Accruate & Trusted Measurement Microphones
GRAS is a leading manufacturer of state-of-the-art measurement microphones. The company specializes in solution for research and development, production engineering, quality control and training and educational applications within aerospace, automotive, audiology, consumer electronics and other industries with strict requirements for microphone accuracy and repeatability.
Products
Measurement microphone sets
GRAS provides measurement microphone sets that fulfil users' typical measurement needs & available for both CCP and 7-pin LEMO inputs. All microphone sets are delivered as a unit and are calibrated accordingly.
Measurement Microphone
GRAS provides Prepolarized & Externally-polarized measurement microphone cartridges covering various frequency ranges, dynamic ranges & suitable for different applications like Free-field, Pressure or Random-incidence situations.
Microphone Preamplifiers
GRAS microphone preamplifiers are all small, robust units optimised for acoustical measurements with condenser microphones. Two different preamplifiers, one with CCP supply and other with LEMO supply provided by GRAS
Special microphones
Special microphones are required for particular requirements and categorized as Array mics, Lownoise measuring mics, Outdoor mics, Surface mics, UTP mics , Infra-sound mics, Intensity mics, Probe mics, Flush mount microphones.
Production line microphones
GRAS Miniature Production Line Microphone, the world's first microphone with EQset technology designed for use in production line environments, and it provides many benefits over traditional production line- or array-style microphones.
Ear simulator kits
GRAS Ear Simulator kit is a complete test jig for acoustical measurements on telephone handsets, earphones, hearing aids, loudspeakers and complies with the international requirements.
Artificial ears, ear & mouth simulators
GRAS artificial ears and ear & mouth simulators are designed to enable measurements under well defined acoustical conditions. The solutions include Externally polarized cartridges (200 V), Mouth simulators, Prepolarized cartridges (0 V) etc.
Power modules
Power modules provides polarization voltage for the transducer, ensuring that the microphone gets the charging voltage it needs.It provides supply voltage for the microphone preamplifier.
Head & torso simulators
The KEMAR manikin (Head & Torso) is the recognized industry-standard for in-situ anthropomorphic testing in the fields of Telecommunications, Hearing conservation, Sound recording etc. It is a configurable acoustic research tool that simulates the changes that occur to sound waves as they pass a human head & torso.
Test fixtures
GRAS provides differenct test fixtures for ear- and headphone testing, hearing-protector testing and telephone testing in accordance with international standards and recommendations.
Our Services
Repair
Professional Service Center with trained Technicians and latest tools.
Rental
Short and Long term rentals to support varying project needs.
Calibration
NABL Accredited calibration available for all equipment, along with Adjustment Service.
Training
Contact us for User training, Domain training or any special training requirement.
Custom App Development
Customized extension & full fledged software projects for special needs and projects.
AMC
Bring your maintenance costs in control with our AMC offerings with equipments.
Solutions/Applications
Acoustic Sensors for NVH Testing - As the world leader in developing cutting-edge acoustic sensors, GRAS provides new and improved microphones for more efficient and reliable acoustic NVH testing.
Since the founding of GRAS Sound & Vibration we have been deeply involved in the audiology industry. Through close cooperation with leading manufacturers in the hearing aid industry involved in the audiology industry.
At GRAS, our focus on research has paved the way for new world standards for measurement microphones – including the world’s most popular and probably most copied acoustic sensor: the ½” measurement microphone.
High-Caliber Test Equipment for All Your Needs! - At GRAS, we acknowledge your challenges and try to overcome these by pushing the boundaries of what is possible within precision measurement microphones.
Environmental Noise & Monitoring - Environmental noise affects us all, whether it is a whine from a distant power station or the increased aircraft and vehicle traffic.
Aeroacoustics is important in the design of aircraft, vehicles, wind turbines, and even buildings and bridges to minimize vibrations and noise.