Table 2.

Summary of signal parameter measurements for beluga and narwhal echolocation for all 81 acoustic events (beluga: n = 19; narwhal: n = 62). Mean ± standard deviation (s.d.) and range (min–max) are provided.

Variable	Unit	Beluga		Narwhal
		Mean ± s.d.	Range	Mean ± s.d.	Range
peak	kHz	68.7 ± 10.1	54.4–96.7	43.7 ± 7.8	28.0–58.8
peak2	kHz	67.6 ± 7.9	50.9–89.5	49.3 ± 6.8	34.9–63.3
peak3	kHz	65.5 ± 10.7	43.0–86.4	46.1 ± 8.1	17.3–65.2
trough	kHz	68.7 ± 8.9	51.3–90.4	48.2 ± 6.5	32.1–64.3
trough2	kHz	63.8 ± 9.4	42.4–77.4	44.2 ± 9.5	16.8–65.1
peakToPeak2	kHz	16.6 ± 2.4	13.3–24.0	19.4 ± 2.8	11.0–25.1
peakToPeak3	kHz	16.4 ± 2.4	11.6–22.2	15.3 ± 2.6	5.8–21.2
peak2ToPeak3	kHz	23.5 ± 3.1	17.2–31.4	19.4 ± 4.8	6.2–31.8
Q_10dB	kHz	6.1 ± 4.7	1.7–16.0	3.3 ± 1.4	1.3–10.6
Q_3dB	kHz	33.3 ± 24.7	8.8–93.6	15.0 ± 5.6	6.0–34.8
fmin_10dB	kHz	53.1 ± 8.1	42.4–71.7	33.1 ± 5.5	22.2–51.3
fmin_3dB	kHz	65.0 ± 9.7	50.1–88.1	40.5 ± 6.6	26.3–57.0
fmax_10dB	kHz	87.4 ± 15.2	61.7–119.0	59.3 ± 13.8	33.9–90.0
fmax_3dB	kHz	74.2 ± 12.4	54.3–103.3	47.1 ± 9.3	29.6–66.6
BW_10dB	kHz	34.3 ± 15.9	9.3–65.5	26.2 ± 12.1	10.4–58.8
BW_3dB	kHz	9.2 ± 6.9	0.9–25.3	6.5 ± 3.9	1.9–17.8
centerHz_10dB	kHz	70.2 ± 9.2	53.1–93.6	46.2 ± 8.5	28.1–65.5
centerHz_3dB	kHz	69.6 ± 10.6	52.2–95.7	43.8 ± 7.8	28.1–58.9
duration	µs	659.7 ± 479.9	53.4–1487.0	592.9 ± 488.0	15.0–1667.1
ici	ms	177.9 ± 174.6	2.9–696.5	143.5 ± 70.1	20.3–334.2