LG HM031M - Page 37

34 _ Air-to-Water Heat Pump
Part 1. Monobloc Unit
11. Noise Criteria
AHBW126A0 [HM121M] AHBW128A0 [HM123M]
AHBW146A0 [HM141M]
AHBW166A0 [HM161M]
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
▲ Cooling
n Heating
AHBW148A0 [HM143M]
AHBW168A0 [HM163M]
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
▲ Cooling
n Heating
▲ Cooling
n Heating
▲ Cooling
n Heating
Approximated SPL at specific distance:
• SPL[dB] = A + 20xLog(B/C)
• Where A[dB] : SPL at 1m distance
B[m] : 1m
C[m] : specific distance