KASET OKREK

Origins and History of Type-Type of Microphones (PART 3)

(Our Tech Blog) This post continues my previous post. If you have not read it silhkan read on Origins and History of Type-Type of Microphones (PART 1) and Origins and History of Type-Type of Microphones (PART 2)

7. Ribbon microphone

Ribbon microphone is a microphone made of ribbons that are very sensitive and thorough. The workings of the microphone is guided by a central band of thin metal foil that is attached to a magnetic field. That captured the sound vibrations cause movement of the ribbon. The movement resulted in changes in the magnetic field which then generate electrical signals. Therefore ribbon microphone at the beginning of its appearance is a microphone that can display the most natural sound, the recording industry and broadcast immediately take advantage of this microphone at the beginning of the 1930s. Microphone does not require a power supply or batteries to operate. Large growth on the type of microphone can be seen from the large public interest in home recording with a ribbon microphone that provides high-quality microphones made by companies such as AEA Royer, who later became the standard for the studio with Chinese companies such as Sontronics, SE and the Golden Age.

8. Shotgun Microphone MC

Michrophone is shaped like a slim and long-barreled rifle that is often found to be characteristic Condercer Microphune. Sharpen its sound so weak and distant voices will be captured by the microphone is therefore with a shotgun mic does not need to be close to the target object because the grasp of the mic. Directional shotgun straight (one way).

9. PERSONAL MICROPHONE

Lavalier mic / personal mic / clip-on mic is a voice recorder which is small and the brace is used mostly for interviews in studio.lavalier's "mic clip", mic bias that has the characteristics of omni, in European countries popularly known as "Lapel". On call as usual clipped Lapel collar, coat or stick behind the tie. Installation distance of about 6 to 8 inches below the chin about 25cm - 30 cm.

10.HANDHELD MIC

This microphone to record it the same way with another mic but the mic is designed larger handhelds. The size of this mic for hands and used for the purposes of the field at the time of interview coverage. Dynamic mic characteristics Hendheld michrophone muffle its sound sharp desis.suara to reduce noise recorded major, so not eliminate noises.

11.CONTACT MIC

This thing is basically a microphone. But, in contrast to the usual functions of microphones used for singing, this one is able to tap the sound level is more fragile. Contact Mic is designed to be able to penetrate the sound wave damping is virtually unable to capture sound waves below the surface of certain solid. Thus, this microphone can also be used as a bomb detector.

This thing is made integral with the contact element, and has an internal automatic gain control so it no longer requires the adjustment knobs. Contact Mic is designed to convert minute vibrations to sound waves and then can diterjermahkan into the audio band can be heard through headphones or other sound receiving equipment.

Thus, these objects can provide information about what is strange is happening.For countries that are vulnerable to bombs (and earthquake), this tool can be very useful. Certainly it would be much needed for corporate purposes and in institutions or security research, although it was likely used for personal needs. Well, who knows there are curious to know whether the mysterious neighbor who lived next door was a terrorist.

12.BOUNDARY EFFECT MIC

This unique metal screen not simply perforated but louvered at a little angle to redirect ultra-low frequencies that pass through the blast of breath side of the screen. This process does not attenuate high frequencies, as fabric screens do, and leave the vocal performance unaffected but without annoying low frequency "appears" It's also built to last and will take more abuse than a traditional fabric shield, so it is very good for commercial applications

14.Bidirectional Microphones

Bidirectional microphone. The third type of microphone pattern of polarity is bidirectional (also known as Figure 8). A bidirectional mic will take votes from both the front and rear, but not from all the way around. They do not take votes from both sides at all. Bidirectional mics are often used to play the instrument miking two parts simultaneously, such as the horn. When a bidirectional mic is placed between two horn players with a mic side perpendicular to the players, it will take the sound of horns and very little else. Bidirectional mics are made in three types of microphones: dynamic, condenser, and ribbon.

15.Unidirectional mics

A unidirectional microphone is sensitive to sound from one direction. The diagram above illustrates some of these patterns. Microphone facing upwards in each diagram. The intensity of the sound of certain frequencies is plotted for radial angles 0-360 °. (Professional diagrams show these scales and include multiple plots at different frequencies. The diagrams are given here only give an idea of the typical pattern of shapes, and their names.)

16.Omnidirectional

An omnidirectional (or nondirectional) microphone response is generally considered to be a perfect sphere in three dimensions. In the real world, this is not terjadi.Seperti directional microphone, the polar pattern for an "omnidirectional" microphone is a function of frequency. Microphone body is not infinite and small, as a result, he tends to get his own way to the sound coming from behind, causing a little flattening of the polar response. Evenly increased in line with the diameter of the microphone (assuming it is cylindrical) reaches the wavelength of the frequency concerned. Therefore, the smallest diameter microphone will give the best omnidirectional characteristics at high frequencies.

