Theatre Design & Technology - Summer 1986 - 14

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Figure 3: Brightness .. Distance in Meters.

visibility. Even if more illumination is
provided, it seems to have no signifi ..
cant effect with respect to distance.
This seems to suggest that in the ordinary theatre, if we provide more than
about 1,000 lux, it will not improve
visual acuity.
The next experiment was done
March II, 1977 on the large stage at
the National Theatre in Tokyo, with
35 people. The results are shown in
Table 3.
Test Four was conducted July, 1977
at the
ihon University Art Department (Tokyo), with 81 students. The
experiment was set up in a corridor.
The results are shown in Table Four.
SUMMARY
I have put average data for the four
experiments in Table Five, in an attempt to arrive at a general average. We
should keep in mind the uncontrolled
variables affecting the results, such as
environmental conditions, psychological conditions of the subjects, etc. Even
if we should measure with \'ery se\'ere,
strict conditions and get much more
precise data, it doesn't make sense,
finally, to determine rigidly the greatest
allO\\able distance for seating. It should
be enough if we have only achieved a
rough understanding. It would be well
to be judged by the modulated philoso ..
phy which I like to live by: take all such
experimental findings with a grain of
salt.
12

Thratre ()e,ign.1I. TedlllOlog)

USI rT SlIlllll1Cr 19xo

TABLEt
=
A

=

Person
B Sex
C
ABC

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
--44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

M
39
23
M
54
M
M
28
M
M
M
23
M
M
25
M
47
M
48
29
M
M
24
M
24
M
31
M
39
M
M
30
M
30
M
65
M
29
M
28
M
41
M
37
M
53
M
20
M
40
M
30
M
29
M
M
31
M
30
51
M
M
39
M
32
M
31
M
31
M
--:-M:.:--_ _---=2:..::3
----;-M.
----::-:M
24
M
M
41
M
24
M
36
M
31
--M
30
M
30
M
41
M
23
M
M
35
29
M
M
29
M
54
M
25
M
M
22

Average

36

=Age

=

D Distance in Meters
Dat1000lux
Dat500lux

40.120
39.280
32.000
36.760
34.240
27.700
43.480
41.800
29.340
26.060
31.800
28.520
37.600
42.640
44.000
44.000
44.000
44.000
34.240
31.800
30.160
42.640
40.960
38.440
35.080
36.760
34.240
28.520
26.060
43.480
40.960
31.800
23.600
36.760
38.440
30.160
31.800
34.240
31.800
28.520
26.880
39.280
36 760
26.060
24.420
44.000
44.000
21.160
16.360
30.980
26.880
39.280
35.920
29.340
22.780
38.440
41.800
43.480
43.480
43.480
38.440
40.960
37.600
31.800
26.880
40.960
39.280
43.480
43.480
43.480
37.600
38.440
35.080
43.480
43.480
....:3:.:::9....:2:..::8-:;..0
-:;..35;:..:..c:-:92:-::O_
2:-:9:-c.2~4;-;;0c----....:2;:-:8;'-;.5::-::2::::022.780
17.960
30.160
21.960
36.760
39.280
35.080
31.800
30.980
25.240
39.280
36.760
22.780
18.760
34.240
38.440
34.240
28.520
34.240
31.800
30.160
29.340
40.120
36.760
36.760
32.000
40.960
38.440
35.080
30.160
36.760 _ _----=3.:::.:5.'-=-08=..:0'--29.340
24.420
31.800
26.060
38.572

33.021

Table 1: Experiment Data From Gunma Music Center



Table of Contents for the Digital Edition of Theatre Design & Technology - Summer 1986

Contents
Theatre Design & Technology - Summer 1986 - 1
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