DEAF PEOPLE NOW CAN COMMUNICATE

Do you ever concern about people who are disability? at once ever you think how they enjoy the technology? how the use technology to connect with people in the world? in my opinion each creates in the world deserve to enjoy every development in this world and they also have their right to be with the technology....





Today i want to share with all of you about the TELECOMMUNICATION DEVICE FOR THE DEAF (TDD), this communication has been built for deaf community so they also can be part of the technology...

This technology has been developed by James C. Marsters (1924-2009). he is a dentist and private airplane who become deaf as an infant because of scarlet fever.



A telecommunications device for the deaf (TDD) is an electronic device for text communication via a telephone line, used when one or more of the parties has hearing or speech difficulties. Other names include teletypewriter (TTY) (TTY is also a term used forteletypes in general), textphone (Common in Europe and the UK), and minicom (United Kingdom).

The typical TTY is a device about the size of a typewriter or laptop computer with a QWERTY keyboard and small screen that usesLEDs or an LCD screen to display typed text electronically. In addition, TTYs commonly have a small spool of paper on which text is also printed — old versions of the device had only a printer and no screen.




The text is transmitted live, via a telephone line, to a compatible device, i.e. one that uses a similar communication protocol. In certain countries there are systems in place so that a deaf person can communicate with a hearing person on an ordinary voice phone using a human relay operator. There are also "carry-over" services, enabling people who can hear but cannot speak ("hearing carry-over," a.k.a. "HCO"), or people who cannot hear but are able to speak ("voice carry-over," a.k.a. "VCO") to use the telephone.

Device

There are a number of pieces of additional equipment that can be coupled to telephones to improve their utility. For those with hearing difficulties the telephone ring and conversation sound level can be amplified or pitch adjusted, ambient noise can also be filtered.

The amplifier can be a simple addition or through an inductive coupler to interact with suitable hearing aids. The ring can also be supplemented with extension bells or a visual call indicator.