Origins and History of Type-Type of Microphones (PART 3)

8. Shotgun Microphone MC

9. PERSONAL MICROPHONE

10.HANDHELD MIC

11.CONTACT MIC

12.BOUNDARY EFFECT MIC

16.Omnidirectional

Origins and History of Type-Type of Microphones (PART 2)

(Our Tech Blog) This post continues my previous post. If you have not read it silhkan read on Origins and History of Type-Type of Microphones (PART 1)

4. capacitor microphone

The capacitor microphone is a microphone made of a metal diaphragm, is attached to a metal plate static with very close distance, so that both isolated and resembles the shape of a capacitor. The existence of sound vibrations cause the diaphragm to move. Diaphragm which moves lead to a change in separation distance between the diaphragm with a static plate so that the resulting change in capacitance value. This capacitor microphones require a constant DC voltage which is connected to a diaphragm and passes through a static plate load resistor, so the microphone voltage can vary with changes in air pressure caused by sound vibrations.

5. Elektret microphone

Elektret microphone is a special type of capacitor microphone which has its own sources of content that does not require external power supply. The source charge comes from a mass storage device is made of Teflon. Teflon material is processed in such a way so as to capture the charges remain in large quantities, then keep it for an unlimited time. Thin layer of Teflon on a metal plate attached to the static and contain negative charges in large numbers. Charges are trapped on one side, which led to the electric field in the slit-shaped capacitor. Sound vibrations that are changing the air pressure in it so it makes the distance between the diaphragm and the metal plates are also changing static. As a result, the capacitance change and the terminal voltage of the microphone was also changed.

6. piezoelectric microphone

Piezoelectric microphone is a microphone made of crystalline active ingredient. This material may cause the voltage itself while capturing the vibrations from the outside so it does not require power supply. How it works is that the crystal is cut to form an incision in certain fields, then attached to the electrodes or plates so it will show piezoelectric properties. Crystal will change shape when you get a pressure so that the charge transfer will occur shortly in the crystal structure. Charge transfer results in a potential difference between the two plates of the slab. Interestingly, these crystals can be directly received sound vibrations without having to be formed into a diaphragm, so the response frequency will be better than other microphones, although the level of output is much lower, at less than 1 mV.

Wait on the next post :)

Origins and History of Type-Type of Microphones (PART 2)

(Our Tech Blog) This post continues my previous post. If you have not read it silhkan read on Origins and History of Type-Type of Microphones (PART 1)

4. capacitor microphone

Wait on the next post :)

Why Play Games Too Old Leads Death?

(Our Tech Blog) Chris Stanifort, British adolescents aged 20 years, must be dying because of playing the game non stop for 12 hours. An autopsy to make sure Chris died of a blood clotting condition.

Quoted detikINET from dailymail Monday (08/01/2011), Chris died of exposure DVT or deep vein thrombosis. DVT is a blood clot that develops in the veins in the body that makes the patient feel pain.

The condition can cause serious complications if the clot into the bloodstream. If so, there could be a fatal blockage in the heart of the so-called pulmonary embolism.

DVT usually occurs when people do not move in a long time, such as sitting too long without doing other activities. Chris himself was often spend hours and hours non stop to play the game on the Xbox.

"Chris lived for his Xbox. If you've started to play the game, he can continue playing for hours," said David, Chris's father.

Chris David's death makes his true concern for the child in good health. He was trying to warn other parents about the dangers to children if they play the game very much.

Why Play Games Too Old Leads Death?

How Origin History of AC?

(Our Tech Blog) Beginning of the AC (air conditioner) has been started since Roman times is to create a reservoir of water flowing in the walls of the house thus lowering the temperature of the room, but then only certain people who can build it because the cost is very expensive because it requires water and also buildings that do not usual. Only the kings and rich people who can build it.

Quoted from kaskus, only later in 1820 the British scientist named Michael Faraday discovered a new way to cool the air by using ammonia gas, and in 1842 a doctor found a way to cool the room in the hospital who was in Florida Apalachicola United States. Dr.Jhon Gorrie is found and this was the forerunner of the technological AC (air conditioner) but unfortunately he died before complete in 1855.

Willis Haviland Carrier an engineer from New York United refine the discovery of Dr.Jhon Gorrie but AC is used instead for the benefit or convenience of humans but for the purposes of printing and other industries.

The use of air conditioning for new housing was developed in 1927 and first used disbuah house in Mineapolis, Minnesota. Currently AC is used in all sectors, not only industry but also has been in office and residential with a variety of forms ranging from large to the kecil.semuanya still serves the same which is to cool the temperature of the room so that people feel comfortable.

When summer comes, we usually always familiar with that name is also a fan or AC (Air Conditioner).
Therefore, the coolness caused by the air fan and air conditioning is needed to reduce the heat that is sometimes excruciating.

