| 标准 | IEC651 Type2, ANSI S1.4 Type2 | IEC651 Type2, ANSI S1.4 Type2 | IEC651 Type2, ANSI S1.4 Type2 | GB/T3785 IEC651 Type2, ANSI S1.4 Type2 | GB/T3785 IEC651 Type2, ANSI S1.4 Type2 | IEC651 Type2, ANSI S1.4 Type2 | IEC651 Type2, ANSI S1.4 Type2 | IEC651 Type2, ANSI S1.4 Type2 | 
| 测量范围 | 30-130dB | A:C:35-130dB 线性:35-130的dB | 35-130dB | 30-130dB | A:C:35-130dB 线性:35-130的dB | 30-130dB | A:C:35-130dB 线性:35-130的dB | 40-130dB |