Table 7 Standard level of floor impact sound insulation (unit: dB).

1

\( L^{\prime}_{n, AW} \) ≤ 43

\( L^{\prime}_{{i, F_{max},\; AW}} \) ≤ 40

2

43 \( < L^{\prime}_{n, AW} \) ≤ 48

40 < \( L^{\prime}_{{i, F_{max}, \;AW}} \) ≤ 43

3

48 \( < L^{\prime}_{n, AW} \) ≤ 53

43 < \( L^{\prime}_{{i, F_{max},\; AW}} \) ≤ 47

4

\( 53 < L^{\prime}_{n, AW} \) ≤ 58

47 < \( L^{\prime}_{{i, F_{max},\; AW}} \) ≤ 50