15
6 - sound levels
•
lpa
Overall A-weighted sound pressure measured at 10 metres from the ground with directivity factor equal to 2.
•
lw
Sound pressure level per octave band, not weighted.
•
lwa
Overall A-weighted sound pressure level.
model
lw
lw a
lp a
125 hz
250 hz
500 hz
1,000 hz
2,000 hz
4,000 hz
8,000 hz
overall
overall
db
db
db
db
db
db
db
db (a)
db (a)
chGF 20
76.6
70.3
69.7
65.6
58.4
53.4
49.6
71
43
chGF 24
77.5
71.1
70.5
66.5
59.2
54.2
50.5
72
44
chGF 28
78.4
72.1
71.5
67.4
60.2
55.2
51.5
73
45
chGF 32
78.4
72.1
71.5
67.4
60.2
55.2
51.5
73
45
chGF 40
80.4
74
73.4
69.4
62.1
57.2
53.4
75
47
chGF 55
79.7
83.5
77.5
76.9
70
63.7
62.2
81
53
chGF 70
79.7
83.5
77.5
76.9
70
63.7
62.2
81
53
chGF 76
79.7
83.5
77.5
76.9
70
63.7
62.2
81
53
PhrF 23
76.6
70.3
69.7
65.6
58.4
53.4
49.6
71
43
PhrF 27
77.5
71.1
70.5
66.5
59.2
54.2
50.5
72
44
PhrF 32
78.4
72.1
71.5
67.4
60.2
55.2
51.5
73
45
PhrF 40
78.8
72.4
71.8
67.8
60.5
55.6
51.8
73
45
PhrF 46
80.4
74
73.4
69.4
62.1
57.2
53.4
75
47
PhrF 60
79.7
83.5
77.5
76.9
70
63.7
62.2
81
53
PhrF 77
79.7
83.5
77.5
76.9
70
63.7
62.2
81
53
PhrF 85
79.7
83.5
77.5
76.9
70
63.7
62.2
81
53
