Shure MXA910 Bedienungsanleitung

Shure Mikrofon MXA910

Lesen Sie kostenlos die 📖 deutsche Bedienungsanleitung für Shure MXA910 (11 Seiten) in der Kategorie Mikrofon. Dieser Bedienungsanleitung war für 5 Personen hilfreich und wurde von 2 Benutzern mit durchschnittlich 4.5 Sternen bewertet

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CEILING ARRAY MICROPHONE
WITH INTELLIMIX®
MXA910
2
MXA910 FOR VOICELIFT APPLICATIONS
CONTENTS
I. MXA910 SPECIAL CONSIDERATIONS 4
Polar Pattern and EQ 4
Automatic Mixing 5
PAG/NAG 6
II. ADDITIONAL TECHNIQUES FOR VOICE LIFT SYSTEMS 8
Room size and acoustics 8
Zoned Loudspeaker System 9
Mix-Minus and AEC Reference 9
III. USEFUL LINKS 11
INTRODUCTION
The Shure MXA910 Ceiling Array Microphone offers the unique advantage of eight independently
steerable lobes, with very narrow pick up patterns. In AV conferencing applications, this allows
the microphone array to be placed as much as four times farther from the sound source than
an omnidirectional microphone, while maintaining a similar ratio of speech vs. ambient sound
performance.
Many customers ask if the MXA910 can also be used in AV conferencing systems that require
voice lift. The answer is “yes.” When compared to an omnidirectional or cardioid microphone, the
MXA910 can provide from 7 to 11 dB additional level of voice lift before feedback starts to occur in
a typical conference room.
For those who have successfully installed and configured voice lift systems in conference rooms
in the past using omnidirectional microphones on the ceiling, or cardioid mics hanging from the
ceiling, you may already know what it takes to accomplish voice lift with the MXA910 in similar
rooms, and achieve even better results.
The implementation of voice lift in an AV conference system is complex. Special considerations
range from separate signal paths for the “transmit audio” and voice lift system, to configuring
virtual references for the acoustic echo cancellers. In addition, there are some specific
considerations when using the MXA910 for voice lift that can help get the most from the system.
It is important to differentiate voice lift from sound reinforcement (SR) and public address (PA).
A SR or PA system is designed to amplify the sound, including voice, to such levels that it can
be understood in very noisy environments and at great distances from the loudspeaker. A voice
lift system, by contrast, is intended to merely restore the natural speech level from a talker to
the farthest listeners in a room. In this case, the reason the farthest listener cannot hear is not
because of loud room noise, but rather because of the natural acoustical loss in level of speech
that occurs when traveling a distance of 25 feet or more to reach the listener. In a properly tuned
voice lift system, you can hear the farthest talkers clearly without even realizing that the system is
turned on. Voice lift systems provide the minimum amount of gain to establish intelligibility.
This document highlights some considerations for voice lift systems that are specific to the
MXA910, as well as the voice lift application for conference rooms in a broad sense. We discuss
techniques that help the system designer and the installer properly design, install, and configure
the system for maximum gain-before-feedback.

Produktspezifikationen

Marke: Shure
Kategorie: Mikrofon
Modell: MXA910

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