Shure 1968 catalogue microphones

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microphones

For PM Me flddress
€99 T ape Recording

SHURE BROTHERS, INC., 222 HARTREY AVE., EVANSTON, ILLINOIS 60204 USA.
TELEPHONE: AREA CODE 312, DA 8-9000

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Selecting the Correct: SHUHE

itiEP'l Pumtur PATTERNS

UNtDtRECTIONAL /

\ (micmphone)

I \.
\
\\
{micropnunm \
OMNIDIRECTlONAL l
. .
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WHAT IT IS

These microphones pick up sOuncl main y
from the front, while suppressing sOund
and noise coming from the back. The most
generally useful unidirectional pick-up
pattern is the CARDIOID (meaning heart-
snaped"). This pattern will suppress rear
sounds at least 7092; while picking up from
sound over a broad area. Sounds l20" to
lBO" off-axis are almost entirely suppressed.

in addition to the Cardioids (the Unidyne
lV, Unldyne lll, Unidyne ll, Unidyne A,
Unidyne B and the Unisphere Series of
unidirectional microphones) other Share

unidirectional micrOphones are described
as Super-Cardioid (Model 330)

lhese mic'opnores picr. up sour-d more or
less evenly from all directions. In effect
they are nondirectional. They can be hand-
held, stand-mounted, or worn around the
neck. This type includes the greatest num-
ber of rnicrOphones, together with the wid~
est pr'ce range and response characteristics

BIDIRECTIONAL

(micmphone)

STEP fl
FREQUENCY RESPONSE

The fidelity of reproduction afforded by
the microphone depends on three factors
of the frequency response;

l. Response Range. In general, the more
extended the frequency response of

Use

Response Range

Recording, broadcastIng, highest quality
public address for music and voice

High quality public address for voice and
music

$045,000 Hz Flat

70-10000 Hz

Pick up sound from front and back while
suppress'ng soimd from sides. top and
bottom.

the microphone is, the more faithtu
the reproduction will be.

2. Smoothness. A high fidelity microphone
is made so that no conspicuous abrupt
peaks or valleys of output occur at any
frequency. This results in an essentially
smooth frequency response curve.

3. llatness. A flat frequency response
curve is one showing output remain-
ing at approximately the same level
throughout the frequenCy range. This
means that the micrOphone responds

RESPONSE REQUIREMENTS

Response Character

Smooth

{at or siightiy rising
No prominent peaks

indoor paging systems and public-address
systems for voice use

Outdoor paging systems or systems in
noisy locations. For Voice use when
moximum intelligibility reouired.

2 a", 1968 Shure Brothers, Inc.

200-5000 Hz

BOO-3,500 Hz

Slightly r'sing
No prominent peaks

Rising
A peak in the 2000 to
3500 Hz region is often
desirable

iVIicmphone for

WHERE TO USE H"

The most commonly applied solution to
feedback problems. Greatly simplifies plan-
ning of SOund installations. With the rear
of the micrOphone rejecting sound, the
microphone can be placed so that sound
projec'ir-g from the loudspeaker cannot
re-enter the microphone to generate feed.
back Performers can work much further
away from unidirectional microphones than
Wift omnid'rectional microphones.

Effectively suppresses audience noises,
COugltir-ig, shuffling feet, etc. ideal for fixed
installation before an individual performer
or a small group. Pickup of large groups
can be effected with multiple microphone
installation.

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Good 'or general nppl rations. where teedbocr.
or riucnenre "Oisc is no great problem. Fw-
rentely versohe. Proctudlly (t'l chm-Sum
"probe type r'i'crophones ore omnicfnectzoriol

Willi '(ilCdtlCl orci

owls they are meal for
interview Siluri OM». li-.'O?e: Shur'e also makes
{See TWICIL 4i

UmdireC"C'ol ' inches

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Ideally suited for use when two perform-
ers, or groups, are on opposite sides of
microphone. Allow$ the same freedom of
movement as unidirectional microphones,
while solvng dithult feedback problems
such as rooms with hard" ceilings Or
where loudspeakers are mounted over or
to the side of the micrOphone.

equally well at any frequency, an es
sential of high fidelity reproduction.

While the microphone with the widest
range, smoothest and flattest frequency
response curve will give the highest fidel
ity, it is not necessarily the best micro-
phone for every application. [For example,
a shaped (peaked) response is often de-
vised to achieve added presence" for
microphones used in paging and communi~
cations systems] Frequency response re-
quired for various applications is sum-
marized below:

Possible Microphones

R bbon
Dynannc

Ribbon
DyridmlC
Some crystals or ceramics

above plus
Some Controlied
Magnetics

Controlled Magnetic
Dynamic

Carbon

Some Ceramics