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KEMAR from GRAS

The world’s leading head and torso simulator for acoustic research

 

KEMAR (Knowles Electronics Manikin for Acoustic Research) is a head and torso simulator (HATS) developed by GRAS Sound & Vibration in collaboration with Knowles Electronics. It is designed to replicate the acoustic properties of an average human head and torso, making it ideal for various acoustic testing applications. KEMAR allows for accurate binaural recording and sound localization testing, helping researchers and engineers measure how sound interacts with the human body in realistic environments.

As a leading solution for acoustic measurements, GRAS KEMAR has become a standard tool for hearing aid testing, headphone testing, automotive acoustics, and telecommunication devices. By using GRAS KEMAR, companies can conduct precise evaluations of sound quality, noise isolation, and 3D audio simulation.

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Key Features of KEMAR

 

 

KEMAR from GRAS Sound & Vibration stands out due to its ability to replicate the acoustic properties of the human body with precision. Here are the key features that make GRAS KEMAR a leading choice for acoustic testing across industries: 

 

1. Anatomical Accuracy: KEMAR's head and torso are designed to closely mimic the acoustic characteristics of an average adult human. This includes detailed ear canals and pinnae (outer ear structures) for realistic ear simulation. The accuracy of GRAS KEMAR’s human-like model allows for precise acoustic measurements in real-world conditions. 

2. Acoustic Measurement: Equipped with calibrated microphones inside the ear canals, KEMAR captures binaural sound exactly as it would be perceived by a human listener. These measurements ensure high-frequency acoustic testing for sound quality assessments, making GRAS KEMAR essential for 3D audio and spatial sound testing. 

3. Interchangeable Pinnae: For added flexibility, KEMAR models feature interchangeable pinnae to simulate different human ear shapes and sizes. This adaptability is crucial for in-ear device testing and hearing aid development, providing accurate simulations for different auditory profiles. 

4. Calibration: GRAS KEMAR is fully calibrated to ensure reliable and repeatable acoustic measurements, making it a standardized solution for binaural recording, HRTF measurements, and acoustic transparency testing.