GRAS 43AG Ear & Cheek Simulator

Dyn range: 25 dB(A) to 164 dB
or 10.5 dB(A) to 113 dB (low-noise version)
ANSI: S3.7
IEC: 60318-4

Technology

Introduction

The GRAS 43AG Ear and Cheek Simulator is a unique, multi-faceted and multi-purpose tool that helps you accomplish the job in an effective and efficient manner. We call it the table-top KEMAR as it offers you much of the KEMAR capability in a convenient and portable packaging.

Our vision for the 43AG is to assist you in all facets of the product development cycle: From R&D testing to the final test and approval of the finished product. As your product is put together, your team needs to ensure that individual changes do not conflict with your overall vision. Much of this validation work can be accomplished at their desks, in real time, making you comfortable and giving you the stamp of approval of the final product.

Additionally, very few manufacturers have their entire production vertically integrated and are therefore highly dependent on the quality delivered by their sub-suppliers. To ensure the quality of the complete product, GRAS offers a variety of mobile test platforms that can easily be deployed at your supplier and in your own in-coming control department. The 43AG Ear and Cheek Simulator by GRAS provides that comfort and security: The parts comply to the highest standards: Yours.

Typical applications and use

The 43AG is a multi-purpose tool and can for example be used to verify frequency response, distortion, isolation and leakage.

Its versatility means that it can be used for testing of both concha and insert types earphones. It can also be used for headphone and headset testing, both circumaural and supra-aural types. Also, all common types of hearing-aids, and telephone handset can be tested with the 43AG.

To make ordering and decision making easier, we have made 43AG available in 5 configurations. Except for a few simple steps, they are fully assembled, calibrated and ready for use.

The following configurations are available:

43AG-1 and -2

43AG-1 Ear and Cheek Simulator LEMO is configured with an Externally Polarized Ear Simulator According to IEC 60318-4 and a large KEMAR Right Pinna 55 Shore OO.

43AG-2 Ear and Cheek Simulator CCP is configured with a Prepolarized Ear Simulator According to IEC 60318-4 and a large KEMAR Right Pinna 55 Shore OO.

With these configurations, tests can be performed according to the following standards:

  • IEC 60959
  • IEC 60318-4 (former IEC 60711)
  • ITU-T Rec. P.57 Type 2 Artificial Ear
  • ITU-T Rec. P.57 Type 3.3 Pinna Simulator

43AG-3 and -4

43AG-3 Ear and Cheek Simulator w Anthropometric Pinna LEMO is configured with an Externally Polarized Ear Simulator According to IEC 60318-4 and a large KEMAR Right Anthropometric Pinna 35 Shore OO.

43AG-4 Ear and Cheek Simulator w Anthropometric Pinna CCP is configured with a Prepolarized Ear Simulator According to IEC 60318-4 and a large KEMAR Right Anthropometric Pinna 35 Shore OO.

The anthropometric pinna has anatomically shaped concha and ear canal, resulting in Improved fit and repeatability. The outer pinna has improved collapsability. In addition to the traditional push mounting from the outside, the pinna is secured with two screws from the inside. These two screw ensure that the pinna is held firmly in place. Therefore, it seals perfectly against the ear simulator and the cheek plate, and it is therefore possible to mount and dismount DUTs repeatedly without compromising the seal. The outer shape of the anthropometric pinna conforms with ITU-T Type 3.3. Read more about the anthropometric pinna here.

Choose one of these configurations if you need to test insert type earphones, or if you want the benefits of the improved collapsability of the new pinna when testing circum- and supra-aural earphones.

43AG-5

43AG-5 Ear and Cheek Simulator, Low-noise, is configured with a 43BB low-noise ear simulator system and a large KEMAR Right Anthropometric Pinna 35 Shore OO.

The new improved pinna has anatomically shaped concha and ear canal and offers better fit, placement and seal, resulting in improved low frequency testing and better low-noise testing. Also, the more realistic ear canal combined with a more flexible pinna provides greater repeatability in measurements of in-ear, circum-aural or supra-aural headphones. The outer shape of the anthropometric pinna conforms with ITU-T Type 3.3. Read more about the advantages of the anthropometric pinna here.

