Shure WH20 Manual de usuario

MODEL WH20

DYNAMIC HEADSET

MICROPHONE

Model WH20 User Guide

ã2000, Shure Incorporated

27D3078 (TH) Printed in U.S.A.

English

GENERAL

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

that provides high-quality voice pickup. It fits securely for active microphone users,

such as aerobics instructors and musicians, with low visibility for stage

appearances. The WH20 is suitable for any voice communications application

where comfort and reliability are required.

The WH20 has a cardioid (unidirectional) pickup pattern. This provides greater

gain-before-feedback and isolation from ambient noise and other unwanted sound

sources, such as air-conditioning, musical instruments and loudspeakers. A

carefully shaped frequency response includes a voice-frequency presence peak

and a low-frequency rolloff to compensate for the proximity effect inherent in

cardioid microphones during close-talk operation.

An integrated elastic CROAKIESâheadband 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

SLightweight wireframe and headband adjust for a secure, comfortable fit

SExtra-strong, small-diameter attached microphone cable resists breakage

SCollapsible microphone boom for easy storage and transportation

SSmooth, natural frequency response comparable to high-quality dynamic

hand-held vocal microphones

SHigh input clipping level eliminates overload distortion

SReliable at temperature and humidity extremes

SSupplied foam windscreen and clothing clip

MODEL VARIATIONS

SThe WH20QTR has a right-angle 1/4-inch phone plug for use with Shure

Headset Wireless Microphone Systems, or any unbalanced microphone

input.

SThe WH20TQG has a miniature four-pin female Tini Q-Gâconnector for

direct connection to Shure wireless body pack transmitters.*

SThe WH20XLR has a three-pin male XLR connector with a convenient

detachable belt clip.

English

MICROPHONE PARTS

The WH20 consists of the following parts (see Figure 1):

1. Microphone Cartridge

2. Microphone Boom

3. Hinged Housing

4. Cable and Cable Retainer

5. Wireframe

6. Elastic Headband

MICROPHONE PARTS

FIGURE 1

COLLAPSIBLE MICROPHONE BOOM

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

wearing the headset, unfold the boom until it snaps and locks into place. Refold

for storage or transportation.

WEARING THE HEADSET

Place the headset wireframe around the head so that the wireframe and elastic

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 (see Figure 2).

English

WEARING THE HEADSET

FIGURE 2

POSITIONING THE MICROPHONE

FIGURE 3

ADJUSTING THE HEADSET

SIf 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 wire-

frame earpieces may also need adjustment (Figure 4B).

SAdjust 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).

AADJUSTING THE WIREFRAME

FIGURE 4

English

ELASTIC HEADBAND ADJUSTMENT

FIGURE 5

POSITIONING THE MICROPHONE

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

that the microphone grille (silver side) is within 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

clothing 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 balanced 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.

English

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 water 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. Reat-

tach the cable with the plastic retainer.

Note that the CROAKIESâelastic headband supplied with the WH20 is not a

standard size; CROAKIES headbands purchased in stores are too long for this

application.

SPECIFICATIONS

Type

Dynamic, Close-Talking

Frequency Response (at 8 mm [5/16 in.])

50 to 15,000 Hz (see Figure 6)

Polar Pattern

Cardioid (unidirectional) response—uniform with frequency, symmetrical about

axis (see Figure 7)

Impedance

Microphone rating impedance is 150 ohms (200 ohms actual)

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

Open Circuit Voltage --67.0 db/Pa (0.45 mV)..................... (1 Pa = 94 dB SPL)

*At 12.5 mm (1/2inch).

Hum Sensitivity

38.4 dB equivalent SPL ina1millioersted field

English

Polarity

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

duces positive 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

produces 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 con-

nector, and on tip of Aux output connector.

WH20XLR as a wired microphone: Positive sound pressure on diaphragm pro-

duces positive voltage 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 Switchcraft Tini Q-Gâ(TA4F)

WH20XLR: Three-pin XLR with detachable belt clip

Construction

Black thermoplastic housing; stainless steel grille;black TEFLONâ-coated stain-

less steel wireframe; flexible plastic-clad monel gooseneck; rubber/nylon elas-

tic headband

Net Weight (including connector)

WH20: 63 g (2.2 oz)

WH20TQG: 63 g (2.2 oz)

WH20XLR: 98 g (3.5 oz)

English

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

-- 1 0

+10

TYPICAL FREQUENCY RESPONSE

FIGURE 6

150o

120o

150o

120o

180o

30o

60o

90o

30o

60o

90o

-- 5 d B

--10 dB

--15 dB

--20 dB

500 Hz

1000 Hz

4000 Hz

TYPICAL POLAR PATTERNS

FIGURE 7

CERTIFICATION

Conforms to European Union directives, eligible to bear CE marking; meets

European Union EMC Immunity Requirements (EN 50 082-1, 1992).

REPLACEMENT PARTS

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

Connector Belt Clip (forWH20XLR only) RK200BC.......................

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

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

Microphone, Cable and Connector Assembly:

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

Tini Q-G (for WH20TQG only) RPM102...............................

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

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

English

TIP

SLEEVE

RED

BLACK 4

SHIELD

MODEL

WH20QTR

MODEL

WH20XLR

MODEL

WH20TQG

CARTRIDGE TINI Q-G CONNECTOR

CARTRIDGE

BLACK

RED

SHIELD

CARTRIDGE

RED

1/4” CONNECTOR

XLR CONNECTOR

BLACK

SHIELD

WIRING DIAGRAMS

FIGURE 8

Trademark Notices: The stylized Shure logo and the words “Shure” and “The

Sound of Professionals... Worldwide” are registered trademarks of Shure

Incorporated in the United States. “Teflon” is a registered trademark of E.I.

duPont de Nemours and Company in the United States. “Croakies” is a

registered trademark of Life-Link International, Inc. “Tini Q-G” is a registered

trademark of Switchcraft, Inc.

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

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