Table 13.

Measured sound levels for the aircraft B787-900 (flight 4), total measurement duration 48 m 23 s, entire trip duration 3 h 17 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	69.3	65.0	67.6	85.4	89.6	Taxiing
2	76.9	64.9	67.9	86.2	91.1	Taxiing
3	172.4	74.0	80.2	93.4	101.3	Takeoff
4	156.4	69.3	70.9	85.0	86.4	Cruising
5	184.6	74.9	76.4	88.2	90.2	Cruising
6	147.3	76.1	79.2	89.1	90.1	Cruising
7	81.4	74.8	75.4	87.8	89.0	Cruising
8	291.6	72.6	76.3	86.5	90.1	Cruising
9	178.7	71.8	72.7	85.5	86.5	Cruising
10	109.8	71.5	72.1	85.5	86.4	Cruising
11	165.5	71.7	73.0	85.2	86.2	Cruising
12	55.2	71.7	73.2	85.2	86.3	Cruising
13	108.7	72.6	75.9	85.2	86.6	Cruising
14	68.0	72.0	73.0	85.2	86.0	Cruising
15	72.6	72.4	73.0	86.0	87.0	Cruising
16	104.4	73.1	74.1	86.2	87.6	Cruising
17	37.7	70.2	71.1	84.2	85.1	Cruising
18	56.1	68.3	69.7	82.7	83.7	Cruising
19	2.8	68.7	69.2	81.3	81.8	Cruising
20	183.2	67.6	70.4	82.3	84.3	Cruising
21	200.6	67.6	69.6	82.0	84.2	Cruising
22	243.5	72.7	81.5	88.4	98.9	Cruising
23	81.9	71.1	74.7	86.3	87.7	Landing