Multi-functional communication terminal device and communication relay device for use in noise environment

A multi-functional communication relay device for use in a noisy environment, comprising:

• a wireless communication device for enabling speech and data communication with an external wireless communication network through a base station;
• a registering device for wirelessly registering information about a cellular phone of each individual worker who is positioned within a company as a predetermined code;
• and
• a cellular phone communicating device for enabling communication with the cellular phone and communication between the cellular phones based on the predetermined code registered by the registering device.

A multi-functional communication terminal device for use in a noisy environment, comprising:

• a cellular phone which is hand-carried by each individual worker within a company;
• an authentication device installed in the cellular phone for transmitting a predetermined code to a multi-functional communication relay device to receive authentication for a registration of information about the cellular phone from the multi-functional communication relay device;
• and
• a communication terminal device mounted on the worker's ear,
• wherein the communication terminal device includes:
• a short-range communication device for enabling shot-range communication with the cellular phone;
• a speech recognition device for recognizing a speech of the worker and converting the recognized speech into character data;
• and
• a microphone for receiving a speech of the worker and a speaker for outputting a speech of a counterpart worker or music to the worker.