Mitsubishi Electric i-MTR2-G02-M0 Data Book page 50

12. EXAMPLES OF CALCULATION OF UNIT DESCRIPTION
THE SOUND EMISSION OF UNITS
UNDER UNIT WITH DUCTING ON INTAKE
UNDER UNIT WITH PLENUM ON DELIVERY
UNDER UNIT WITH PLENUM ON INTAKE
OVER UNIT WITH DUCTING
Canal
ELCAdoc 19/05/2021
Data Book
i-MTR2-G02-M0_0521_EN
Lp A = Design value on front of Under
Lp B = Design value on delivery of Under
Lp C = Design value on intake of Under
Points B and C do not influence point A
Lp A = Design value on front of Under
Lp B = Design value on delivery of Under –
attenuation of plenum
Lp C = Design value on intake of Under
LpA
Lp A+C = 10 log10 (10 +10
10
Point B does not influence point A
Lp A = Design value on front of Under
Lp B = Design value on delivery of Under
Lp C = Design value on intake of Under –
attenuation of plenum
LpA
Lp A+C = 10 log (10 +10
10
10
Point B does not influence point A
Lp A = Design value on intake of Over
Lp B = Design value on delivery of Over
Point B does not influence point A
LpC
)
10
LpC
)
10
50