SigNET AC AMD/P Tabletop Gooseneck Paging Microphone with Push to Talk for SigNET PDA Induction Loop Systems
The SigNET AC AMD/P Tabletop Gooseneck Paging Microphone with Push to Talk for SigNET PDA Induction Loop Systems is a cardiod gooseneck microphone designed for use with SigNET AC's PDA series induction loop system. Terminated with a mono 3.5mm Jack plug.
A gooseneck condenser microphone with selectable chime function. Microphone connection to the base is via XLR and output is on XLR at the rear. Power is provided to the microphone capsule either from 2 x AA batteries in the base or from 5Vdc via the supplied USB lead. The base is also home to a latching paging button on top and a chime section on the underside. DIP switches offer a selection of chime settings, governed by a rotary volume control. Designed for remote paging and announcements.
The most common microphone used in induction loop systems are 'electret' lecturn, handheld, boundary and lavalier microphones as they have the highest tolerance of magnetic feedback. Best practice (though not always possible) is to place the microphone(s) as close as possible to the speaker.
Dynamic microphones should not be used as they contain moving coil magnets which can be affected by the magnetic field generated by the loop.
A method that is sometimes suggested for overhead placement is a ceiling-mounted boundary microphone. This should be used with caution as (a) microphone too far from the desired sound source, especially in the case of a high ceiling and (b) the ceiling in buildings of modern construction is often an extremely noisy location due to air handling noise, lighting fixtures and building vibration.
Phantom power is provided on all PDA amplifiers so electret microphones with batteries are not necessary.
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