Because of that, thank John Gorrie who sparked the idea of making air-conditioning. Because, with the cool air conditioning, we need not feel pain because of the heat which sometimes makes the body feel like a sticky due to sweat dripping. But, do you know if John created the AC because it was inspired by concern for the sick?.

Once, John is actually a doctor United States citizens. The idea makes cooling engine starts from the number of patients suffering from malaria or other disease of the symptoms of high fever. When the air was hot, so make the patient uncomfortable. So, who was born in Charleston, South California, October 3, 1802 is rack my brain how to keep the patient's body temperature can go down. After seeing the fan in front of him, he found the idea. He put a chunk of ice in front of the fan, so cold the ice can be spread by wind from the fan.

Sparked the idea, then John intends menyeriusi manufacture of engine cooling (AC). Then, in 1844, he graduated from medical and surgical science in the city of New York is designing and developing ice-making machine experiments. Creation engine is based on the laws of physics that heat always flows from a gas or liquid that is hotter toward the gas or fluid cooler. The machine works by compressing the gas (compress) so it gets hot, then gases are channeled to the coils for reduced pressures (decompress). As a result, the air became cold.

To develop the discovery, in 1845, Gorrie decided to stop the practice as a doctor. Six years later, he successfully received a patent which is the first patent issued for an engine coolant. This was originally found that the engine coolant is now known as the Air Conditioner.

How Origin History of AC?

Origins and History of Type-Type of Microphones (PART 1)

(Our Tech Blog) Good morning loyal readers. Yes I'm bored with that info-tech that it wrote? Okay, in this post I will discuss the history and types of microphones. This article I got from the largest forum in Indonesia, namely kaskus.us

HISTORY

Origin History of Microphone is a type of transducer that converts acoustic energy-the energy (sound waves) into electrical signals. The microphone is one tool to help human communication. Microphones are used in many devices such as telephones, tape recorders, hearing aids, and forced-air radio and television.

The term comes from Greek microphone microscope which means small and the font, which means voice or sound. This term originally referred to the hearing aids for low-intensity sound. The discovery of the microphone is very important in the early development of the telephone. At the beginning of his invention, the microphone used on the phone, and with a growing time, the microphone used in radio transmitter to the various other uses. The discovery of a practical microphone is very important in the early development of the telephone. Several inventors have created primitive microphones prior to Alexander Graham Bell.

In 1827, Sir Charles Wheatstone had developed a microphone. He was the first to create a "microphone phrase." Subsequently, in 1876, Emile Berliner invents the first microphone used as a telephone voice transmitter.'s First commercially practical microphone was the carbon microphone which was found in October 1876 by Thomas Edison. In 1878 , David Edward Hughes also took part in the development of the carbon microphone. Microphone carbon is experiencing growth until the 1920's.

James West and Gerhard Sessler also plays a major role in the development of the microphone. They patented their findings that electric microphone in 1964. At that time, the microphone offers something that is not owned by a microphone before, namely a low price, so it can be accessible by all consumers. Another part in the history of revolusionalisasi microphone is a microphone in the industry which allows the public to get it. Nearly one million microphones produced annually. Then in the 1970s, dynamic microphones and condenser microphones began to be developed. This microphone has a high level of sensitivity. Therefore, until now the microphone is used in the broadcasting world.

USEFULNESS

Microphones are used in some devices such as telephones, tape recorders, hearing aids, forced-air radio and television, and so on. Basically the microphone is useful for making a low-intensity noise becomes louder. Selection of the microphone must be done more carefully. This is done to prevent the microphone from the reduced ability of the optimal performance. To be effective, the microphone used must be balanced between the source of the sound to be sampled, such as the human voice, musical instruments, sound of a vehicle, or the other with a sound system that is used as sound systems for live music, recording equipment, motorcycle GP racing arena, and so on

CHARACTERISTICS

Microphone characteristics that must be considered when choosing a microphone is:

1. The principle of the workings of the microphone

2. Area frequency response sound is capable of sampled microphone

3. Angle or direction of the microphone sampling

4. The resulting electrical signal output microphone

5. Physical shape microphone

TYPES

1. Carbon microphone

Carbon microphone is a microphone made of a metal diagrams located at one end of a cylindrical metal box. The workings of the microphone is based on the variable resistance where there is a link that connects the diaphragm with a grain of carbon in the microphone. Changes in the existing sound vibrations will cause the resistance value changes as well, resulting in changes to the microphone output signal.

2. Variable reluctance microphone

Variable reluctance microphone is a microphone made of a diaphragm made from magnetic. How it works based on the magnetic diaphragm movement. If the air pressure in the diaphragm increases because of the sound vibrations, the air gap in the magnetic circuit will be reduced, consequently diminishing reluctance and cause changes in the magnetic concentrated magnetic structure. These changes lead to changes in the signal coming out of the microphone.

