If you're looking for a cheap way to make calls without having to use your computer then maybe a boom mic would be an option for you. The boom microphone (also known as a phone microphone) is a little different than traditional telephone microphones. For applications which require speech interaction, you'll want to think about choosing between classroom microphones with a boom mic and those with an in-line microphone. A boom mic is basically when the microphone is mounted directly behind or next to your user's mouth, enabling perfect placement right in front of him/her. This is important because it eliminates the problem of one person talking and the other not being able to hear what is being said. There are many boom microphones available on the market.
A typical boom mic consists of a cone shaped body with two equally spaced cones at the ends, so two levels of absorption can be achieved. Usually the boom mic is powered by an electric motor with usually two speeds. This makes it very versatile since you could change the speed to suit different situations. Some people prefer to use a fast boom mic whilst others a slower one. Typically a fast one will give you more projection and a lower volume, while a slow one will produce a higher output and a louder sound.
The boom mic operator is another piece of equipment that is frequently required with the boom microphone. This is a set of speakers attached to boom mic, so that the user can communicate directly with others at the same time. The boom operator is also useful if you need to have directional microphones, or hands free. The boom operator can be either fixed to the boom mic or manually moved around.
The main advantage of boom microphones is that they can pick up the correct sound and pitch from a far distance. On the other hand the disadvantage is that they are usually large and unwieldy, and so take up a lot of room. Because of this some boom microphones have a pole carrying cable, so that the operator can move the boom mic from one place to another. Most boom microphones will require a plug adaptor to use the standard 3 pin plug fitting.
Boom microphones are also known as cardioid, transducer, or wireless microphones, and work on the same principle of transmitting audio through the air to a receiving device. The principle is similar to that used in telephones where a transmitting antenna receives sound and then converts it into sound waves. The principle used in boom microphones is similar. They receive audio from a source through a broadband transducer which has a coil on the front. Then the boom microphone receives the signal and converts it to electrical current which can be amplified.
Boom microphones can be of many types. Some of them have a rotating head to increase their range or may be electronically controlled. Other types of boom mic will have a fixed head which works fine in situations where there is no movement. The fixed boom mic is most commonly used as a monitoring system for a live concert or any other situation where an accurate signal is essential such as fire alarms or police sirens. Some boom mics also have a switch so the operator can switch the microphone from tracking a moving source to a stationary source.
The basic handling of a boom mic is very simple. A cable is connected to both the input and output using a balanced line. An appropriate signal level is required so that the audio produced does not sound distorted. When the boom mic is switched on, a rotating assembly with a diaphragm measures the distance between the source and the receiving diaphragm. If desired level of sound is needed, a notch filter or a bass trap can be used. After the diaphragm is chosen, a level control can be used to set the volume.
The sound produced by a boom mic will depend on several factors such as the quality of the cable being used and the source. With the use of lavalier mics, the distance can be measured in inches while the distance can be measured in yards. Furthermore, some boom microphones are equipped with a noise-reduction microphone, thus reducing background noise. Lavalier microphones use a diaphragm, similar to a piston, which moves back and forth when stimulated by an impulse. The impulses caused by the microphone move the diaphragm up or down, thus affecting the level of background noise.