparing vehicles, audio systems, and tuning setups using standardized protocols.
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Saves development time – Simplified setup, internal cabling, and single-connector design make it quick and easy to deploy—whether in the lab or on the line
Key Features
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Optimized for 1/4” Microphones
Compatible with GRAS 46BC, 46BL-1, 46BD, and 46BE.
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Two Configurations, One Solution
PR0003: Conforms to AES TC-AA in-car acoustic measurement recommendations. PR0004: Tailored to Harman’s proven in-house testing setup.
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Flexible Configuration
The array pitch angle can be fixed at the standard 30° or adjusted freely to accommodate other angles as needed.
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Smart Mounting System
A durable and adaptable system that ensures consistent and repeatable placement of arrays on the vehicle seat.
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Single-Cable Convenience
All six microphone signals are channelled through a 7-pin LEMO connector – simplifying setup and reducing clutter.
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Robust Build Quality
Internally wired for clean integration, rugged frame, and secure microphone holders that withstand calibrator use.
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Precise Positioning Tools
Includes bull’s-eye spirit levels and an inclinometer
