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45BB-14 KEMAR for High-Frequency Test of Ear- and Headphones, 2-Ch CCP
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45BB-14 KEMAR for High-Frequency Test of Ear- and Headphones, 2-Ch CCP
The 45BB-14 KEMAR with TEDS is a manikin configured with pre-polarized high-frequency on-ear simulators and anthropometric pinnae for dual-channel ear- and headphone test up to 20 kHz. Its corresponding LEMO equivalent is the GRAS 45BB-13 KEMAR.
The KEMAR head and torso simulator was introduced by Knowles in 1972 and quickly became the industry standard for hearing-aid manufacturers and research audiologists (visit KEMAR.us to read the full story). It is based on worldwide average human male and female head and torso dimensions. It meets the requirements of ANSI S3.36/ASA58-2012 and IEC 60318-7:2011.
The GRAS 45BB KEMAR has the same dimensions and acoustical properties as the original KEMAR, but has been developed further by GRAS to meet the industry’s demand for realistic measurements of hearing aids, headphones, and headsets. It provides acoustic diffraction similar to that encountered around the median human head and torso, both in the proximity and in the far-field.
Key Specifications
| Connector type | BNC |
| Set sensitivity @ 250 Hz (±2 dB) | 12.5 mV/Pa |
| Set sensitivity @ 250 Hz (±2 dB) | -38.5 dB re 1V/Pa |
| Theoretical dynamic range lower limit with GRAS preamplifier | 25 dB(A) |
| Theoretical dynamic range upper limit with GRAS CCP preamplifier | 150 dB |
| Resonance frequency | 13.5 kHz |
| Temperature range, operation | -30 to 60 °C / -22 to 140 °F |
| Temperature range, storage | -40 to 65 °C / -40 to 149 °F |
| Humidity range non condensing | 0 to 95% % RH |
| ANSI standard | S3.36, S3.25 |
| IEC standard | 60318-4 (former 60711), 60318-7 (former 60959) |
| ITU-T recommendations | P. 58 |
| Weight | 11.45 k g / 404 oz |
Specifications from the official GRAS product sheet. Please refer to the attached datasheet for full details.
