What GRAS does

GRAS Sound & Vibration is a Danish manufacturer of precision measurement microphones and acoustic test fixtures, founded in 1994 by acoustics pioneer Gunnar Rasmussen and headquartered in Holte, Denmark. The company designs and builds condenser measurement microphones (1/2", 1/4", 1/8"), preamplifiers, the KEMAR and AutoKEMAR Head & Torso Simulators, flush-mount and ground-array microphones, multi-microphone arrays, and EQset-enabled production-line microphones. Its microphones are constructed in Denmark from stainless steel in a clean-room environment and carry an industry-leading 5-year warranty. GRAS also operates an ISO 17025-accredited calibration laboratory and offers traceable calibration and diaphragm repair services globally through centers in Europe, North America, and Asia.

The company sells primarily to enterprise engineering customers in aerospace and defense, automotive (OEMs and Tier 1 suppliers), audiology, consumer audio and electronics, education and research, and environmental noise monitoring. Revenue is generated through direct hardware sales (microphones, fixtures, accessories, consumables) and recurring professional services (calibration, repair, maintenance agreements). Pricing is quote-based for B2B enterprise buyers and distributed through a hybrid motion combining regional sales engineers in the US, UK, Denmark, China, South Korea, and India with a network of local distributors across 40+ countries. Named deployments include 58 GRAS 67AX microphones used by NASA in the STRIVES5 eVTOL acoustic campaign and acoustic sensor deployment for the China Railway CR450 high-speed train program.

GRAS operates as a privately held subsidiary of Axiometrix Solutions, a test-solutions platform owned by Battery Ventures since spring 2020 that also includes Audio Precision (audio analyzers) and imc Test & Measurement (data acquisition). This positioning enables bundled acoustic measurement stacks and joint go-to-market, including UK sales consolidated under Audio Precision UK Ltd. The company employs 51-100 people and is currently shipping new automotive-focused product lines, including the 45BD AutoKEMAR and PR0003/PR0004 AutoArrays, indicating active investment in product surface expansion.

Name

GRAS

Legal name

GRAS Sound & Vibration

Website

https://grasacoustics.com

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

51–100 employees

Short description

GRAS Sound & Vibration is a Danish manufacturer of precision measurement microphones, Head & Torso Simulators, and acoustic test fixtures serving aerospace, automotive, audiology, consumer audio, and research customers in 40+ countries. It operates as part of Battery Ventures' Axiometrix Solutions platform alongside Audio Precision and imc Test & Measurement.

Ownership category

akta.pro rank

Product category

Acoustic Measurement Equipment

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Electronic and Precision Equipment Repair and Maintenance (811210)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Test & Measurement Equipment (Oscilloscopes, DAQ, signal analyzers, calibration benches) (IMAGAFAC)

akta.pro secondary industries

Calibration Services & Standards (Calibration labs, reference standards, traceability services) (IMAGAFAH), Metrology, Calibration & Testing Equipment (Balances, pH/DO, Standards) (HLAGAIAL)

Keywords

• Precision measurement microphones
• Acoustic test equipment
• Head torso simulators
• Sound vibration testing
• Production line microphones

Headquarters

HQ city

Holte

HQ country

Denmark

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Measurement Microphone Sales: Sale of precision measurement microphones including 1/2", 1/4", and 1/8" condenser microphones, preamplifiers, and related equipment for aerospace, automotive, audiology, consumer electronics, and research applications.
2. Acoustic Fixtures and Test Equipment: Sale of acoustic testing fixtures including Head & Torso Simulators (KEMAR, AutoKEMAR), Ear Simulator Kits, microphone arrays, and test fixtures for realistic acoustic measurements.
3. Calibration and Repair Services: Accredited calibration laboratory services in Denmark and GRAS Microphone Calibration Centers in Asia, Europe, and North America. Repair services for damaged diaphragms at reasonable cost.
4. Accessories and Consumables: Sale of cables, power modules, calibration equipment, hemisphere kits, and other accessories supporting microphone systems.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

GRAS manufactures precision measurement microphones (1/2", 1/4", and 1/8" condenser microphones), preamplifiers, acoustic fixtures such as KEMAR Head & Torso Simulators, ear simulators, microphone arrays, and related accessories for sound and vibration measurement. The company also operates accredited calibration laboratories and offers repair services for damaged diaphragms across a global service network in 40+ countries.