3. Moving coil microphone

Moving coil microphone is a microphone made of induction coil that rolled on a cylinder made from non-magnetic and attached to the diaphragm, and then installed into the air gap of a permanent magnet. While the wire-wire electrical connector attached to the diaphragm is made of nonmetallic materials. If the diaphragm moves because of the sound waves are captured, then the coil will move back and forth within the magnetic field, so comes a change that passes through the magnetic coil and generate electrical signals.

Wait for the next posts :)

Origins and History of Type-Type of Microphones (PART 1)

HISTORY

USEFULNESS

CHARACTERISTICS

Microphone characteristics that must be considered when choosing a microphone is:

1. The principle of the workings of the microphone

2. Area frequency response sound is capable of sampled microphone

3. Angle or direction of the microphone sampling

4. The resulting electrical signal output microphone

5. Physical shape microphone

TYPES

1. Carbon microphone

2. Variable reluctance microphone

3. Moving coil microphone

Mobile Phone Sales Up, Profits Samsung was down

Mobile Phone Sales Up, Profits Samsung is down

(Our Tech Blog) Although successful in increasing sales of cell phone up to 43 percent, South Korean electronics giant Samsung Electronics have to close the second quarter with declining profits.

Throughout the second quarter ended June 30, Samsung has recorded total revenue of 39.44 trillion won (USD37, 4 billion), up 4 percent over the same period last year.

Excerpted from the okezone, unfortunately, in the second quarter corporate profits, which totaled 3.51 trillion won ($ 3, 3 billion), have declined by 18 percent from 2010. Reuters reported on Saturday (30/07/2011).

Samsung's handset business unit is helping the company increase revenue in quarter two. They claim cell phone sales up 43 percent over a year "thanks to the many requests ~~smartphones Galaxy II~~ and other mobile devices."

Yes, the Galaxy II, which was released in Asia late last April was a phenomenal record sales. Only in the past 85 days since released to the market, Galaxy II was recorded sales to five million units.

Based on data from research firm Strategy Analytics, Samsung is now the world number two smartphone vendor after Apple, shifting the position of Nokia fell to third. That's thanks to handset sales to reach 74 million units, in which 19 of which are smartphones.

But Samsung's success in its mobile business unit does not occur in other business units, following a low level of demand for chips and televisions. A few days ago, Sony Corp. and Panasonic also claim that TV sales were declining significantly.

Mobile Phone Sales Up, Profits Samsung was down

Is Nokia phone WP7 Reinforced Snapdragon Processor?

(Our Tech Blog) Nokia certainly adopt Windows Phone 7 operating system as the mainstay. On the other hand, Qualcomm claimed was close with Microsoft to develop new phone. Does that mean Nokia will use Qualcomm's Snapdragon chips?

Snapdragon processor has become one of the chipset with a pretty good ability. Besides having a high performance, this product is also not greedy for power resources, thus saving battery claimed more than similar products.

No wonder then if the processor type is widely used in upper-class processors for a number of smart phones, not just Andoroid but also on HTC's Windows 7 Phone HD7. And what about Nokia?

"Currently we are closely working with Microsoft to optimize the ability Snapdragon on Windows Phone 7 Manggo," said Matt Grob, Senior Vice President of Engineering Qualcomm.

Many sources say, the proximity of Qualcomm with Microsoft is allegedly closely associated with the development of Windows 7 Phone for Nokia. Really?

"Nokia is a big producer, would be delighted if we could cooperate with them, but until now there has been no discussion that leads to it," said Grob, on Qualcomm's Editors Day event which was followed detikINET, 27-28 July 2011 in San Diego, United States States.

Is Nokia phone WP7 Reinforced Snapdragon Processor?

Waw! Apple is more "rich" from the U.S. government ?

(Our Tech Blog) Perhaps, the government of the United States (U.S.) need to sell Apple's iPhone or iPad. Profits from sales of gadgets are making Apple's cash carrying more than the U.S. government's money.

According to recent data from the U.S. Treasury Department, the cash is now owned by the government of uncle Sam is USD 73.8 billion. The amount is lower than Apple's cash.

As reported by CNN and quoted on Saturday (07/30/2011), Apple has the cash as much as USD 76.2 billion at the end of June. The amount is calculated based on the latest financial statements.

Indeed, at a time when the U.S. government continues to make big spending, Apple is enjoying extraordinary income from the sale gadgetnya. iPhone, iPad up the iPod, everything is still selling well.

With cash reserves are abundant, there is speculation Apple will do the acquisition of another company. But they said it would be careful with his money.

"We will not let us lose cash by making acquisitions that stupid," said Apple CEO, Steve Jobs, some time ago.

Waw! Apple is more "rich" from the U.S. government ?

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