G.R.A.S. 45BC-1 KEMAR Head & Torso with Mouth Simulator for Headset Test, 2-Ch LEMO

Connection: 200 V/LEMO
Channel(s): 2
ANSI: S3.36, S3.25
IEC: 60318-4
ITU-T Rec. P.57 Type 3.3 based on ITU-T Rec. P.58
Special feature: Built-in power amplifier for mouth simulator
  • 45BC-1 With Mouth Sim for Headset Test, 2-Ch LEMO

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 G.R.A.S. 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.

Read more about the advantages of KEMAR's design and anthropometric dimensions here.

Design

The 45BC-1 is a KEMAR for 2-channel headset test, with externally polarized ear simulators and large straight pinnae.

It 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-1 are the 44AA Mouth Simulator, the RA0045 Ear Simulator According to 60318-4 and the KB0065/KB0066 Large Straight Pinnae.

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 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 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 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 55 Shore 00. They comply with the IEC and ITU-T recommendations.

Other accessories for this configuration are listed in the Ordering Info tab.

Performance and warranty

KEMAR is made of components from our standard portfolio and are all manufactured of high-quality material and branded parts that were chosen and processed to ensure life-long stability and robustness. This, enables us to offer 2 years warranty against defective materials and workmanship.
Exceptions: Microphones included in KEMAR as for these our normal 5 year warranty apply. The warranty period for cables is 6 months.

Connector type 3 m 7-pin LEMO
Set sensitivity @ 250 Hz (±2 dB) mV/Pa 12.5
Set sensitivity @ 250 Hz (±2 dB) dB re 1V/Pa -38.5
Theoretical dynamic range lower limit with G.R.A.S. preamplifier dB(A) 25
Theoretical dynamic range upper limit with G.R.A.S. preamplifier @ +28 V / ±14 V power supply dB 151
Theoretical dynamic range upper limit with G.R.A.S. preamplifier @ +120 V / ±60 V power supply dB 163
Resonance frequency kHz 13.5
Temperature range, operation °C / °F -30 to 60 / -22 to 140
Temperature range, storage °C / °F -40 to 65 / -40 to 149
Humidity range non condensing % RH 0 to 95%
ANSI standard S3.36, S3.25
IEC standard 60318-7
ITU-T recommondations P. 58
Weight g / oz 11.45 k / 404
MOUTH SIMULATOR .
Output impedance Ω 8
Maximum power, continuous W 10
Maximum power, pulsed 2 sec. W 50
Input impedance 20
Gain dB 10
Input signal, max. Vrms 2
Power supply, external Vdc 24

Included items

G.R.A.S. 45BC

KEMAR Head & Torso with Mouth Simulator, non-configured

G.R.A.S. KB0065

KEMAR Large Right Ear 55 Shore OO

G.R.A.S. KB0066

KEMAR Large Left Ear 55 Shore OO

G.R.A.S. RA0237

Straight Ear Extension Canal Kit for KEMAR (2 pcs)

G.R.A.S. RA0045

IEC 60318-4 Ear Simulator (2 pcs)

G.R.A.S. 26AS-S3

1/4" Standard Preamplifier with 0.4 m cable, Short (2 pcs)

G.R.A.S. GR0010

Adapter for 1/2" Microphone and 1/4" Preamplifier (2 pcs)

G.R.A.S. AA0008

3 m LEMO 7-pin - LEMO 7-pin Cable (2 pcs)

G.R.A.S. 46BP

1/4" LEMO Pressure Standard Microphone Set

 

Optional items

Power Modules for Externally Polarized Ear Simulators and Microphones

G.R.A.S. 12AK

1-Channel Power Module with gain, filters and SysCheck generator

G.R.A.S. 12AD

1-Channel Power Module

G.R.A.S. 12AA

2-Channel Power Module with gain, filters and SysCheck generator

G.R.A.S. 12AR

2-Channel Power Module 

G.R.A.S. 12AQ

2-Channel Universal Power Module with signal conditioning and PC interface

 

