Specifications

Proper operation of the microphone requires correct
connection to the sound system with quality cables and
connectors, and correct phantom power if a condenser is
used. Use a shock mount to control mechanical
noise from the lectern itself. Some microphones are
equipped with low-cut or low-end roll-off filters, which may
further reduce low frequency mechanical or acoustic
noise. Goosenecks should be quiet when flexed. It is
strongly recommended that a pop filter be placed on the
microphone to control explosive breath sounds, especially
when using miniature condenser types.
Meeting Table
The desired sound source at a meeting table, is a
speaking voice. Undesired sounds may include direct
sound, such as an audience or loudspeakers, and ambient
noise sources such as building noise or the meeting
participants.
A boundary microphone is the physical design best
suited to this application. This will minimize interference
effects due to reflections from the table surface and
will also result in increased microphone sensitivity.
A condenser type is the most effective for this configura-
tion, due to its high performance and small size.
The frequency response should be slightly shaped
for the vocal range and will usually benefit from a slight
presence rise. A unidirectional (typically, a cardioid)
pattern will give the broadest coverage with good
rejection of feedback and noise. Finally, the microphone
should have a balanced low-impedance output, and
moderate-to-high sensitivity.
Placement of the microphone should be flat on
the table, at a distance of two to three feet from, and aimed
towards the normal position of the talker. If possible, it
should be located or aimed away from other objects and
from any local noise such as page turning. If there is more
than one distinct position to be covered, position additional
microphones according to the 3-to-1 rule.
The microphone should be connected and powered
(if necessary) in the proper fashion. If the table itself is a
source of noise or vibration, isolate the microphone from
it with a thin foam pad. A low-frequency filter may be a
desirable or even necessary feature. A pop filter is not
normally required. Make certain the microphones are
never covered with papers.
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MEETING FACILITIES
Audio Systems Guide for
Good technique for lectern microphone
use includes:
• Do adjust the microphone position for
proper placement.
• Do maintain a fairly constant distance of
6 to 12 inches.
• Don’t blow on microphone, or touch
microphone or mount when in use.
• Don’t make excess noise with materials
on lectern.
• Do speak in a clear and well-modulated voice.
Good technique for meeting table
microphone use includes:
• Do observe proper microphone placement.
• Do speak within coverage area of the
microphone.
• Don’t make excess noise with materials
on table.
• Do project the voice, due to greater
microphone distance.
Table mic