Dynamic Microphone
Dynamic Microphone:
The dynamic microphone can also be
called as moving coil microphone, which
is shown in Figure.
It is working
under the principle of electromagnetic
induction. This works on the basis of the
following principle which states that “in
a magnetic field a conductor is placed in
such a way that it cuts the magnetic field
and then inducing an electrical field in it”.
In dynamic microphone, between
the two-strong magnetic ends a coil spring
is placed. A diaphragm is attached along
with this coil spring. The diaphragm is
firmly attached to the body of the micro-
phone. The coil spring laminated so it
won’t have any contact with other parts.
This total setup is fixed in a case.
When sound waves strike the dia-
phragm, the coil attached to it will vibrate
front and back. Due to this, the coil cuts
the magnetic field and creating electrical
signal. The strength of this electrical signal
and frequency decides the true deflection of
vibration occurred in the diaphragm. This
electrical signal is the output of the micro-
phone. The dynamic microphone will give
equal frequency response for the sound
waves in the range of 50 Hz to 10000 Hz. It
is made up of low impedance material.
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