kinds of Microphone

Sound Blaster is a mediator that converts air vibrations, the mouthpiece of music or talk to mechanical pressure and then to the efforts of the electric variable equivalent to the type of sound waves that are exposed.

Most important types of speakers are:
1 - Sound Blaster carbon.
2 - Sound Blaster dynamic.
3 - Sound Blaster Saw.
4 - Sound Blaster crystal.
5 - Sound Blaster bar.

Based theories run them all on the properties of electric and magnetic and capacitive.

First: Sound Blaster Carbon:
Consists of a container made of insulating material filled with granules carbon theme inside Two connectors for the two laboratories connected well and installed by slavery metal allows him mounted vibrating according to sound waves that are focused upon by trumpet small occurs multiplied and shaken granular carbon depending on the buckling disk loudspeaker to the inside or outside In response to the intensity of the sound incident, and this is followed by a change in resistance between the poles of the loudspeaker is obtained on the pressure variable ESQ for music and speech on both sides of conductivity and resistance to the granules of carbon are in the habit of 200 to 1000 ohms and the operating current required from 5 to 40 ma and needs to be battery-based pressure from 4 to 8 volts depending on the type loudspeaker user.

Features Sound Blaster Carbon:
1 - the transfer of sounds without distortion with the exception of its creation rumbling continued steady hiss in the Department of output due to the change resistance of carbon granules.
2 - Sensitivity, where pressure caused by simple mechanical pressure on the large electric terminal.
3 - the probability with light weight and cheap price.
4 - HP can be connected directly without the use of a way to ease the pressure generated by the variable on both sides of the connection with the use of a battery to the base pressure of 4 to 8 volts.

Disadvantages:
1 - response to mechanical vibrations, which are exposed.
2 - If the carbon granules adjacent to left for a long time without the use of this and at least as good species.
3 - it needs to an external source of the stream.
4 - sensitive to sounds and responds to the musical tones of the voices of the amount of response

Uses:
Used in wireless devices attached to the mobile stations and fixed wireless as well as business telephone calls.

II: Sound Blaster or a dynamic mobile file:
Very similar to the sound that pumps be used with radios and speakers (headphones radio) to the extent that it may convert any radio headset with a magnet fixed to a dynamic speaker. If we take a practical example, we find that the organs of communication between offices (Alanturkm) and some recording devices used Snap microphone and a speaker at one time by a key chapter in the state to speak or listen.
Consists loudspeaker that of permanent magnet and file moving within the magnetic field and this file is installed in the center of the trumpet is made of paper an ad hoc or mica and stop the theory of runs on the fact that if you move a file inside a magnetic field generated at both ends of a driving force electric impact both move the file or area . In this case we take the theory part of your move the file where it shake trumpet vibrates with the file and moving within a magnetic field vertical movement that results in a variable pressure to get lifted by a small transformer and then connected to the amplifier.

Features dynamic loudspeaker:
1 - characterized by high sensitivity to low frequencies.
2 - light weight and small size in the case of non-use of a loudspeaker Kamicrawfon dynamic.
3 - is not affected by bad weather Kalrtobp or heat or wind.
4 - does not require an external power source (battery-based )

Disadvantages of dynamic loudspeaker:
Take a fundamental flaw of this loudspeaker is the need for an adapter connected to a ratio Uplander specific rolls in addition to the high price.

Uses:
Used in audio recording studio Hat because of the high sensitivity as well as business telephone and communications devices wired between the offices.

III: Sound Blaster Saw or a condenser:
Consists loudspeaker this intensive variable has installed a special panel hard made of metal panel mobile aluminum flexible and depend theory run on change Saw that follows change the distance between the inspired intense as it is known that the capacitance is inversely proportional to the distance between the two tables, die, if increased the distance between the panels increased capacity.
In practice, the distance between the tables in this intense loudspeaker about part-thousandth of an inch. When a vibration plate which is a mobile disk capacity loudspeaker change depending on the severity of the incident sound and get the parties to the intense pressure variable is equivalent to sound vibrations experienced by the loudspeaker. Due to the lack of sensitivity of the loudspeaker, it is not used in production processes of public voice and only used for the purposes of inspection and testing labs, and as the basis for pressure in the case of the operating range between 100 to 200 volts across the resistance of the succession of high value. And the loudspeaker is enlarged and the unity of its own primary together as one unit. The production is currently possible with capacitive microphones are attached to high sensitivity in the forefront of modern cassette recorders.

IV: Sound Blaster crystal or crystal: found some crystals of natural quartz and Rochelle salts electrical properties that could be applied as it is to expose these crystals pressure generates mechanical power by the driving force equivalent to the amount of mechanical power by the incident. And this was making the loudspeaker of a crystal that does not need to press a key to run or transformer and depends on this property.
It consists loudspeaker of this type in a cell cell of two slices of crystals, each with an area of about 1.4 mm square and thickness of each about 2 mm almost proved so touching the back of each with the other relates to the center of the crystal lightning metallic flexible transmit mechanical vibrations that are exposed to the crystal by vibrating electric generating pressure variable fit the severity of the incident sound and are transported to the amplifier in the normal way without using any direct way to transform (adapter). The reluctance of high enables us to connect to the network of the ruling of the speaker with extensive use of the entry capacity of 0.02 to 0.05 and resistance of the leaky network of 2 MB to 5 MB, and cable Veiled conducts obscured good chassis.

Features Sound Blaster Crystal:
1 - high sensitivity and should not be directed towards the speaker or musical instrument.
2 - does not require an external battery.
3 - not much affected by external mechanical vibrations.
4 - light weight small in size.

Crystal defects loudspeaker:
1 - crystals are affected by much higher temperature might damage if the increased temperature of 125 degrees - so should be kept away from any influential can radiate heat to it.
2 - affected by the weather if there is any break or crack Blah external crystal as a result of absorption of moisture to the air.
3 - Do not allow entry to any pressure no matter how low electric crystals, because this is causing the damage and therefore should not test ends in a Lout by measuring the resistance also occurs in the test case file mobile dynamic loudspeaker.
Uses:
Very common to use audio recording studios and radio recording devices, as well as small devices with magnification.

V.: Sound Blaster bar:
The speaker of this improvement to the loudspeaker dynamic has been named a loudspeaker bar in view of the composition as it is composed of bar Mar very thin moves freely inside a magnetic field to a strong magnet to forward or backward with the reduction driven by lateral movement and as long as it is known that if you move the connector inside The magnetic field generated by the driving force splash, and we believe that we are exposing the tape to air vibrations caused by the ripples get audio on a terminal on the power of driving a small electric variable equivalent to the sound waves and then get them to network Magnifier trucks according to the case of the dynamic loudspeaker.

Features speaker bar:
1 - characterized by relative sensitivity and frequency response satisfactory.
2 - does not require an external power source.

Disadvantages:
1 - directional die it only responds to sound waves that spread directly to him.
2 - em Worked With it, relatively little of this and it needs to zoom in preliminary stages and original.

Uses:
Use of radio and movie studios and some practical purposes.