Safety
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| M4 meet FCC requirements and |
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| are likely to generate less |
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| interference to hearing devices |
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| than phones that are not |
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| labeled. M4 is the better/higher |
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| of the two ratings. |
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| |
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| T4 meet FCC requirements and |
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| are likely to generate less |
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| interference to hearing devices |
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| than phones that are not |
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| labeled. T4 is the better/higher |
Safety | of the two ratings. | |
Hearing devices may also be | ||
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| rated. Your hearing device |
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| manufacturer or hearing health |
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| professional may help you find |
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| this rating. Higher ratings mean |
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| that the hearing device is |
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| relatively immune to interference |
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| noise. The hearing aid and |
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| wireless phone rating values are |
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| then added together. A sum of 5 |
is considered acceptable for normal use. A sum of 6 is considered for best use.
In the above example, if a hearing aid meets the M2 level rating and the wireless phone meets the M3 level rating, the sum of the two values equal M5. This is synonymous for T ratings. This should provide the hearing aid user with “normal usage” while using their hearing aid with the particular wireless phone.