Theatre Design & Technology - Winter 1981 - 15

ACOUSTICAL CARDIOID
+10

+

5

0

o
-

0

-

V

5

/

-10

V

P3

-20

-25

-

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0

180

150ยท

-30

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-35
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BOUNDS FROM REAR REACH
BOTH 8DEI OF DIAPHRAGM lINUlTANEOUSLY,
CAUStlG A PfE88LflE DFRREHCE OF ZERO

20

50

500

100

lK

5K

10K

20K

An excellent super-cardioid with very uniform off-axis response.

Figure 6

Figure 8
RCA 770 POLYDIRECTIONAL
"."

,.-:

'---.:--" .

ADJUSTABLE
SHUTTER

180
CARDIOID (dashed) and SUPER-CARDIOID (solid)

Figure 7
ing plate in what is known as the boundary pressure zone. (For
those who would like to know more about the technical whys
and wherefores, Crown, the manufacturer of PZM, will gladly
send a stack of literature.)
For our purposes now, let us consider the product of this new
technique. First, the PZM is rarely mounted on a mic stand. It
goes on the floor, or on the ceiling, or on a set wall, or attached
to the piano lid or some other large flat surface. Its pickup
pattern is hemispherical-Dne half of an omni. Most importantly,
it has no off-axis coloration.
The PZM is still too new for us to know all its capabilities and
its shortcomings. We still must develop proper techniques of use
to realize all its advantages. But at this point, three years after its
introduction with over 4,000 units in use around the world, it
appears that we have a major addition to the world of microphones.
USITIlWinler, 1981

'--.J..J---->'"

D tl 1'1
I
I

I
I

OMNI-

I
I

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I

BI-

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CARDIOID

CONCLUSION
We have taken a fast look at how the microphone has
developed over the past seventy years and how design engineers and manufacturers have responded to the demands of the
marketplace to produce an ever-increasing variety of specialpurpose devices. Understanding how the various families of
microphones operate is an important tool to apply in making
basic selections. I have made no effort to discuss techniques of
microphone application; basic instruction in that area can be
gleaned from references listed in the bibliography and, more
importantly, from your own critical listening. (Also see "Using
Microphones in Performance," this issue, p. 15.)0
Theatre Design & Technology

13



Table of Contents for the Digital Edition of Theatre Design & Technology - Winter 1981

Contents
Theatre Design & Technology - Winter 1981 - 1
Theatre Design & Technology - Winter 1981 - 2
Theatre Design & Technology - Winter 1981 - 3
Theatre Design & Technology - Winter 1981 - Contents
Theatre Design & Technology - Winter 1981 - 5
Theatre Design & Technology - Winter 1981 - 6
Theatre Design & Technology - Winter 1981 - 7
Theatre Design & Technology - Winter 1981 - 8
Theatre Design & Technology - Winter 1981 - 9
Theatre Design & Technology - Winter 1981 - 10
Theatre Design & Technology - Winter 1981 - 11
Theatre Design & Technology - Winter 1981 - 12
Theatre Design & Technology - Winter 1981 - 13
Theatre Design & Technology - Winter 1981 - 14
Theatre Design & Technology - Winter 1981 - 15
Theatre Design & Technology - Winter 1981 - 16
Theatre Design & Technology - Winter 1981 - 17
Theatre Design & Technology - Winter 1981 - 18
Theatre Design & Technology - Winter 1981 - 19
Theatre Design & Technology - Winter 1981 - 20
Theatre Design & Technology - Winter 1981 - 21
Theatre Design & Technology - Winter 1981 - 22
Theatre Design & Technology - Winter 1981 - 23
Theatre Design & Technology - Winter 1981 - 24
Theatre Design & Technology - Winter 1981 - 25
Theatre Design & Technology - Winter 1981 - 26
Theatre Design & Technology - Winter 1981 - 27
Theatre Design & Technology - Winter 1981 - 28
Theatre Design & Technology - Winter 1981 - 29
Theatre Design & Technology - Winter 1981 - 30
Theatre Design & Technology - Winter 1981 - 31
Theatre Design & Technology - Winter 1981 - 32
Theatre Design & Technology - Winter 1981 - 33
Theatre Design & Technology - Winter 1981 - 34
Theatre Design & Technology - Winter 1981 - 35
Theatre Design & Technology - Winter 1981 - 36
Theatre Design & Technology - Winter 1981 - 37
Theatre Design & Technology - Winter 1981 - 38
Theatre Design & Technology - Winter 1981 - 39
Theatre Design & Technology - Winter 1981 - 40
Theatre Design & Technology - Winter 1981 - 41
Theatre Design & Technology - Winter 1981 - 42
Theatre Design & Technology - Winter 1981 - 43
Theatre Design & Technology - Winter 1981 - 44
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