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AMS22
GENERAL
AMS Series Condenser Microphones function as part of the
Shure Automatic Microphone System (AMS). AMS is a propri-
etary system that lowers background noise by automatically mut-
ing microphones when they are not in use. It offers superior perfor-
mance because it uses both the loudness and direction of the
intended talker. This system is ideal for applications such as con-
ference rooms, legislatures, churches, courtrooms, broadcast
studios, and distance learning classrooms.
CAUTION
Only use AMS microphones with AMS mixers.
Connecting the microphone to other types of mixers or inputs
may damage the microphone.
IMPORTANT
Acoustical reflection from vertical and horizontal
surfaces to the rear or sides of the microphone
inhibits proper gating.
Place the microphone at least 1 meter (3 ft) from the wall
behind it, and at least 0.3 meters (1 ft) in front of any bulky
objects.
For AMS24 and AMS26 microphones, the grille must be at
least 203 mm (8 in.) above any horizontal surface.
For the AMS28, the microphone must be kept at least 76
mm (3 in.) away from any solid surface (table top or edge).
HOW AMS WORKS
Each AMS microphone contains two unidirectional cartridges.
One cartridge faces forward, towards the talker, and the other
faces in the opposite direction, away from the talker. The AMS
mixer gates the microphone while it continuously compares the
relative signal levels from each cartridge. Whenever the signal
from the front cartridge exceeds that of the rear cartridge by 9 dB
or more, the mixer opens the gate and allows signal from the front
cartridge to pass through the system. At all other times, the mixer
gate remains closed.
AMS26
FRONT
CARTRIDGE
AMS MICROPHONE DESIGN
Figure 1
2001, Shure Incorporated
27B3097 (AC)
AMS24
REAR
CARTRIDGE
AMS Condenser Microphones
AMS26
MODEL VARIATIONS
AMS 22 Boundary microphone
Low-profile, boundary microphone for installation on flat sur-
faces such as tables, desks, and lecterns. Operates like a hemi- or
half-cardioid microphone because half the cardioid pattern "disap-
pears" when the microphone is placed on a surface.
Low vibration and hum sensitivity
Hemi-cardioid polar pattern
Low profile design is unobtrusive on conference tables
Surface mounting eliminates comb-filter effects due to surface
reflections, allowing smoother frequency response
AMS24 Gooseneck Microphone
The AMS24 microphone is attached to a thin, flexible 381
mm (15 in.) gooseneck that is designed to be mounted to con-
ference tables, desks, and lecterns.
Low vibration and hum sensitivity
Frequency response tailored for voice
Cardioid polar pattern
Pop-filter grille reduces sensitivity to explosive breath sounds
AMS26 Probe Microphone
The AMS26 Microphone is a probe style unit designed for desk
or floor stand mounting. It is supplied with a Shure A57F Swivel
Adapter.
Low vibration and hum sensitivity
Frequency response tailored for voice
Cardioid polar pattern
Pop-filter grille reduces sensitivity to explosive breath sounds
Mounts on desk stand, floor stand or gooseneck
AMS28 Lavalier Microphone
The AMS28 microphone is designed for chest-worn operation
and is supplied with a matching lavalier assembly.
Low vibration and hum sensitivity
Frequency response tailored for voice
Cardioid polar pattern
Acoustically optimized for chest-worn operation
Extremely flexible long-life cable
User Guide
AMS28
Printed in U.S.A.
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Table of Contents
Related Manuals for Shure AMS22
Summary of Contents for Shure AMS22
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Page 1: User Guide
Pop-filter grille reduces sensitivity to explosive breath sounds AMS26 Probe Microphone The AMS26 Microphone is a probe style unit designed for desk or floor stand mounting. It is supplied with a Shure A57F Swivel Adapter. Low vibration and hum sensitivity... -
Page 2: Microphone Placement
MOUNTING AMS22 To permanently mount the AMS22 to a table, desk or lectern, drill a hole through the surface, then insert a 4-40 screw through it and into the threaded nut in the microphone base. Note: Use the largest flat surface possible. If the mounting sur- face is too small, low-frequency rolloff may occur and the micro- phone may pick up more background noise. -
Page 3: Specifications
Impedance actual at Direct Output of AMS mixer Noise AMS22: 20 dB equivalent SPL typical, A-weighted; 25.5 dB equivalent SPL typical, weighted per DIN 45405 AMS24, AMS26, AMS28: 27 dB equivalent SPL typical, A- weighted; 32.5 dB equivalent SPL typical, weighted... - Page 4 être monté sur une surface telle qu’une table, un bureau, un lutrin, ou au sol. Lorsque la vanne du microphone AMS22 est ouverte, celui–ci fonctionne comme un microphone à configuration semi–supercardioïde parce que la moitié de la con- figuration supercardioïde ”disparaît”...
