TM 5-805-4/AFJMAN 32-1090
of People to Feelable Vibration.
Figure 2-3. Approximate Sensitivity and Response
of acceleration level of a large surface. These
tion, mechanical equipment selection and isola-
NC-equivalent curves show the vibration accelera-
tion, and vibration isolation for the sensitive
tion levels of a large vibrating surface (such as a
equipment are required.
wall, floor, or ceiling of a room> that will produce
d. Vibration criteria for sound control. Vibrating
radiated sound having approximately the octave
building components will produce sound radiation
band sound pressure levels of the NC curves
which may be unacceptable. Figure 2-6 shows
(shown earlier in figure 2-1).
"NC-equivalent" sound level curves as a function
2-6
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