Shure ES615 User Guide

222 HARTREY AVE.. EVANSTON. IL. 60204 U.S.A.

AREA CODE 3121866-2200 . CABLE: SHUREMICRO

TWX:

910-231-0048 TELEX: 72-4381

OMNIDIRECTIONAL DYNAMIC ANALYZER MICROPHONE

FOR SOUND SYSTEM EQUALIZATION

GENERAL

The Shure Model ES615 Omnidirectional Dynamic Analyzer Microphone is specifically designed for equalization applications in conjunction with devices such as the Shure Model M615 Equalization Analyzer.

ES615 is a probe-configuration microphone, offer-

The ing extremely broad, flat frequency response with a controlled low-frequency sponse is characterized specifically for use in

rolloff characteristic. Its re-

pinknoise-excited octave and one-third octave analyzer systems. When used with the M615 or other equalization analyzers, the

ES615 provides the microphone

characteristics necessary for room or system equaliza-

tion.

ES615 is designed for low-impedance operation

The

(25 to 200 ohms). This is recommended for instrumen-

tation applications where long cable lengths are

required, to avoid excessive high-frequency loss and hum pickup. The

ES615 may be converted to high im-

pedance using a Shure A95 Series Line Matching

Transformer.

ES615 has a satin-chrome steel case and stain-

The

less steel grille. It is equipped with a male three-pin professional connector, and provided with a microphone swivel adapter, and

15m (50 ft) microphone

cable.

Model ES615 Features:

Broad, flat frequency response with controlled lowfrequency rolloff for use in equalization analyzer systems (see Figure 1)

Specified one-third octave pink noise frequency

response envelope (see Figure 2) Omnidirectional polar pattern with controlled

diffuse-field frequency response required for prop-

er equalization

Slender, lightweight probe configuration for mini-

mum sound field disturbance

Rugged

-will withstand years of normal handling

without deviating from original standards

Dependable- no need for special handling often

required for delicate instrumentation microphones

SPECIFICATIONS

Type

Dynamic

Sine-Wave Frequency Response

30 to 20,000 Hz (see Figure 1)

*I0

-10

TYPICAL

FREMNCY IN HERTZ

SINE-WAVE

FIGURE

W'JO

FREQUENCY

RESPONSE

Pink Noise Frequency Response Envelope

Characterized from 30 to 20,000 Hz (one-third octave bandwidth) (see Figure 2)

560

T-

125

FREUENCY IN HERTZ U,OOO

ONE-THIRD

FREQUENCY

FIGURE

OCTAVE

PINK

RESPONSE ENVELOPE

NOISE

Polar Pattern

Omnidirectional, with controlled diffuse-field response (see Figure 3)

1,000

-----

POLAR

FIGURE

HZ.

4.000

Hz.

10,000

HZ.

PATTERN

Impedance

Microphone rating impedance is 38 ohms (50 ohms actual) for connection to microphone inputs rated at 25 to 200 ohms

Output Level

(at 1,000 Hz)

Open Circuit Voltage

(at

dB SPL)

.........

88.0 dB (0.040 mV)

(0 dB = 1 volt per microbar)

Power Level

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

-61.0 dB

(0 dB = 1 milliwatt with 10 microbars)

27A1357

1977,

(QE)

Shure

Brothers

Inc.

Printed

U.S.A.

Hum Sensitivity

35 dB equivalent SPL in a 1 millioersted field

Phasing

Positive pressure on diaphragm produces positive voltage on pin 2 of plug element

Cable

15m (50 ft) two-conductor shielded, detachable with male and female three-pin professional audio connectors.*

Swivel Adapter

Positive action, adjustable through 90" from vertical

to horizontal, permits easy removal for hand-held

use, suitable for. mounting on stand with

%"-27

thread

Operating Temperature Range

-29" to 74°C (-20" to 165°F)

Case

Satin-chrome steel with stainless steel grille

Dimensions

See Figure 4

Correction Frequency

(dB):

(Hz):

5.5

1.5

80 100

125

0.5

160

Compensation is not required for frequencies above 160 Hz; the remainder of the frequency response curve is essentially flat.

FREQUENCY

LOW-FREQUENCY

FIGURE

CORRECTION

CURVE

Certain other specific corrections may be made for

ES615 operation with other analyzers. The White Model

140 Sound Analyzer is factory-calibrated for a micro-

phone with a sensitivity of 0.13

mV/pb. The ES615 is approximately 10 dB less sensitive; therefore, 10 dB should be subtracted from the Model 140 dB SPL

readings.

20.1 rnm OlA.

(

25/32

IN.)

-I

50.8mm

IN.)

-1

OVERALL

DIMENSIONS

FIGURE

152.4mrn

IN.)

Weight

Net: 218 grams (8 oz) Combined Net: Packaged: 984 grams (2 Ib,

Designed to mate with Cannon

(Q.G.)

series or equivalent connector

CART~IDQE

GROUND

764 grams

/COOED TERMINAL

INTERNAL

(1 Ib, 11 oz)

oz)

series, Switchcraft

GREEN ELEMENT

YELLOW SHIELD

C~SE

CONNECTIONS

GROUND

FIGURE 5

USE

WITH OTHER ANALYZERS

The ES615 Analyzer Microphone may be used with virtually any equalization analyzer. It is important to note, however, that compensation must be made for

ES615's controlled low-frequency rolloff. Figure 6

the and the following table indicate the dB correction to

be added to a measured response curve (provision for

this compensation is included in the Shure

M615

Equalization Analyzer).

When using the

ES615 with the Dukane Model 99A600 Audio Spectrum Analyzer, Communications Company Altec (H-P) Model

ARA-412 Acoustic Response Analyzer, or

8050A Real Time Audio Analyzer, it is recommended that a Shure M67 Microphone Mixer or equivalent device be used as a preamplifier between the sensitivity of these units. NOTE: The Altec

ES615 and the analyzer due to the low input

8050A microphone input is at a 130-volt potential for powering a condenser microphone; using this input it is possible

to permanently damage the output to the Altec

8050A direct input through an ap-

ES615. Connect the M67

propriate adapter.

ARCHITECTS' SPECIFICATIONS

The microphone shall be the Shure Model ES615 or

equivalent. The microphone shall be a moving coil (dy-

namic) type with a frequency response of 30 to 20,000

Hz. The microphone response shall be characterized specifically for use in pink-noise-excited analyzer systems. The unit shall have an omnidirectional polar characteristic. The microphone shall have a rated im-

pedance of 38 ohms for connection to microphone inputs rated at 25 to 200 ohms. The microphone output shall be -61.0 dB where

0 dB = 1 milliwatt with

10 microbars.

The microphone shall be provided with a swivel adapter adjustable through zontal and a

15m (50 ft) two-conductor shielded cable

90" from vertical to hori-

equipped with male and female three-pin professional audio connectors designed to mate with Cannon series, Switchcraft A3

(Q.G.)

series, or equivalent con-

nectors. The microphone swivel adapter shall mount on a stand having a

%"-27 thread.

The overall dimensions shall be 203 mm (8 in.) in

length and 20.1 mm

(25/32 in.) in diameter.

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