Product overview

GRAS Sound & Vibration is a manufacturer of precision measurement microphones and acoustic testing equipment. The product portfolio is organized around several interconnected product lines: (1) Measurement Microphone Sets, Cartridges, and Preamplifiers forming the core measurement hardware; (2) Production Line Microphones featuring EQset technology for manufacturing quality control; (3) Special Microphones including flush-mount and ground array models for aerospace applications; (4) Acoustic Fixtures including KEMAR Head & Torso Simulators (with the new 45BD AutoKEMAR for automotive testing), Ear Simulator Kits, and Headphone Test Fixtures for realistic human acoustic simulation; (5) Microphone Arrays including PR0003/PR0004 AutoArrays for spatial acoustic characterization; and (6) Supporting Accessories including Power Modules, Hemisphere Kits, Cables, Calibration Equipment (sound calibrators, pistonphones), and various adapters. The company serves aerospace, automotive, audiology, consumer electronics, and environmental noise monitoring industries. GRAS is part of Axiometrix Solutions along with Audio Precision and imc Test & Measurement, enabling complete acoustic measurement solutions when combined with Audio Precision APx audio analyzers.

Differentiator

Problem solved

Functional benefit

Brands

• KEMAR: The KEMAR Head & Torso Simulator is a renowned product line developed by GRAS for acoustic testing, originally designed for audiology and later adapted for automotive and other applications.
• AutoKEMAR

Products and services

• Measurement Microphone Sets

Quantifiable outcome

• 5-year warranty on all microphones, demonstrating long-term stability and reliability
• +1 more outcomes

Named customers4 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered flagship and core.

• Axiometrix SolutionsflagshipStrategic or Co-development PartnerGRAS is part of Axiometrix Solutions, a leading test solutions provider comprised of globally-recognized measurement brands. Axiometrix Solutions includes Audio Precision (US-based) and imc Test & Measurement (German-based), forming one of the world's strongest portfolios for acoustic sensors and audio measurement.
• Audio PrecisioncoreStrategic or Co-development PartnerSister brand within Axiometrix Solutions portfolio. Audio Precision provides audio testing solutions that complement GRAS measurement microphones. In the UK, Audio Precision UK Ltd now offers all GRAS products alongside the AP audio testing suite.
• imc Test & MeasurementcoreStrategic or Co-development PartnerSister brand within Axiometrix Solutions. imc provides comprehensive testing platforms used alongside GRAS sensors. Both brands participated in China's CR450 high-speed train testing program, with imc providing data acquisition and GRAS providing acoustic measurement sensors.

Scale indicators4 records

Recent moves6 records

Expansion highlights7 records

Direct peers

• NTI Audio (NTi Audio): NTI Audio manufactures professional audio measurement microphones, sound level meters, and acoustic analyzers for pro audio, broadcast, and environmental noise monitoring. It is a direct peer to GRAS in audio/acoustic measurement, with a comparable B2B sales motion.
• Brüel & Kjær (HBK): HBK is the global leader in acoustic measurement, offering precision microphones, sound level meters, HATS, and acoustic test systems. It is the most direct, larger-scale competitor to GRAS across the same automotive, aerospace, audiology, and environmental end markets.
• Head Acoustics: Head Acoustics specializes in HATS (HMS II.3), artificial heads, and communication/navigation/acoustic analysis systems, with strong positioning in automotive in-cabin acoustic testing. It is a direct peer to GRAS's KEMAR/AutoKEMAR and automotive arrays.
• PCB Piezotronics (MTS Systems / Amphenol): PCB Piezotronics manufactures precision measurement microphones, acoustic sensors, and vibration sensors used in product testing, NVH, and research. It directly competes with GRAS in industrial and laboratory acoustic measurement applications.
• ACO Pacific: ACO Pacific designs and manufactures precision measurement microphones, preamplifiers, and sound level meters used in research, audiometric, and industrial applications. It is a smaller, niche direct competitor to GRAS in the precision microphone segment.
• Microtech Gefell: Microtech Gefell manufactures high-precision condenser measurement microphones and acoustic measurement systems in Germany. It competes with GRAS at the high-precision tier of 1/2-inch, 1/4-inch, and 1-inch measurement microphones for laboratory and R&D use.

Broad incumbents

• National Instruments (NI / Emerson): NI is a broad-line test & measurement incumbent offering modular DAQ platforms used in acoustic and vibration testing. It competes at the system/instrumentation layer above GRAS microphones and represents a broader incumbent in the test & measurement category.
• Audio Precision: Audio Precision is GRAS's sister brand under Axiometrix Solutions and the leading manufacturer of audio analyzers (APx series). It is not a direct microphone competitor but is a complementary incumbent in the broader acoustic/audio test ecosystem, with overlapping enterprise customers.

Emerging players

• BSWA Technology: BSWA is a China-based manufacturer of measurement microphones, sound level meters, and acoustic calibration services, often at lower price points. It overlaps with GRAS in IEC 61094-class measurement microphones and represents the emerging low-cost competitive tier.

Others

• imc Test & Measurement: imc is a sister brand under Axiometrix Solutions that makes data acquisition and measurement systems used alongside acoustic sensors. It is a complementary ecosystem peer rather than a direct competitor, often bundled with GRAS microphones in large test setups such as the China Railway CR450 program.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/gras-sound-vibration
• Xx.com/grasacoustics

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about GRAS