GRAS 43AG Ear & Cheek Simulator

Introduction

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

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 incoming control department. The 43AG Ear and Cheek Simulator by GRAS provides that comfort and security: The parts comply with the highest standards: Yours.

TEDS Compatibility

All CCP-based configurations (-2, -4, -7, and -9) 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.

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 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 a number of 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 collapsibility. In addition to the traditional push mounting from the outside, the pinna is secured with two screws from the inside. These two screws 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 collapsibility of the new pinna when testing circum-aural 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 anthropometric 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.

43AG-6 and -7

43AG-6 Ear and Cheek Simulator, with High-Frequency Ear Simulator, LEMO is  configured with an externally polarized High-Frequency Ear Simulator and a large KEMAR Right Anthropometric Pinna 35 Shore OO.

43AG-7 Ear and Cheek Simulator, with High-Frequency Ear Simulator, CCP   is configured with a prepolarized High-Frequency Ear Simulator and a large KEMAR Right Anthropometric Pinna 35 Shore OO.

The GRAS RA0401 is an externally polarized  high-frequency version of the well-known standardized 60318-4 ear simulator, RA0402 is the prepolarized equivalent. They comply with IEC60318-4, but extend the useful frequency range to 20 kHz within a narrow tolerance band. Read more about the RA0401 here, and the RA0402 here.

The anthropometric pinna has anatomically shaped concha and ear canal and offers better fit, placement and seal, resulting in improved low and high frequency 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.

43AG-8 and -9

43AG-8 Ear and Cheek Simulator, with Hi-Res Ear Simulator, LEMO is configured with an externally polarized Hi-Res Ear Simulator and a large KEMAR Right Anthropometric Pinna 35 Shore OO.

43AG-9 Ear and Cheek Simulator, with Hi-Res Ear Simulator, CCP is configured with a prepolarized Hi-Res Ear Simulator and a large KEMAR Right Anthropometric Pinna 35 Shore OO.

The GRAS RA0403 is an externally polarized  hi-res version of the well-known standardized 60318-4 ear simulator, RA0404 is the prepolarized equivalent. They comply with IEC60318-4. The use of 1/4" microphones extend the useful frequency range to 50 kHz within a narrow tolerance band. Read more about the RA0403 here, and the RA0404 here.

The anthropometric pinna has anatomically shaped concha and ear canal and offers better fit, placement and seal, resulting in improved low and high frequency 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.

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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 Ear Simulators are made of high-quality materials that will ensure life-long stability and robustness. The microphones inside the Ear Simulators 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 Ear Simulator and the microphone inside the Ear Simulator, we can — in most cases — replace and repair it at a very reasonable cost and with 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 products 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.

Included

43AG-1 Ear and Cheek Simulator LEMO

43AG-2 Ear and Cheek Simulator CCP

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

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

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

43AG-6 Ear and Cheek Simulator w High-Frequency Ear Simulator, LEMO

43AG-7 Ear and Cheek Simulator w High-Frequency Ear Simulator, CCP

43AG-8 Ear and Cheek Simulator w Hi-Res Ear Simulator, LEMO

43AG-9 Ear and Cheek Simulator w Hi-Res Ear Simulator, CCP

Optional

Power Supply & Signal Conditioning

Pinna Simulators

Calibration Equipment

Cables

Miscellaneous

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