Radio Broadcasting Services

In the past, long distance communication was in the form of sending telegraphic messages. The information that are sent and received needs to be processed on a method called “Morse code”. 

This is a method of transmitting textual information with varied combinations of ON and OFF which can be generated by tones, light or clicks. 

Any well trained interpreter can decode the message through listening provided that the transmitted data is in the form of a sound. If it is in the form of a light then good observational skill is required.

Have you watched the movie Titanic?

It was a romantic film that involves disaster pertaining to the sinking of the RMS Titanic ship. The movie was released on 1997 and it has achieved great commercial success. 

The movie was awarded with fourteen Academy Award and eleven Oscar Wins. Moreover, it was in the year 1912 when the real tragedy occurred with the RMS Titanic ship. 

This tragic incident was what made marine telegraphy so memorable in the past since it has allowed communications between the operators of the sinking RMS Titanic ship and the rescuers.

From the classic telegraph now comes radio communications and they are introduced in various forms which includes Mobile Communications, Radio Broadcasting, Wireless Networks and etc… 

Among these mediums, the most popular of them all is the television where you can watch news, music, action, drama, comedies, variety show and other newly introduced form of entertainment.

Apart from the television, the following are the other radio broadcasting services that are used by various sectors;

Marine Radio

It is very important for a ship to be equipped with Marine Radio since it serves a lot of purposes such as rescue missions and communications with the harbors. 

However, it is mainly used as a basis of Radar Navigation System for the purpose of avoiding any collisions from obstacles.

Aeronautical Radio

Radio communication is also important in the field of space exploration particularly on air navigation which includes radar, automatic landing equipments and etc…

Government Radio

Almost every radio stations are operated by the federal government serving both civilian and military needs.

Industrial Radio

Industrial machines, medical equipments and scientific tools are using radio waves on their applications.

Amateur Radio

It is also known as “Ham Radio” and considered as the largest non-commercial radio broadcast service. The communication device comes with transmitters and receivers which allow the users to establish communication with one another at an assigned amateur radio band. 

Amateur Radio has been beneficial for rescue operations and emergencies which has already saved countless lives in various instances.

Sound Waves and Vibrations

The primary methods for us to be heard are through talking, singing and shouting. There are even several gadgets or devices that serve as a medium. These are you television sets, radios and other electronic components around your surroundings.

But the question is, how does the sound reaches the listener?

The world that we are living consists of air and it is where the sound of our voices travels and spread around. As the sound travels through the air, it moves similar to a wave. This wave can be illustrated by imagining that you are on a beach viewing the water that moves back and forth.

The waves compose of tiny movements of air and this is referred as the “vibrations”. We can not see with our naked eyes the presence of a vibration but we can sense it through our sense of hearing or it can be felt.

Some might not believe that vibrations can be felt and to prove this claim let’s have a short experiment.

You will simply need a piece of paper and a companion to help you out. If everything is ready, ask your friend or assistant to shout while use the piece of paper to block the sound. You will notice that the paper will move or vibrate. The bigger the paper you use the larger area of the sound waves are blocked which makes the vibration stronger. I guess that this is good enough as a proof that this invisible force can be felt through a medium.

Our electronics technology today uses sounds especially to inform or alert us where we need to take notice about. Your mobile phone will ring when somebody calls you even during the middle of the night. The same thing goes to your clock when you set it up for a certain time to wake you up. Even the toys are now popularly embedded with electronic components to play sounds which add more entertainment of playing them.