categoria attuale
Con le vostre parole...
  • su 10.01.2013

    arxxxjr@axxx.it: "Egregia Thomann, volevo solo ringraziarVi per l’eccellente servizio svolto."

  • su 19.02.2013

    Sconosciuto: "Complimenti, sono al mio primo acquisto ed è stato tutto chiaro, comodo e veloce!"

  • su 02.07.2013

    Sconosciuto: "Spaccate di brutto, cortesia, professionalità, puntualità, qualità e prezzi. Consigliato su tutto ed a tutti!!!!"

Online Guide Reporter Mics
Transducer Types

 

There are three main
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
types used by
MicrophoneA device which converts airborne sound into an electrical signal.
microphones
to convert sound waves into electrical signals, commonly known as ‘dynamic’, ‘condenser’ and ‘ribbon’:


Dynamic

Dynamic microphone

The dynamic
MicrophoneA device which converts airborne sound into an electrical signal.
microphone
is the most basic type, and usually the least expensive. Inside the
MicrophoneA device which converts airborne sound into an electrical signal.
mic
is a small, thin plastic
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
or ‘diaphragm’, that moves in response to
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
waves. When 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, an attached
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 within a magnetic field, which in turn generates an electrical
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
in the wire of 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
. Since the mass of 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
and the voice
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
is actually quite large compared to the energy that’s contained in the acoustic signal, it takes time for 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
to respond to a signal, restricting how fast it can move – this is ‘inertia’ at work if you remember your school physics lessons! For this reason, dynamic mics tend to respond poorly to high frequencies in comparison to other
MicrophoneA device which converts airborne sound into an electrical signal.
microphone
types. This is not too much of a problem for speech though, as it has a much lower
BandwidthThe range of frequencies passed by a bandpass filter (the difference between the upper and lower cut-off frequencies).
bandwidth
than most musical signals. Dynamics also tend to be more robust than other types, and benefit from not requiring a source of electrical power.


Condenser

The heart of a condenser or ‘capacitor’
MicrophoneA device which converts airborne sound into an electrical signal.
microphone
is a pair of metal
PlateType of reverb originally associated with pop/rock recording from the 50s to the 70s. A plate reverb comprises a large metal sheet with transmitting and receiving transducers on each side. The complex signal from the receiver is mixed with the dry signal in order to create a reverb effect. Plate reverb emulations are now common to most electronic/software reverbs, where it is thought to be particularly flattering to vocals.
plates
placed in parallel to each other, spaced at a distance of about two hundredths of a millimetre. One
PlateType of reverb originally associated with pop/rock recording from the 50s to the 70s. A plate reverb comprises a large metal sheet with transmitting and receiving transducers on each side. The complex signal from the receiver is mixed with the dry signal in order to create a reverb effect. Plate reverb emulations are now common to most electronic/software reverbs, where it is thought to be particularly flattering to vocals.
plate
is fixed, and the other is a
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
which is free to move in sympathy with incoming sound waves. When the spacing between the
PlateType of reverb originally associated with pop/rock recording from the 50s to the 70s. A plate reverb comprises a large metal sheet with transmitting and receiving transducers on each side. The complex signal from the receiver is mixed with the dry signal in order to create a reverb effect. Plate reverb emulations are now common to most electronic/software reverbs, where it is thought to be particularly flattering to vocals.
plates
changes, the
CapacitanceThe ability of a conductor to store electric charge. Measured in Farads where capacitance (C) equals amount of charge (Q) divided by voltage (V).
capacitance
varies - remember that physics again! If a polarising voltage is placed across the
CapsuleThe part of a microphone containing the diaphragm which moves or vibrates in response to sound waves.
capsule
, a small electrical signal is then produced which describes the soundwave.

This electrical signal produced is much smaller than that of a dynamic
MicrophoneA device which converts airborne sound into an electrical signal.
mic
, which is why a built-in pre-amplifier is required to bring the signal up to
NormalType of patchbay configuration in which a top row socket is internally connected by default to the corresponding bottom row socket; the connection may be broken by inserting a plug into one or both front panel sockets, depending on the type of normalling in use.
normal
MicrophoneA device which converts airborne sound into an electrical signal.
microphone
level – this should not be confused with external
MicrophoneA device which converts airborne sound into an electrical signal.
mic
pre-amps which are used to bring
MicrophoneA device which converts airborne sound into an electrical signal.
mic
level signals up to line level. Because of the built-in pre-amp, and also the requirement for a polarising voltage, condenser mics need a source of electrical power – this normally comes in the form of ‘phantom’ power which is a back voltage supplied up the cable by the (external)
MicrophoneA device which converts airborne sound into an electrical signal.
mic
pre-amp, although some cheaper models with pre-polarised
CapsuleThe part of a microphone containing the diaphragm which moves or vibrates in response to sound waves.
capsules
can also run on batteries. Condensor mics that use valves for their internal pre-amps need a separate power supply, as phantom power can’t supply the necessary
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
.

Condenser microphone

While the extended frequency response of a condenser is not particularly necessary for speech, their faster
TransientA non-repeating part of a waveform, usually at the very beginning of a note or sound, which is usually of a higher amplitude than the rest of the sound and plays an important part in determining the overall subjective quality of the sound.
transient
response tends to produce a crisper sound, and they are also great when the reproduction of ambient sound is also required.


Ribbon

Ribbon mics are actually a special case of dynamic
MicrophoneA device which converts airborne sound into an electrical signal.
mic
– rather than a
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
attached to a separate
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
, they use a very thin metal ribbon as a
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
. This is suspended between two magnets and its movement in sympathy with sound waves produces an electrical signal, in much the same way as a regular dynamic. Due to the ribbon’s very low mass however, their high frequency response is more comparable with that of a condenser.

Although they are loved for their warm sound, ribbon mics do have some disadvantages though and so are generally not favoured for reporting use – they have relatively low output, are not terribly physically robust, can be easily damaged by phantom power, and they have a figure of eight polar response (a kind of back to back
CardioidA heart-shaped microphone response pattern. In effect, cardioid mics are generally directional, but not strongly unidirectional.
cardioid
– see below). Having said all this, the Coles 4104 ribbon
MicrophoneA device which converts airborne sound into an electrical signal.
mic
with its special noise-cancelling design, is arguably the industry standard for commentators – you may well have seen this in use on TV.

Ribbon microphone

 

[<< pagina precedente] [pagina successiva >>]

 

Contenuti:

[Contenuti] [Introduction] [Transducer Types] [Directional Characteristics] [Specialist Microphone Designs] [Understanding Specifications] [Accessories] [Frequently Asked Questions] [Hotdeals] [Conclusion & Feedback]
Il tuo contatto
Il tuo commento

Come giudichi questa pagina ?