Trilokya Bora and Champak Bora of Assam have developed a technique in which the neutral line and earth line of a general electrical system are used to transmit signals of audio/telephone/internet and cable within the house.

Trilokya and his brother Champak wanted to hear the same song at the same time. But as they were in different rooms and the deck cable was short, they couldn’t shift the speakers to the other room. At this juncture they thought about transferring signals to the other room and it struck them that they could use the existing electrical wiring system.

After several attempts they succeeded in transferring audio signals from one room (with a tape recorder) to another (with a speaker) on 1st January 2002.

In general, the electrical wiring system in a house consists of an active, a neutral and an earth line. Trilokya and Champak, both in their early 20’s have developed an adapter through which the neutral line and earth line of a general electrical system are used to transmit audio signals within the house.

Using this technique, audio output from a tape recorder or radio is connected to a plug adapter in which the live point is disconnected. Now the audio signals are available in the neutral and earth wires. The output of the audio signals is collected through the adapter and connected to the audio output device like speakers at any other location within the house i.e., the output of the music system is inputted in the earth and neutral sockets. In whichever room one wants to hear the music, one can insert the two wires into the plug points and the speaker into the earth and neutral socket.

The advantage of this technique is that investment required for communication purposes will reduce drastically. The total cost for re-wiring of audio transmission is reduced and cost of the adapter is only Rs. 15.This innovation has the potential to offer a new low cost solution to related issues in communication technology.

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