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LIVELLI DI PRESSIONE SONORA
63
(dB)
MOD.
La
Lb
La
0127
61,5
60,5
63,5
0131
61,0
61,0
63,0
0137
61,5
61,0
63,5
0142
61,5
61,0
63,5
63
(dB)
Lc
Ld
Lc
MOD.
0127
59,0
60,0
62,0
0131
59,0
60,0
62,0
0137
59,0
60,0
62,0
0142
59,0
60,0
63,5
L (a, b, c, d): valori di pressione sonora rilevati in condizioni
di campo libero con fonometro posizionato ad 1 m dall'unità,
1,5 m da terra nei punti in fi gura.
BANDE D'OTTAVA / OCTAVE BANDS (Hz)
125
250
(dB)
(dB)
Lb
La
Lb
La
60,0
55,5
57,0
56,5
60,0
55,5
57,5
57,0
61,0
56,0
58,0
57,5
61,0
56,0
58,0
57,5
BANDE D'OTTAVA / OCTAVE BANDS (Hz)
125
250
(dB)
(dB)
Ld
Lc
Ld
Lc
63,0
53,5
55,0
54,5
63,0
53,5
55,5
54,5
63,5
54,0
56,0
54,5
64,0
54,0
56,0
54,5
Ld
Mod. 0127 - 0131 - 0137 - 0142
HWA-A/FC 0127÷0142
500
1000
(dB)
(dB)
Lb
La
Lb
La
53,5
55,5
52,5
51,5
53,5
56,5
52,5
52,5
54,5
57,0
53,0
53,0
55,0
57,5
53,5
53,0
500
1000
(dB)
(dB)
Ld
Lc
Ld
Lc
56,0
53,5
51,5
50,0
56,0
54,0
51,5
50,0
56,5
54,5
52,0
50,0
57,0
55,0
52,0
50,0
L (a, b, c, d): sound pressure level measured in free fi eld
conditions, at 1 m from the unit, 1,5 m from the fl oor level in
the point on the picture.
La
Lc
29
SOUND PRESSURE LEVELS
2000
4000
(dB)
(dB)
Lb
La
Lb
La
50,0
47,5
46,0
48,0
50,0
48,0
46,0
48,5
51,0
48,5
46,0
49,0
51,0
48,5
46,5
49,0
2000
4000
(dB)
(dB)
Ld
Lc
Ld
Lc
47,5
46,0
47,0
47,0
48,0
46,0
47,5
47,5
48,0
46,5
47,5
48,0
48,0
47,0
48,0
48,0
Lb
TOT.
dB(A)
8000
(dB)
La
Lb
Lb
48,0
59,9
57,9
48,0
60,6
57,9
48,0
61,1
58,6
48,0
61,3
58,9
TOT.
dB(A)
8000
(dB)
Lc
Ld
Ld
48,0
58,1
57,9
48,0
58,3
58,0
48,0
58,6
58,4
48,0
59,0
58,6
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