Shure WH20 Manuel utilisateur

27G3078 (Rev. 7) Printed in U.S.A.

Model WH20 User Guide

GENERAL

The Shure Model WH20 is a rugged, light-weight, dynamic headset microphone that provides

high-qualityvoicepickup.Itfitssecurelyforactivemicrophoneusers,suchasaerobicsinstructors

and musicians, with low visibility for stage appearances. The WH20 is suitable for any voice com-

munications application where comfort and reliability are required.

The WH20 has a cardioid (unidirectional) pickup pattern. This provides greater gain-before-feed-

back and isolation from ambient noise and other unwanted sound sources, such as air-condition-

ing, musical instruments and loudspeakers. A carefully shaped frequency response includes a

voice-frequency presencepeak andalow-frequency rolloff tocompensatefor theproximityeffect

inherent in cardioid microphones during close-talk operation.

An integrated elastic headband secures the headset comfortably. The headband, wireframe, and

gooseneck are adjustable to accommodate any head size or shape. The WH20 is supplied with

a foam windscreen and clothing clip.

FEATURES

• Lightweight wireframe and headband adjust for a secure, comfortable fit

• Extra-strong, small-diameter attached microphone cable resists breakage

• Collapsible microphone boom for easy storage and transportation

• Smooth, natural frequency response comparable to high-quality dynamic hand-held vocal mi-

crophones

• High input clipping level eliminates overload distortion

• Reliable at temperature and humidity extremes

• Supplied foam windscreen and clothing clip

MODEL VARIATIONS

•TheWH20QTR has a right-angle 1/4-inch phone plug for use with Shure Headset Wireless

Microphone Systems, or any unbalanced microphone input.

•TheWH20TQG has a miniature four-pin female connector for direct connection to Shure wire-

less body pack transmitters.

•TheWH20XLR has a three-pin male XLR connector with a convenient detachable belt clip.

MICROPHONE PARTS

The WH20 consists of the following parts:

MICROPHONE PARTS

FIGURE 1

COLLAPSIBLE MICROPHONE BOOM

The WH20 headset features a collapsible boom for shipment and storage. Before wear-

ing the headset, unfold the boom until it snaps and locks into place. Refold for storage

or transportation.

WEARING THE HEADSET

Placetheheadsetwireframe aroundtheheadsothat the wireframeandelastic band are

horizontal across the back of the head and the ends of the wireframe fit over and in

front of the ears. Position the elastic headband either above or below the wireframe to

provide the greatest comfort and stability. The white “SHURE” should face outward.

1. Microphone Cartridge

2. Microphone Boom

3. Hinged Housing

4. Cable and Cable Retainer

5. Wireframe

6. Elastic Headband

ADJUSTING THE HEADSET

• If the headset feels loose or uncomfortable, carefully bend the sides of the wireframe to make it

tighter or looser (Figure 4A). The angle of the wireframe earpieces may also need adjustment

(Figure 4B).

• Adjust the tension of the elastic headband across the back of the head by sliding it up or down

the ends of the wireframe (see Figure 5).

ADJUSTING THE WIREFRAME

FIGURE 4

WEARING THE HEADSET

FIGURE 2 POSITIONING THE MICROPHONE

FIGURE 3

ELASTIC HEADBAND ADJUSTMENT

FIGURE 5

POSITIONING THE MICROPHONE

IMPORTANT: For maximum gain before feedback, position the gooseneck so

that the microphone grille (silver side) iswithin 25 mm (1 inch) of the right corner

of the mouth. Do NOT position it directly in front of the mouth (see Figure 3).

USING THE CLOTHING CLIP

The supplied spring-loaded clothing clip secures the microphone cable to the user's cloth-

ing and keeps it from becoming entangled with the user's movements.

OPERATION

Connect the WH20 to the microphone input of a wireless microphone transmitter or a bal-

anced wired microphone input.

NOTE: The WH20 is a dynamic microphone and has inherently lower output

than condenser microphones. The transmitter gain may need to be increased to

compensate for the WH20's lower output.

WINDSCREEN

If breath noise or “popping” is audible over the sound system, install the supplied

windscreen.

WASHING THE FOAM WINDSCREEN

The foam windscreen protects the WH20's microphone-element from dirt and moisture.

When necessary, it can be removed and cleaned in a mild soapy water solution.

IMPORTANT: Never clean the windscreen with any liquid solution without first

removing the windscreen from the microphone boom.

1. Gently pull the windscreen away from microphone.

2. Immerse the windscreen in mild soapy water and gently squeeze it several times.

3. Rinse the windscreen in clean water and dry it with a clean cloth or paper towel. Allow it to air-dry

thoroughly.

