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Any device (except for a hearing aid) which helps a hearing impaired person. This can be in the form of a wired pair of headphones, FM wireless headphones, infrared receiver with headphones, etc. The signal sent to the headphones is as direct as possible--that is, extraneous noises and room reverberations are not accepted. Usually a direct feed from the house mixer is used to feed such a system. |
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Download IEC standards, International Electrotechnical Commission standards.
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