The Development Of Internet Radio
History of radio is the history of technologies that generate radio equipment that uses radio waves. Originally broadcast on radio signals transmitted over waves of continuous data either through amplitude modulation (AM) and frequency modulation (FM). A method of sending signal like this called analog. Furthermore, as the development of technology and the internet, the virtue of digital signal which is then change the way the transmission of radio signals.
The Development Of Internet Radio
AM Radio
AM (amplitude modulation) works with the principle of memodulasikan radio waves and waves audio. Both this gelombangg both have a constant amplitude. But the process of this modulation wave amplitude change of carriage (radio) in accordance with the amplitude of the audio waveform.
In 1896 the scientist Guglielmo Marconi, Italy got a patent for a wireless telegraph that uses two circuits. At the time of this signal can only be delivered at close range. However, this started the development of radio technology. In 1897 the Marconi again publish the discovery that wireless signal can be transmitted at a greater distance (12 miles). Furthermore, in 1899 the Marconi managed to do wireless communication between France and United Kingdom United Kingdom Strait passing by using Tesla oscillator.
John Ambrose Fleming in 1904 found that audion tube can be used as a wireless receiver for radio technology. Two years later, Dr. Lee deForest electron tube that consists of three elements (triode audion). This discovery allows the sound waves are transmitted through wireless communication systems. But the signal was captured is still very weak. It was only in 1912 [[Edwin Howard Armstrong find the amplifier radio waves also known as radio amplifiers. This tool works by capturing the electromagnetic signals from radio transmissions and provide the turning signal from the tube. So the signal strength will be increased by 20,000 times per second. Sound is captured also much stronger so that it can be heard directly without using earphones. This discovery later became very important in radio communication system because it is much more efficient than earlier instruments. Despite this patent for amplifiers fall into the hands of Dr. Lee deforest. Until recently the radio amplifier is still a core technology on aircraft radio.
Originally penggunanaan AM radio just for the purposes of wireless telegrams. The first person to do a radio broadcast with the human voice is Reginald Aubrey Fessenden. He did the first radio broadcast of the human voice on December 23, 1900 at a distance of 50 miles (from Cobb Island to Arlington, Virginia) is currently not too many AM radio used to broadcast commercial radio due to poor sound quality.
In 1896 the scientist Guglielmo Marconi, Italy got a patent for a wireless telegraph that uses two circuits. At the time of this signal can only be delivered at close range. However, this started the development of radio technology. In 1897 the Marconi again publish the discovery that wireless signal can be transmitted at a greater distance (12 miles). Furthermore, in 1899 the Marconi managed to do wireless communication between France and United Kingdom United Kingdom Strait passing by using Tesla oscillator.
John Ambrose Fleming in 1904 found that audion tube can be used as a wireless receiver for radio technology. Two years later, Dr. Lee deForest electron tube that consists of three elements (triode audion). This discovery allows the sound waves are transmitted through wireless communication systems. But the signal was captured is still very weak. It was only in 1912 [[Edwin Howard Armstrong find the amplifier radio waves also known as radio amplifiers. This tool works by capturing the electromagnetic signals from radio transmissions and provide the turning signal from the tube. So the signal strength will be increased by 20,000 times per second. Sound is captured also much stronger so that it can be heard directly without using earphones. This discovery later became very important in radio communication system because it is much more efficient than earlier instruments. Despite this patent for amplifiers fall into the hands of Dr. Lee deforest. Until recently the radio amplifier is still a core technology on aircraft radio.
Originally penggunanaan AM radio just for the purposes of wireless telegrams. The first person to do a radio broadcast with the human voice is Reginald Aubrey Fessenden. He did the first radio broadcast of the human voice on December 23, 1900 at a distance of 50 miles (from Cobb Island to Arlington, Virginia) is currently not too many AM radio used to broadcast commercial radio due to poor sound quality.
FM Radio
Radio FM (frequency modulation) is working with the principles similar to that of AM radio, the radio wave modulates (conductor) and the audio waveform. It's just that, on FM radio this modulation process causes a change in frequency.
When AM radio, Armstrong discovered that another problem lies in the type of radio signal is transmitted. At that moment the audio waveform is transmitted along radio waves by using amplitude modulation (AM). This modulation will be very vulnerable to weather disruptions. At the end of 1920-40s Armstrong started trying using amplitude modulation, in which the wave conduction (radio) made constant. In 1933 he finally found a system of frequency modulation (FM) that produce sounds much more clear, and not interrupted by bad weather.
Unfortunately this technology may not necessarily be used en masse. Economic depression in 1930-40s caused the radio industry reluctant to adopt the new system because it requires the replacement of the transmitter and the receiver takes a lot of cost. New in 1940 Armstrong could establish the first FM radio station with the own expense. Two years later the Federal Communications Comission (FCC) allocate some frequency for the FM radio station built Armstrong. Take long for frequency modulation to be used widely. In addition it also failed to patent rights obtained by Armstrong.
It will frustration all the difficulties in the fight for the FM system, Armstrong ended his life in a tragic way to commit suicide. Lucky his wife then successfully fought for the rights of Armstrong for the discovery. It was only at the end of the 1960-70s FM system that really established. Almost 2000 FM radio stations scattered across America, it FM became a supporter of the microwave (microwave), at the end of FM really is recognized as the leading system in the various fields of communication.
When AM radio, Armstrong discovered that another problem lies in the type of radio signal is transmitted. At that moment the audio waveform is transmitted along radio waves by using amplitude modulation (AM). This modulation will be very vulnerable to weather disruptions. At the end of 1920-40s Armstrong started trying using amplitude modulation, in which the wave conduction (radio) made constant. In 1933 he finally found a system of frequency modulation (FM) that produce sounds much more clear, and not interrupted by bad weather.
Unfortunately this technology may not necessarily be used en masse. Economic depression in 1930-40s caused the radio industry reluctant to adopt the new system because it requires the replacement of the transmitter and the receiver takes a lot of cost. New in 1940 Armstrong could establish the first FM radio station with the own expense. Two years later the Federal Communications Comission (FCC) allocate some frequency for the FM radio station built Armstrong. Take long for frequency modulation to be used widely. In addition it also failed to patent rights obtained by Armstrong.
It will frustration all the difficulties in the fight for the FM system, Armstrong ended his life in a tragic way to commit suicide. Lucky his wife then successfully fought for the rights of Armstrong for the discovery. It was only at the end of the 1960-70s FM system that really established. Almost 2000 FM radio stations scattered across America, it FM became a supporter of the microwave (microwave), at the end of FM really is recognized as the leading system in the various fields of communication.
Internet radio
The invention of the internet began to modify the transmission of analog signals used by conventional radio. Internet radio (also known as web radio, streaming radio and e-radio) works by transmitting sound waves via the internet. The principle it works almost the same as conventional radio short wave (short wave), i.e. with the use of the medium in the form of a continuous wave of streaming. This working system allows radio broadcast heard around the world as long as the listener has the internet device. That is why many expats who use internet radio to mengobanti a sense of klezmer in his home country. In Indonesia, generally dikolaborasikan internet radio with analog radio system by radio station teresterial to extend the reach of its service.
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