GRAS 45BC-4 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch CCP
Connection: Constant Current Power (0 V/CCP)
Channel(s): 1
ANSI standards: S3.36, S3.25
IEC standards:60318-4 (formerly 60711), 60318-7 (formerly 60959)
Special feature: Telephone test
The 45BC-4 KEMAR Head & Torso with Mouth Simulator and TEDS for Telephone Test, 1-Ch CCP is configured with pinnae and with IEC 60318-4 Ear Simulator and ear canal extension in the right ear. Due to the design of KEMAR, realistic measurement in a sound environment as experienced by a human being using a hearing aid is possible. In addition, the 45BC-3 is provided with a mouth simulator for testing the microphone in the telephone. The 45EA handset positioning system is included. Its CCP equivalent is GRAS 45BC-3 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch LEMO.
Technology
Introduction
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 current KEMAR Head and Torso 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.
As all the preconfigured 45BC KEMARs consist of the same basic 45BC KEMAR Non-configured, plus a set of application-specific accessories, the full information about a given KEMAR configuration is obtained by combining the information about the 45BC KEMAR Non-configured and the information for a given configured version as found in the present text. Read about the non-configured KEMAR here.
TEDS Compatibility
All CCP-based KEMAR configurations are IEEE 1451.4 TEDS v. 1.0 compliant. If your measurement platform supports Transducer Electronic Data Sheets (TEDS), you will be able to read and write data like properties and calibration data.
Design
The 45BC-4 is a KEMAR Head & Torso with Mouth Simulator for Telephone Test, with prepolarized ear simulator and large straight pinnae. A special feature of this configuration is the 45EA Handset Positioning System.
45BC-4 is delivered fully configured, individually calibrated and ready for use. In addition to a system calibration certificate, a USB flash memory with simulation data is included.
The main configuration specific components of the 45BC-4 are the 44AA Mouth Simulator, the RA0045-S1 Ear Simulator According to 60318-4, the KB1065/KB1066 Large Straight Pinnae and the 45EA Handset Positioning System.
The 44AA Mouth Simulator according to ITU-T Rec. P51 with built-in power amplifier
The maximum continuous signal the mouth can produce in 1/3-octave bands is 100dB re. 20µPa in the frequency range of 100Hz to 16kHz. Its loudspeaker accepts an external signal either directly or via its own built-in power amplifier (when power is applied).
The 60318-4 Ear Simulator
The acoustic input impedance of the RA0045-S1 Ear Simulator closely resembles that of the human ear and, as a result, loads a sound source in very much the same way.
It complies with IEC 60318-4 and is measured and calibrated according to ITU-T P.57. It embodies a number of carefully designed volumes connected via well-defined and precisely tuned resistive grooves. In an equivalent electrical circuit, capacitors would represent the volumes, and inductance and resistance would represent respectively air mass and air flow within the resistive groves.
Read more about the RA0045-S1 Ear Simulator.
The KB0065/KB0066 Pinnae
The KB0065 and KB0066 are large straight pinnae for use with a straight ear canal extension. The hardness is 35 Shore 00. They comply with the IEC and ITU-T recommendations.
The 45EA Handset Positioning System
The 45EA Handset Positioning System is designed for the head and torso simulator with Mouth Simulator. With this combination, you can make very realistic in-situ measurements on mobile telephones as well as conventional handsets.
You can mount the system on the KEMAR without additional tools. The system can be mounted on either side of KEMAR, and you can easily switch it from one side to the other side.
Read more about the 45EA Handset Positioning System.
Other accessories for this configuration are listed in the Ordering Info tab.
Performance and warranty
KEMAR is made of components from our standard portfolio, all manufactured of high-quality material and branded parts chosen and processed to ensure life-long stability and robustness. This enables us to offer a two-year warranty against defective materials and workmanship.
Exceptions: Microphones included in KEMAR as for these our normal five-year warranty applies. The warranty period for cables is 6 months.
