IEC 61672-1: Electroacoustics — Sound level meters — Part 1: Specifications
Electroacoustics — Sound level meters — Part 1: Specifications
Specifies the performance requirements for three types of sound measuring instruments: conventional sound level meters, integrating-averaging sound level meters, and integrating sound level meters.
Key Clauses
| Clause | Title | Summary |
|---|---|---|
| 5.4 | Frequency weighting | A, C, and Z frequency weighting networks with tolerance limits. |
| 5.5 | Time weighting | Fast (125ms), Slow (1s), and Impulse time constants. |
| 5.6 | Level linearity | Linearity range and tolerance for Class 1 and Class 2 instruments. |
| 6.2 | Reference direction | Microphone orientation and free-field correction. |
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