The reduced noise floor of the 43BB low-noise system results in very good correlation to subjective listening results. Read more about the 43BB Low-noise Ear Simulator System here.

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The contents of each of these configurations are listed in the tab Ordering info.

Compatibility

KEMAR pinnae are available for the 43AG: small and large in "soft" and "normal" versions. VA-Style as well as anthropometric pinnae are available. To ensure that the base of the pinna is flush with the cheek plate, only right pinnae should be used.

System verification

For sensitivity calibration, we recommend using a pistonphone like GRAS 42AP Intelligent Pistonphone  or the GRAS 42AA Pistonphone.

Quality and warranty

All GRAS microphones are made of high-quality materials that will ensure life-long stability and robustness. The microphones are all assembled in verified clean-room environments by skilled and dedicated operators with many years of expertise in this field.

The microphone diaphragm, body, and improved protection grid are made of high-grade stainless steel, which makes the microphone resistant to physical damage, as well as corrosion caused by aggressive air or gasses.

This, combined with the reinforced gold-plated microphone terminal which guarantees a highly reliable connection, enables GRAS to offer 5 years warranty against defective materials and workmanship.

Service

If you accidentally damage the diaphragm on a GRAS microphone, we can — in most cases — replace it at a very reasonable cost and with a short turn-around time. This not only protects your investment, but also pleases your quality assurance department because you don’t have to worry about new serial numbers, etc.

Calibration 

Before leaving the factory, all GRAS microphones are calibrated in a controlled laboratory environment using traceable calibration equipment.

Depending on the use, measurement environment, and internal quality control programs, we recommend recalibrating the microphone at least once a year.




Specifications

Theoretical dynamic range lower limit with GRAS preamplifier
dB(A)
25
Theoretical dynamic range upper limit with GRAS preamplifier @ +28 V / ±14 V power supply
dB
153
Theoretical dynamic range upper limit with GRAS preamplifier @ +120 V / ±60 V power supply
dB
164
Set sensitivity @ 250 Hz (±2 dB)
mV/Pa
12.5
Set sensitivity @ 250 Hz (±2 dB)
dB re 1V/Pa
-38.1
Coupler volume
mm³
0.4 ccm
Resonance frequency
kHz
13.5 (ear sim)
Temperature range, operation
°C / °F
-30 to 60 / -22 to 140
Temperature coefficient @250 Hz
dB/°C / dB/°F
- 0.01 / -0.006
Humidity range non condensing
% RH
0 to 75
ANSI standard
S3.7
IEC standard
60318-4 (former 60711)
ITU-T recommondations
P.380
CE/RoHS compliant/WEEE registered
Yes/Yes/Yes
Connector type
7-pin LEMO (FGG.1B.307)
Weight
g / oz
1.95 kg / 68.784
Specification Conditions

The specs above are valid for 43AG-1 to -4.

Specs for the GRAS 43BB Low-noise Ear Simulator System used in 43AG-5 can be found here.

GRAS Sound & Vibration reserves the right to change specifications without notice.

Ordering info

Included

43AG-1 Ear and Cheek Simulator LEMO

GRAS RA0052

Test Jig with mounting base and adjustable force clamp

GRAS RA0314

Cheek plate

GRAS KB0065

KEMAR Large Right Pinna 55 Shore OO 

GRAS GR0917

Ear Canal Extension 

GRAS RA0045

Externally polarized Ear Simulator According to IEC 60318-4

GRAS RA0001

Right-angled 1/2" to 1/4" Adapter

GRAS 26CA

1/4" Preamplifier with 3 m integrated cable

GRAS RA0199

Finger Simulator

GRAS GR0408

External Ear Canal

GRAS GR0409

Union Nut

 

43AG-2 Ear and Cheek Simulator CCP

GRAS RA0052

Test Jig with mounting base and adjustable force clamp

GRAS RA0314

Cheek plate

GRAS KB0065

KEMAR Large Right Pinna 55 Shore OO 

GRAS GR0917

Ear Canal Extension 

GRAS RA0045-S1

Pre-polarized Ear Simulator According to IEC 60318-4

GRAS RA0001

Right-angled 1/2" to 1/4" Adapter

GRAS 26CB

1/4" Preamplifier

GRAS AA0070

Microdot to BNC Cable, 3 m

GRAS RA0199

Finger Simulator

GRAS GR0408

External Ear Canal

GRAS GR0409

Union Nut

 

