Noise Criterion Curves; Sound Levels - Mitsubishi Electric Mr.Slim PKA Series Service Manual

5

NOISE CRITERION CURVES

5-1. SOUND LEVELS

Main unit
Measurement location
* Measured in anechoic room.
5-2. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250
BAND CENTER FREQUENCIES, Hz
OCH758
Wall
1.0m
500 1000 2000 4000
Sound level at anechoic room : Low-Middle2-Middle1-High
Model
PKA-M35/50LA(L)
FAN LINE
High
Medium 1
Medium 2
Low
8000
10
Sound level dB (A)
34 - 37- 40 - 43