Table 7.

Measured sound levels for the aircraft A350-900 (flight 4), total measurement duration 29 m 35 s, entire trip duration 2 h 5 m.

Segment	Duration (s)	$L_{\mathit{eq}}$ [dB(A)]	$L_{\mathit{max}}$ [dB(A)]	$L_{\mathit{eq}}$ [dB(C)]	$L_{\mathit{max}}$ [dB(C)]	Flight stage
1	26.4	70.4	83.7	84.3	88.5	Taxiing
2	32.9	61.6	63.2	83.0	87.2	Taxiing
3	78.6	61.1	65.2	80.7	87.6	Taxiing
4	163.1	74.3	79.8	97.6	106.7	Takeoff
5	293.9	74.8	79.3	88.5	91.1	Cruising
6	126.9	79.4	80.4	91.2	92.4	Cruising
7	47.9	79.3	80.9	89.9	91.0	Cruising
8	192.1	82.3	83.8	91.0	92.4	Cruising
9	57.0	82.5	84.0	90.8	91.6	Cruising
10	15.2	79.9	80.9	90.7	91.3	Cruising
11	39.8	77.8	79.3	90.4	91.6	Cruising
12	64.5	78.0	82.7	87.7	88.9	Cruising
13	50.9	76.0	77.0	88.3	89.1	Cruising
14	18.4	75.9	76.3	86.3	86.7	Cruising
15	70.4	71.3	72.7	84.1	86.7	Cruising
16	146.6	72.4	73.8	89.4	92.2	Cruising
17	143.8	70.5	78.1	82.6	85.9	Cruising
18	86.2	71.5	76.8	87.5	94.4	Landing