4. When the windscreen is dry, slide it over the WH20 microphone.

WASHING THE ELASTIC HEADBAND

The elastic headband can be removed from the wireframe and hand-washed in a mild soapy wa-

ter solution. To remove and wash the headband, follow these steps:

1. Remove the microphone cable retainer from the wireframe.

2. Slide the elastic headband off the wireframe.

3. Wash the headband and allow to dry thoroughly.

4. Slide the headband around the wireframe to its original position. Reattach the cable with the plastic

retainer.

Note that the elastic headband supplied with the WH20 is not a standard size; head-

bands purchased in stores are too long for this application.

SPECIFICATIONS

Type

Dynamic, Close-Talking

Frequency Response (at 8 mm)

50 to 15,000 Hz

TYPICAL FREQUENCY RESPONSE

FIGURE 6

500 1,000 2,000 5,000 10,000 20,00050 100 20020

–10

+10

Polar Pattern

Cardioid (unidirectional) response-uniform with frequency, symmetrical about axis

TYPICAL POLAR PATTERNS

FIGURE 7

Impedance

Rated at 150 ohms (200 ohms actual)

Output Level (close talked* at 1,000 Hz)

Open Circuit Voltage: . . . . . . . . . . . . . . . . . . . . . . . . . . -67.0 db/Pa (0.45 m)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Pa = 94 dB SPL

*At 12.5 mm (1/2 inch)

Hum Sensitivity

38.4 dB equivalent SPL in a 1 millioersted field

Polarity

WH20QTR as a wired microphone: Positive sound pressure on diaphragm produces pos-

itive voltage on tip with respect to sleeve (ground) of microphone output phone plug

connector.

WH20QTR, WH20TQG used with Shure Wireless Systems:

1/4-inch Phone Jack Receiver Outputs: Positive sound pressure on diaphragm produc-

es positive voltage on tip of receiver output connector.

3-pin XLR Receiver Outputs: Positive sound pressure on diaphragm produces positive

voltage on pin 2 with respect to pin 3 of low-impedance output connector, and on tip of

Aux output connector.

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WH20XLR as a wired microphone: Positive sound pressure on diaphragm produces positive volt-

age on pin 2 with respect to pin 3 of microphone output XLR connector.

Environmental Conditions

Operating Temperatures: -18° to 60° C (0° to 140°F)

Storage Temperatures: -29° to 74°C (-20° to 165°F)

Humidity: 0 to 95%

Cable

Attached 1.22 m (4 ft), small-diameter, shielded, PVC-jacketed, two-conductor.

Cable Connector

WH20QTR: Right-angle 1/4-inch phone plug

WH20TQG: Female 4 pin mini connector (TA4F)

WH20XLR: Three-pin XLR with detachable belt clip

Construction

Black thermoplastic housing; stainless steel grille; black TEFLON®-coated stainless steel wire-

frame; flexible plastic-clad monel gooseneck; rubber/nylon elastic headband

Net Weight (including connector)

WH20: 63 g (2.2 oz)

WH20TQG: 63 g (2.2 oz)

WH20XLR: 98 g (3.5 oz)

CERTIFICATION

Eligibleto bear CE Marking.ConformstoEuropean EMC Directive 89/336/EEC.Meets applicable

tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residen-

tial (E1) and light industrial (E2) environments.

REPLACEMENT PARTS

Cable Connector (for WH20TQG only) ................................................................WA330

Connector Belt Clip (for WH20XLR only) ........................................................ RK200BC

Black Elastic Headband ....................................................................................... RK319

Black Elastic Headband and Wireframe ............................................................ RPM600

Microphone, Cable and Connector Assembly:

1/4-inch (WH20QTR only) ................................................................................ RPM100

Mini, four pin connector (WH20TQG only) ....................................................... RPM102

XLR (WH20XLR only) ...................................................................................... RPM104

Black Windscreens (2) and Clothing Clip ........................................................RK318WS

WIRING DIAGRAMS

FIGURE 8

WH20QTR

WH20XLR

WH20TQG

CARTRIDGE

RED

BLACK

SHIELD

RED

BLACK

SHIELD

RED

BLACK

SHIELD

1/4” CONNECTOR

XLR CONNECTOR

MINI FOUR-PIN CONNECTOR

SHURE Incorporated http://www.shure.com

United States, Canada, Latin America, Caribbean:

5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.

Phone: 847-600-2000 U.S. Fax: 847-600-1212 Int’l Fax: 847-600-6446

Europe, Middle East, Africa:

Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414

Asia, Pacific:

Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055

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