Table 4.

CPP in [dB] of Birk et al. (2017b), Döllinger et al. (2018), and Thornton et al. (2019).

CPP in [dB]	GC1 closed	GC2 30% partially closed	GC3 60% partially closed	GC4 no contact
Birk et al., 2017b	24.3 ± 5.82	21.8 ± 4.2	16.4 ± 2.82	15.7 ± 1.94
Döllinger et al., 2018	24.0 ± 4.8	22.8 ± 4.8		19.4 ± 4.9
Thornton et al., 2019	17.9 ± 4.3	15.8 ± 6.5		11.0 ± 3.4

Quantitatively, our CPP values are in the range of values reported there.