Specifications
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Ordering info
Included items
| GRAS 45BC |
KEMAR Head & Torso with GRAS 44AA Mouth Simulator, non-figured |
| GRAS KB1065 |
KEMAR Large Right Ear 35 Shore OO |
|
KEMAR Large Left Ear 35 Shore OO |
|
|
GRAS RA0237 |
Straight Ear Canal Extension Kit for KEMAR (2 pcs) |
| GRAS RA0045-S1 |
IEC 60318-4 Ear Simulator, Prepol. version |
|
GRAS 26CS |
1/4" CCP Standard Preamplifier with 0.4 m cable, Short |
| GRAS RA0001 |
Adapter for 1/2" Microphone and 1/4" Preamplifier |
|
GRAS GR0408 |
Exterior Ear Canal |
|
GRAS GR0409 |
Union Nut |
| GRAS AA0018-S |
Microdot-BNC Cable, 35 cm |
| GRAS AA0035 |
BNC-BNC Cable, 3 m |
| GRAS 46BD |
1/4" CCP Pressure Standard Microphone Set |
|
Microdot-BNC Cable, 3 m |
|
|
GRAS 45EA |
Handset Positioning System |
Optional items
Power Modules for Pre-polarized Ear Simulators and Microphones
|
1-Channel CCP Power Module with A-weighting filter |
|
| GRAS 12AQ |
2-Channel Universal Power Module with signal conditioning and PC interface |
For Ear Simulator Calibration
| GRAS 42AP |
Intelligent Pistonphone (250 Hz or 251.2 Hz, 114 dB +/- 0.05 dB) |
| GRAS 42AA |
Pistonphone (250 Hz, 114 dB +/- 0.08 dB) |
| GRAS RA0157 |
1/2" Calibration Adapter for KEMAR Pinna |
Pinna Simulators
| GRAS KB0060 |
KEMAR Small Right Ear 55 Shore OO |
| GRAS KB0061 |
KEMAR Small Left Ear 55 Shore OO |
| GRAS KB0065 |
KEMAR Large Right Ear 55 Shore OO |
| GRAS KB0066 |
KEMAR Large Left Ear 55 Shore OO |
| GRAS KB1060 |
KEMAR Small Right Ear, 35 Shore OO |
| GRAS KB1061 |
KEMAR Small Left Ear 35 Shore OO |
| GRAS KB1065 |
KEMAR Large Right Ear 35 Shore OO |
| GRAS KB1066 |
KEMAR Large Left Ear 35 Shore OO |
| GRAS KB0090 |
KEMAR Large Right Ear (VA-Style/SQ) 55 Shore OO |
| GRAS KB0091 |
KEMAR Large Left Ear (VA-Style/SQ) 55 Shore OO |
| GRAS KB1090 |
KEMAR Large Right Ear (VA-Style) 35 Shore OO |
| GRAS KB1091 |
KEMAR Large Left Ear (VA-Style) 35 Shore OO |
Ear Mould Simulators
| GRAS KB0110 |
Ear Mould Simulator for 2 mm Inner diameter tubing |
| GRAS KB0111 |
Ear Mould Simulator for 3 mm Inner diameter tubing |
Ear Canal Extension and Microphone Holder Kits (kits with 2 pcs and O-rings)
|
GRAS RA0237 |
Straight Ear Canal Extension Kit for KEMAR |
| GRAS RA0238 |
VA-tapered Ear Canal Extension Kit for KEMAR |
|
GRAS RA0239 |
Ear canal Extension Kit w. silicone lining for KEMAR |
|
GRAS RA0240 |
Holder for long 1/2" microphone Kit for KEMAR |
|
GRAS RA0241 |
Holder for short 1/2" microphone Kit for KEMAR |
|
GRAS RA0243 |
Holder for 1/2" microphone Kit for KEMAR |
|
GRAS RA0244 |
O-ring kit for KEMAR, 2 pcs. |
|
GRAS RA0249 |
Straight Ear Canal Extension Kit for KEMAR, made of POM, for binaural hearing aid test |
|
GRAS RA0250 |
Tapered Ear Canal Extension Kit for KEMAR, made of POM, for binaural hearing aid test |
KEMAR Retrofit Kit for Binaural Hearing Aid Test
| GRAS RA0251 | KEMAR Retrofit Kit for Binaural Hearing Aid Test: The Kit includes Ear Holder Plates, mounting bolts and the RA0249 and RA0250 Ear Canal Extension Kits. Included items are made of POM, Nylon and Teflon. |
Extension Cables
|
GRAS AA0034 |
BNC-BNC Cable, 2 m |
| GRAS AA0035 |
BNC-BNC Cable, 3 m |
|
GRAS AA0036 |
BNC-BNC Cable, 5 m |
| GRAS AA0037 |
BNC-BNC Cable, 10 m |
Flight Case
|
GRAS KM0094 |
PELI Case for KEMAR |
Simulation Model of KEMAR
|
GRAS KB3000 |
Simulation Model of KEMAR with large pinnae |
|
GRAS KB3001 |
Simulation Model of KEMAR with small pinnae |
Stand for KEMAR
|
GRAS AL0026 |
Loudspeaker stand for KEMAR, Ø 35 mm |
Miscellaneous
|
GRAS KB0000 |
KEMAR Handbook |
|
GRAS KB0010 |
T-Shirt for KEMAR |
GRAS Sound & Vibration reserves the right to change accessories without notice.
