Shure MXA910 Handleiding

Shure Microfoon MXA910

Lees hieronder de 📖 handleiding in het Nederlandse voor Shure MXA910 (11 pagina's) in de categorie Microfoon. Deze handleiding was nuttig voor 17 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld

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Pagina 1/11

CEILING ARRAY MICROPHONE

WITH INTELLIMIX®

MXA910

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.

Product specificaties

Merk:	Shure
Categorie:	Microfoon
Model:	MXA910
Kleur van het product:	Aluminium
Breedte:	593.8 mm
Diepte:	593.8 mm
Hoogte:	56.63 mm
Soort:	Conferentiemicrofoon
Stroombron:	Power over Ethernet (PoE)
Connectiviteitstechnologie:	Bedraad
Microfoon mute:	Ja
LED backlight:	Ja
Volumeregeling:	Digitaal
Ruisonderdrukking:	Ja
Aansluiting:	RJ-45
Bit rate:	24 Bit
Sample rate:	48 kHz
Frequentie microfoon:	180 - 17000 Hz
Bedrijfstemperatuur (T-T):	-6.7 - 40 °C
Geluidsdruk niveau (max):	93.25 dB
Gewicht microfoon:	4260 g