Technibel GRV250R5TAA Technical Data & Service Manual page 78

1-8 Noise Criterion Curves
4-Way Air Discharge Semi-concealed Type
MODEL : CAV250R5TAA
SOUND LEVEL : HIGH 37 dB(A), NC 30
CONDITION : Center, Under the unit 1.5 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
60
50
40
30
APPROXIMATE
THRESHOLD OF
20
HEARING FOR
CONTINUOUS
NOISE
10
63 125
1
BAND CENTER FREQUENCIES, Hz
REMARKS: 1. Value obtained in the actual place where the unit is installed may be slightly higher than the values
1 2
shown in this graph because of the conditions of operation, the structure of the building, the background
noise and other factors.
2. The test results were obtained from an anechoic room.
NOTE
To evaluate "Noise level" the maximum number of the measured OCTAVE BAND SOUND PRESSURE LEVEL is used.
Read the number on each BAND CENTER FREQUENCIES (horizontal axis) ranging from 63 Hz to 8000 Hz and select
the maximum value (vertical axis) among them.
3
4
5
LOW 31 dB(A), NC 22
250 500 1000 2000 4000 8000
MODEL
SOUND LEVEL : HIGH 43 dB(A), NC 36
CONDITION
SOURCE
60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
THRESHOLD OF
20
NC-20
HEARING FOR
CONTINUOUS
NOISE
10
63
0274_X_I
I - 90
1. Specifications
: CAV360R5TAA-CAV480R5TAA
LOW 36 dB(A), NC 24
: Center, Under the unit 1.5 m
: 220 - 230 - 240 V, 1 Phase, 50 Hz
125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NC-50
NC-40
NC-30
NC-20
0275_X_I