Insulation values were measured in accordance with the EN ISO 140 – 3 standard.

Frequency (Hz) Insulation values dB
41 47 53 56
63 15dB 17dB 18dB 34dB
125 22dB 25dB 34dB 43dB
250 36dB 38dB 42dB 47dB
500 44dB 44dB 51dB 50dB
1000 41dB 48dB 55dB 56dB
2000 42dB 51dB 56dB 55dB
4000 46dB 56dB 61dB 55dB
8000 49dB 61dB 64dB