Shure VR300 Bedienungsanleitung

UNIDIRECTIONAL DYNAMIC MICROPHONE

222 HARTREY AVE

EVANSTON, IL, 60204 U.S.A.

AREA CODE 3121866-2200 CABLE: SHUREMICRO

.M.IOTII..O--LI

-.-...-

TWX:

910-231-0048 TELEX. 72-4381

MICROPHONES

AND

ELECTRONIC

COMPONENTS

GENERAL

This microphone is designed especially for use in com-

puter voice recognition applications. It is also suitable

for other uses such as paging, talkback, and other

communication-type applications where excellent voice

fidelity and reduction of background noises are needed.

DATA

SHEET

MODEL

VR300

The frequency response istailored to producean essen-

tially constant output voltage over the voice spectrum

when used close to the sound source. The transducer is

a low-impedance, moving coil type with integral hum-

bucking coil.

The microphone case is aluminum with

black enam-

eled finish. It has a standard 5/a"-27thread suitable for

mounting on a flexible gooseneck, fixed pipe, or micro-

phone stand. The unit is supplied with an attached

two-conductor shielded cable with a built-in strain

relief.

SPECIFICATIONS

+I0

-10

100 1,000 l0,OOO 20,000

FREOUENCY

HERTZ

*Distance from lips to microphone grille

TYPICAL FREQUENCY RESPONSE

FIGURE

Impedance

170 ohms actual

Output Level

OpenCircuit Voltage*

...........

-41.0 dB(8.9 mV)

Power Level**

.................

-59.5dB

1V1100 @bar

**0dB

mWI10 ybar

Phasing

Positive pressure on diaphragm produces positive

voltage on white conductor with respect to black

conductor (see Figure 2)

VOICE HUMBUCKING CABLE

COIL COIL

,-,---------

[,r

;

BLACK

Ti;

-I

WHITE

SHIELD

INTERNAL CONNECTIONS

FIGURE

Hum Pickup

Maximum 15 dB equivalent SPL in 1 mOe field

Cable

1.2m (4 ft) two-conductor shielded

Case

Aluminum with black enameled finish; stainless

steel screen

Dimensions

See Figure

Net Weight

128 grams (4.5 oz)

OPERATION

To obtain the best performance with the VR300, the

microphone must be used in a close-talking manner.

Type

The lips should be as close to the microphone grille as

--Dynamic,Unidirectional (cardioid),Close-Talking comfort permits,with adistance of 1to5cm(0.4to2 in.)

Frequency Response

100 to 7,000

(see Figure 1) providing the greatest discrimination between voice

and background noise.

Copyr~ght

1982,

Shure Brothers

Inc

27A8048

(BL) Pr~nted

U.S.A.

OVERALL DIMENSIONS

FIGURE

ACOUSTIC CONSIDERATIONS

The close-talking characteristics of the VR300

Microphoneare obtained through itstailored frequency

response, directionality, and distance discrimination.

The acoustical elements are designed to optimize per-

formance inthe frequency rangeof I00to7,000 Hz. This

results in substantial reduction of sounds outside the

desired range and proper control of sounds within the

desired range.The microphone rejects noise through its

inherenl

against

favor of

directional properties, and it discriminates

unwanted sounds arriving from a distance in

sounds arriving from a near source.

GUARANTEE

This Shure product is guaranteed in normal use to be

free from electrical and mechanical defects for a period

of one year from date of purchase. Please retain proof

of purchase date. This guarantee includes all parts and

labor this guarantee is in lieu of any and all other

guarantees or warranties, express or implied, and there

shall be no recovery for any consequential or incidental

damages.

SHIPPING INSTRUCTIONS

Carefully repack the unit and return it prepaid to:

Shure Brothers Incorporated

Attention: Service Department

222 Hartrey Avenue

Evanston, Illinois 60204

If outside the United States, return the unit to your

dealer or Authorized Shure Service Center for repair.

The unit will be returned to you prepaid.

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