Trane Mitsubishi Electric CITY MULTI Series Technical & Service Manual page 15

3-2. SOUND PRESSURE LEVEL
Note: Measured in anechoic room.
3-3. NC CURVES
TPLFYP006EM140B
External Static Pressure: 0 Pa [0.00 in.WG]
Power Source: 208-230 V 60 Hz
70.0
65.0
60.0
55.0 Approximate minimum
audible limit on
50.0
continuous noise
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
63 125 250 500
Octave band center frequencies (Hz)
OCHT746A
Measurement location
High 60 Hz
Middle 60 Hz
Middle2 60 Hz
Low 60 Hz
NC-60
NC-50
NC-40
NC-30
NC-20
1k 2k 4k 8k
Sound pressure level in anechoic room: Low-Mid2-Mid1-High
TPLFYP006EM140B
TPLFYP008EM140B
TPLFYP012EM140B
TPLFYP015EM140B
TPLFYP018EM141B
TPLFYP024EM140B
TPLFYP030EM140B
TPLFYP036EM140B
TPLFYP048EM140B
TPLFYP008EM140B
TPLFYP012EM140B
External Static Pressure: 0 Pa [0.00 in.WG]
Power Source: 208-230 V 60 Hz
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
Approximate minimum
audible limit on
15.0
continuous noise
10.0
63
15
Sound pressure level dB (A)
19-23-25-27
27-29-30-31
28-29-30-31
28-30-32-34
28-31-33-35
35-37-39-41
36-39-42-45
High 60 Hz
Middle 60 Hz
Middle2 60 Hz
Low 60 Hz
125 250 500 1k 2k 4k
Octave band center frequencies (Hz)
NC-60
NC-50
NC-40
NC-30
NC-20
8k