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 FIGURES (Continued)
Page
25
1/3-Octave Band Spectrum of the Interior Noise in the Miramar II
Hush-House at Standard Microphone Position No. 3 .............
57
26
Split of Sound Power Between Enclosure (Burner Room) and
Augmenter(Exhaust Room) Measured by Reference 3 Utilizing A
1/15-Scale Model:X+N, = 10.5 in., 3300 deg. R, [lambda] = 2 m,
D+A, = 12.5 in., LA= 72 in. ..................................
58
27
Effect of Axial Distance XN on the Sound Power Radiated into the
Enclosure: 72-in. BBN Augmenter, T+T+N,,= 3300 deg. R
[lambda]+N, = 2 ..............................................
59
28
Principal Paths of Noise Radiated from a Hush-House ............
64
29
Source-Receiver Paths for Exterior Noise in a Hush-House
or Jet Engine Test Cell ......................................
65
30
1/3-Octave Bank Spectrum of the Far-Field Noise at
250 ft: Miramar II Hush-House ................................
66
Effect of Axial Distance, X+N,, on the Sound Power Radiated into
31
the Augmenter; 3300 deg. R, [lambda]+N, = 2, D+A, = 12.5 in.,
L+A, = 72 in. ................................................
67
32
Power Based Insertion Loss, PWL FOR 12-inch
Section of Augmenter with BBN Linet at Various
Positions in the 60-in. Hard-Walled Augmenter with 45 deg.
Ramp: F-14 Position, T+T+N,, = 3300 deg. R, [lambda]+N, = 2,
X+N, = 4 in. .................................................
68
BIBLIOGRAPHY ............................................................. 69
REFERENCES ............................................................... 70
vii
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