43AG-3 Ear and Cheek Simulator w Anthropometric Ear LEMO

GRAS RA0052

Test Jig with mounting base and adjustable force clamp

GRAS RA0314

Cheek plate

GRAS KB5000

KEMAR Large Right Anthropometric Pinna 35 Shore OO 

GRAS GR1874

Ear Simulator Holder 

GRAS SK6012

Finger Screw, 2 pcs

GRAS RA0045

Externally Polarized Ear Simulator According to IEC 60318-4

GRAS RA0001

Right-angled 1/2" to 1/4" Adapter

GRAS 26CA

1/4" Preamplifier with 3 m integrated cable

GRAS RA0199

Finger Simulator

GRAS GR0408

External Ear Canal

GRAS GR0409

Union Nut

 

43AG-4 Ear and Cheek Simulator w Anthropometric Ear CCP

GRAS RA0052

Test Jig with mounting base and adjustable force clamp

GRAS RA0314

Cheek plate

GRAS KB5000

KEMAR Large Right Anthropometric Pinna 35 Shore OO 

GRAS GR1874

Ear Simulator Holder 

GRAS SK6012

Finger Screw, 2pcs

GRAS RA0045-S1

Pre-polarized Ear Simulator According to IEC 60318-4

GRAS RA0001

Right-angled 1/2" to 1/4" Adapter

GRAS 26CB

1/4" Preamplifier

GRAS AA0070

Microdot to BNC Cable, 3 m

GRAS RA0199

Finger Simulator

GRAS GR0408

External Ear Canal

GRAS GR0409

Union Nut

 

43AG-5 Ear and Cheek Simulator, Low-noise

GRAS RA0052

Test Jig with mounting base and adjustable force clamp

GRAS RA0314

Cheek plate

GRAS KB5000

Large Right Anthropometric Pinna 35 Shore OO

GRAS GR1874

Ear Simulator Holder

GRAS SK6012

Finger Screw, 2 pcs

GRAS RA0001

Right Angled 1/2" to 1/4" Adapter

GRAS RA0234

Low-noise Ear Simulatorr

GRAS 26HG

1/4" Preamplifier, High Impedance

GRAS 26HT

Filter and Gain Unit

GRAS AA0059

LEMO 7-pin to 7-pin cable, 1 m

GRAS GR0408

External Ear Canal

GRAS GR0409

Union Nut

GRAS RA0199

Finger Simulator

GRAS 12HF

Power Module for Low-noise Systems

 

Optional

Power Supply & Signal Conditioning

GRAS 12AQ

For both externally and prepolarized configurations: Power Module, dual-channel

GRAS 12AK

For externally polarized configurations, Power Module, single-channel

GRAS 12AU

1-Channel Power Module with Signal Conditioning and Power Amplifier

 

Pinna Simulators

GRAS KB0060

KEMAR Small Right Pinna 55 Shore OO

GRAS KB0065

KEMAR Large Right Pinna 55 Shore OO 

GRAS KB1060

KEMAR Small Right Pinna 35 Shore OO 

GRAS KB1065

KEMAR Large Right Pinna 35 Shore OO 

GRAS KB0090

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

GRAS KB1090

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

 

Calibration Equipment

GRAS RA0184

Force Gauge (0 - 25 N)

GRAS RA0157

1/2" Calibration Adapter for KEMAR pinnae (required for an 60318-4 (711) Configuration)

GRAS 42AP

Pistonphone with built-in precision barometer (250 Hz or 251.2 Hz, 114 dB ±0.05 dB) (recommended)

GRAS 42AA

Pistonphone (250 Hz, 114 dB ±0.08 dB)

GRAS RA0090

94 dB Pistonphone Coupler for calibration of low-noise system

 

Cables

GRAS AA0008

3 m Extension cable, 7-pin LEMO to 7-pin LEMO for connection to power module.

 

Miscellaneous

GRAS RA0196

High-tension Spring Kit (only relevant for 43AG delivered before summer 2014 and only if higher tension is required).

GRAS Sound & Vibration reserves the right to change accessories without notice.

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