- Page 5 Installation IMPORTANT Ne pas installer le microphone AMS22 à moins d’1 m d’une sur- face verticale pouvant réfléchir des sons. 1. Placer le microphone AMS22 de façon à ce que les sources sonores désirées se trouvent dans l’angle de 60 de chaque côté...
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Page 6: Spécifications
Type Électrostatique (polarisation d’électret) Réponse en fréquence AMS22: De 50 à 10 000 Hz, mesurée sur une surface plane dure avec une source sonore située à 30 au–dessus de la surface [1a] AMS24,AMS26: De 50 à 16 000 Hz [1b] AMS28: De 50 à... - Page 7 Bauhöhe, das für die Plazierung auf glatten Ob- erflächen wie Tischen, Podien oder Böden gedacht ist. Wenn ein AMS22 öffnet (gatet), verhält es sich wie ein Mikrofon mit „halbnier- enförmiger” Richtcharakteristik, da die andere Hälfte der „Niere” unter der Oberfläche verschwindet.
- Page 8 Aufbau WICHTIG Stellen Sie das AMS22 nur mit einem Mindestabstand von 90 cm vor einer vertikalen, akustisch reflektierenden Oberfläche auf. 1. Positionieren Sie das AMS22 so, daß die Nutzschallquelle sich in einem Winkel von jeweils 60 , bezogen auf die Mikro- fon–Mittenachse, befindet, d.h.
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Page 9: Technische Daten
(Alle Messungen bezogen auf den „Direct Output” des AMS–Mis- chers). Wandlertyp Kondensator (Elektretbasis) Übertragungsbereich AMS22: 50 10 000 Hz, gemessen auf harter Oberfläche bei Schallquellen–Position 30 über Oberfläche [1a] AMS24, AMS26: 50 16 000 Hz [1b] AMS28: 50 16 000 Hz [1c] Richtcharakteristik AMS22: halbnierenförmig [2a]... - Page 10 Los micrófonos de condensador de la serie AMS están diseñados para uso exclusivo con el sistema de micrófonos automáticos (AMS) de Shure, el cual es un método patentado de activación de micrófonos sólo cuando se los necesite. Cuando se usan con las consolas mezcladoras AMS de Shure, estos micrófonos dan un...
- Page 11 Instalación IMPORTANTE No instale un AMS22 a menos de 1 metro de una supervicie ver- tical acusticamente reflectora. 1. Coloque el AMS22 de modo que las fuentes sonoras se en- cuentren dentro de un ángulo de 60 medido a cada lado de la parte delantera del micrófono.
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Page 12: Especificaciones
(Todas las medidas fueron obtenidas en la salida directa de la consola mezcladora AMS) Tipo Condensador (electreto polarizado) Respuesta de frecuencia AMS22: 50 a 10.000 Hz, medidos en el plano sólido con la fuente sonora a 30 sobre el plano [1b] AMS24,AMS26: 50 a 16.000 Hz [1c] AMS28: 50 a 16.000 Hz... - Page 13 AMS22: MICROFONI A EFFETTO DI CONTORNO Il microfono a condensatore modello AMS22 è un microfono com- patto montabile su superfici, progettato per essere posizionato su superfici come tavoli, scrivanie, leggii e pavimenti. Sistemato in posizione, l’AMS22 presenta una caratteristica di rilevamento se-...
- Page 14 Una superficie di montaggio troppo piccola inoltre limita la reiezione del rumore di fondo casuale di bassa frequenza. 3. L’AMS22 può essere fissato in modo permanente ad una su- perficie praticando col trapano un foro nella superficie ed utiliz- zando una vite 4–40 inserita attraverso il dado filettato posizio-...
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Page 15: Dati Tecnici
Tipo A condensatore (polarizzazione ad elettrete). Risposta in frequenza AMS22: Da 50 a 10.000 Hz, misurata col microfono su una su- perficie rigida e la sorgente sonora ad un angolo di 30 gradi sopra la superficie stessa AMS24,AMS26: Da 50 a 16.000 Hz [1c] AMS28: Da 50 a 16.000 Hz... - Page 16 11.1 mm [3b] AMS24 391.3 mm (15- in.) SHURE Incorporated Web Address: http://www.shure.com 222 Hartrey Avenue, Evanston, IL 60202–3696, U.S.A. Phone: 847-866–2200 Fax: 847-866-2279 In Europe, Phone: 49-7131-72140 Fax: 49-7131-721414 In Asia, Phone: 852-2893-4290 Fax: 852-2893-4055 Elsewhere, Phone: 847-866–2200 Fax: 847-866-2585 SIDE VIEW –20 dB...