For Ear Simulator Calibration

G.R.A.S. 42AP

Intelligent Pistonphone (250 Hz or 251.2 Hz, 114 dB +/- 0.05 dB)

G.R.A.S. 42AA

Pistonphone (250 Hz, 114 dB +/- 0.08 dB)

G.R.A.S. RA0157

1/2" Calibration Adapter for KEMAR Pinna

 

Pinna Simulators

G.R.A.S. KB0060

KEMAR Small Right Ear 55 Shore OO

G.R.A.S. KB0061

KEMAR Small Left Ear 55 Shore OO

G.R.A.S. KB0065

KEMAR Large Right Ear 55 Shore OO 

G.R.A.S. KB0066

KEMAR Large Left Ear 55 Shore OO

G.R.A.S. KB1060

KEMAR Small Right Ear, 35 Shore OO 

G.R.A.S. KB1061

KEMAR Small Left Ear 35 Shore OO

G.R.A.S. KB1065

KEMAR Large Right Ear 35 Shore OO 

G.R.A.S. KB1066

KEMAR Large Left Ear 35 Shore OO

G.R.A.S. KB0090

KEMAR Large Right Ear (VA-Style/SQ) 55 Shore OO 

G.R.A.S. KB0091

KEMAR Large Left Ear (VA-Style/SQ) 55 Shore OO

G.R.A.S. KB1090

KEMAR Large Right Ear (VA-Style) 35 Shore OO 

G.R.A.S. KB1091

KEMAR Large Left Ear (VA-Style) 35 Shore OO 

 

Ear Mould Simulators

G.R.A.S. KB0110

Ear Mould Simulator for 2 mm Inner diameter tubing 

G.R.A.S. KB0111

Ear Mould Simulator for 3 mm Inner diameter tubing

 

Ear Canal Extension and Microphone Holder Kits (kits with 2 pcs and O-rings)

G.R.A.S. RA0237

Straight Ear Canal Extension Kit for KEMAR 

G.R.A.S. RA0238

VA-tapered Ear Canal Extension Kit for KEMAR 

G.R.A.S. RA0239

Ear Canal Extension Kit w. silicone lining for KEMAR

G.R.A.S. RA0240

Holder for long 1/2" microphone Kit for KEMAR 

G.R.A.S. RA0241

Holder for short 1/2" microphone Kit for KEMAR

G.R.A.S. RA0243

Holder for 1/4" microphone Kit for KEMAR

G.R.A.S. RA0244

O-ring kit for KEMAR, 2 pcs. 

G.R.A.S. RA0249 Straight Ear Canal Extension Kit for KEMAR,
made of POM, for binaural hearing aid test
G.R.A.S. RA0250 Tapered Ear Canal Extension Kit for KEMAR,
made of POM, for binaural hearing aid test

 

KEMAR Retrofit Kit for Binaural Hearing Aid Test

G.R.A.S. 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

G.R.A.S. AA0008

LEMO 7-pin - LEMO 7-pin Cable, 3 m 

G.R.A.S. AA0009

LEMO 7-pin - LEMO 7-pin Cable, 10 m

G.R.A.S. AA0020-CL

LEMO 7-pin - LEMO 7-pin Cable, Customized Length, xxxx cm

 

Flight Case

G.R.A.S. KM0094

 PELI Case for KEMAR

 

Simulation Model of KEMAR

G.R.A.S. KB3000

Simulation Model of KEMAR with large pinnae

G.R.A.S. KB3001

Simulation Model of KEMAR with small pinnae

 

Stand for KEMAR

G.R.A.S. AL0026

 Tripod (loudspeaker) stand for KEMAR, Ø 35 mm

 

Miscellaneous

G.R.A.S. KB0000

KEMAR Handbook 

G.R.A.S. KB0010

T-Shirt for KEMAR