Hearing Aid Compatible Phones
        The wireless industry and consumer groups representing the hard of hearing have been working to develop standards and solutions to address difficulties experienced by wireless customers that use hearing aid devices. Much progress has been made and there are now a large number of hearing aid compatible (HAC) devices available to customers. To see a list of hearing aid compatible devices from Total Call Mobile, Inc. ("TCM"),  click here >>
There are two different ratings to consider when picking a hearing aid compatible device:
   1.   M-Ratings - Reduced Hearing Aid Device Interference
        Some customers with a hearing aid device experience a buzzing or whining noise when using a wireless phone. This noise is caused when the electronics within the hearing aid device pick up and demodulate radio frequency (RF) and/or electromagnetic interference (EMI) emitted by the phone. Phones with an M-Rating of M3 or M4 are less likely to generate interference with hearing aid devices. M4 is the better of the two ratings.
        Hearing devices may also be measured for immunity to this type of interference. Your hearing device manufacturer or hearing health professional can help you find results for your hearing device. The more immune your hearing aid is, the less likely you are to experience interference noise from mobile phones and other sources of RF/EMI such as computer monitors and florescent lighting.
   2.   T-Ratings - Compatible with Hearing Aids with Telecoils
        A telecoil is a small device that is built into some hearing aids for use with the telephone as well as assistive listening devices. Not all hearing aids have telecoils. Phones with a T-Rating of T3 or T4 are more likely to work well for people who use hearing aids with telecoils. T4 is the better of the two ratings.
Additional Information regarding Hearing Aid Compatibility
        For more information, visit  www.accesswireless.org.


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