15. Ear Simulator - 43AG

The G.R.A.S. 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.

More details

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.

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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, G.R.A.S. 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 G.R.A.S. provides that comfort and security: The parts comply to the highest standards: Yours.

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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.

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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.

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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.

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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

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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.

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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.

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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.

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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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