Panasonic Urban Multi MX1 Series Manual page 81

PACD011001G2 / PACD011004G3
Classifications of indoor unit environments (reference data)
Table 2
Notes: 1. Excluding bedrooms
2. Reference values of faint noises in the place of usage
8.1.2 Faint Noises and Correcting Operating Noise with Respect to Faint Noises
Faint noises are defined as peripheral sounds existing while the unit is not running, which are picked up
when measuring operating noise. If these faint noises are 10 dB or more than the noise produced by the
unit, the measured value can be taken as the operating noise of the unit. But, the difference must be
corrected if less than 10 dB, because of the effect these noises have on the actual measured value. Also,
when the sound meter remains unchanged even while the unit is stopped, we can determine the
operational noise to be at least 10 dB less than the faint noises, but we cannot pinpoint the operating noise
exactly.
For example, if the faint noises are some 65 dB and the noise produced by the unit in operation is 70 dB,
the indicated difference comes to 5 dB. Using Table 3, we recommend you correct the operating noise by
about 2 dB to 68 dB.
Table 3 Correcting the effect of faint noises
Difference between when noise
is produced and when not
Corrective value
Urban Multi Inverter "MX1" Series
Classification Environment
I Non-active places requiring
silence
II Sedate business activities
that do not disturb people
even over time
III Somewhat quiet settings that
permit soft-spoken
conversation, typical
activities
IV Somewhat loud settings that
permit regular conversation,
brisk activity
V Loud places that permit
conversation in a loud voice,
highly active place with many
people
VI Rather loud settings
Appendix (Check Points in Installing UM Series)
Example
Reception rooms, libraries,
sitting rooms, hospitals
(examining rooms) (Note 1)
Quiet offices, classrooms,
small conference rooms,
lobbies
Small offices, large
conferences rooms, quiet
stores, restaurants
Large offices, typical stores,
cafeterias
Loud large-side offices, large
cafeterias, loud stores
Factories, gymnasiums,
recreational places like
pachinko parlors
1 2 3 4
-6.9 -4.4 -3.0 -2.3
Faint noises
(Note 2)
~ 35
~ 40
~ 45
~ 50
~ 55
~ 60
5 6 7 8
-1.7 -1.25 -0.95 -0.75
Recommended
operating noise
on site
~ 40
~ 45
~ 50
~ 55
~ 60
~ 65
Unit: dB
9 10
-0.60 -0.45
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