Specifications

Finally, the use of microphones in particular
applications is often facilitated by microphone accessories.
These are mechanical and electrical hardware items that
are often used in mounting and connecting microphones.
Mechanical accessories include various kinds of
acoustic devices such as windscreens and directionality
modifiers. Windscreens, usually made of foam or cloth,
should be used whenever microphones are used
outdoors or subjected to other air currents or rapid
motion. Pop filters are employed when the microphone is
used close to the mouth, such as on lecterns or for
handheld speech. These minimize noise caused by
plosive consonants such as “p”, “b”, “t”, or “d”. Although
such filters are usually supplied with microphones
designed for these applications, additional protection may
be needed in some cases or for microphones not already
equipped. Use only high quality screens and filters to
avoid degrading the sound of the microphone.
There are directional or polar modifiers available for
certain microphones that can change the pickup pattern
from cardioid to supercardioid, for example, or from
omnidirectional to semi-directional in the case of some
boundary microphones. Consult the manufacturer for
proper use of these accessories.
Mounting accessories are of great importance in many
meeting facility sound applications. Stands, booms, and
goosenecks should be sturdy enough to support the
microphone in the intended location and to accommodate
the desired range of motion. Hanging hardware, to allow
microphones to be suspended above an audience for
example, must often include provision for preventing motion
of the microphone due to air currents or temperature effects.
Clips, or stand adapters, may be either permanent or
designed for quick-release. Shock mounts are used to
isolate the microphone from vibrations transmitted from the
mounting surface, such as on a lectern.
Electrical accessories such as transformers and
phantom power supplies have already been described.
In addition, there are a variety of signal processors which
may be used directly in line with a microphone. These can
range from simple low or high frequency filters, to complete
preamp/equalizer/limiter units, though most of these
functions are normally provided by the mixer and
subsequent elements of the audio chain.
Creative use of these accessories can allow
microphones to be mounted with acceptable aesthetic
appearance. Again, quality and reliability should be
primary concerns.
21
MEETING FACILITIES
Audio Systems Guide for
Phelan, Pope, and John “Moot” Courtroom