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Thomann's Cool Online Guides: Dynamic Microphones

2. What is a dynamic microphone?

MicrophoneA device which converts airborne sound into an electrical signal.
Microphones
convert sound waves into electrical energy. Technically, a
MicrophoneA device which converts airborne sound into an electrical signal.
microphone
is an electro-acoustic
Contact MicA microphone designed to be in physical contact with the object producing sound. Vibrations are picked up through direct contact rather than from sound waves in air.
transducer
. When a magnet moves near coiled wire an electric
CurrentThe flow of electrons or charge in an electrical device, measured in amperes (amps); defined as the voltage applied divided by the resistance in the circuit.
current
is induced. This principle is crucial to the design of dynamic
MicrophoneA device which converts airborne sound into an electrical signal.
microphones
. Most
MicrophoneA device which converts airborne sound into an electrical signal.
microphones
mimic the operation of the human ear with a thin
DiaphragmIn a microphone the diaphragm is a thin membrane up to 1" in diameter that converts sound waves into electrical current. A loudspeaker diaphragm does exactly the reverse.
membrane
(diaphragm) that vibrates in response to variations in sound pressure. In a dynamic
MicrophoneA device which converts airborne sound into an electrical signal.
microphone
, a small movable
CoilA length of wire wound around a core to create an inductor or electromagnet. Used in electric guitar pickups where fine enamelled copper wire is wound a few thousand times around a magnetic core. Vibrating strings induce an alternating current in the coil as they modulate the magnetic flux.
coil
of wire is attached to the
DiaphragmIn a microphone the diaphragm is a thin membrane up to 1" in diameter that converts sound waves into electrical current. A loudspeaker diaphragm does exactly the reverse.
diaphragm
near a magnet. As the
DiaphragmIn a microphone the diaphragm is a thin membrane up to 1" in diameter that converts sound waves into electrical current. A loudspeaker diaphragm does exactly the reverse.
diaphragm
moves back and forth in response to incoming sound waves, the
CoilA length of wire wound around a core to create an inductor or electromagnet. Used in electric guitar pickups where fine enamelled copper wire is wound a few thousand times around a magnetic core. Vibrating strings induce an alternating current in the coil as they modulate the magnetic flux.
coil
moves near the magnet, inducing an alternating electric
CurrentThe flow of electrons or charge in an electrical device, measured in amperes (amps); defined as the voltage applied divided by the resistance in the circuit.
current
. This is transmitted through the
MicrophoneA device which converts airborne sound into an electrical signal.
microphone
cable to a preamplifier where its level is boosted for recording or amplification.

Because one
DiaphragmIn a microphone the diaphragm is a thin membrane up to 1" in diameter that converts sound waves into electrical current. A loudspeaker diaphragm does exactly the reverse.
diaphragm
will not give a linear response across all
AudioGenerally used to mean "sound"; technically it describes periodic fluctuations of air pressure or electrical energy at frequencies and amplitudes within the human range of hearing; sound, or electrical energy that represents sound; acoustic, mechanical, or electrical frequencies corresponding to normally audible sound waves.
audio
frequencies, most dynamic
MicrophoneA device which converts airborne sound into an electrical signal.
microphones
have
PeakThe highest point of an audio waveform, or one of the highest points of an audio waveform.
peaks
and valleys in their frequency response and are less sensitive to very high or low frequencies than condenser
MicrophoneA device which converts airborne sound into an electrical signal.
microphones
. This is due in part to the dynamic microphone’s heavier
DiaphragmIn a microphone the diaphragm is a thin membrane up to 1" in diameter that converts sound waves into electrical current. A loudspeaker diaphragm does exactly the reverse.
diaphragm
, and can actually be an advantage in many situations; many manufacturers tailor the limited response of dynamic mics for specific applications. For example, dynamic mics that respond more to lower frequencies may be chosen for
BassThe lowest part of the audio frequency range; in popular music, a (generally) rhythmic, low frequency melodic line emphasising the root notes of the chord progression.
bass
heavy instruments, such as
BassThe lowest part of the audio frequency range; in popular music, a (generally) rhythmic, low frequency melodic line emphasising the root notes of the chord progression.
bass
guitar
CabinetThe housing for a loudspeaker, often abbreviated to "cab".
cabinets
and
BassThe lowest part of the audio frequency range; in popular music, a (generally) rhythmic, low frequency melodic line emphasising the root notes of the chord progression.
bass
drums. Also, some manufacturers have created dynamic
MicrophoneA device which converts airborne sound into an electrical signal.
microphones
with more than one element (the principle behind the two-way loudspeaker in reverse) but these designs tend to be costly and present technical challenges to their designers.

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