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| Chinese National Standard Category: Air intake/exhaust system |
| English Title: | Reciprocating internal combustion engines—Measurement of sound power levels using sound pressure—Part 4:Survey method using a reference sound source |
| Chinese Title: | 往复式内燃机 声压法声功率级的测定 第4部分：使用标准声源简易法 |
| Standard No.: | GB/T 1859.4-2017 |
| Category No.: | J93 |
| Issued by: | MOHURD; AQSIQ |
| Issued on: | 2017-05-12 |
| Implemented on: | 2017-12-1 |
| Status: | to be superseded |
| Superseded by: | GB/T 1859.4-2025 Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 4: Survey method for use in situ |
| Superseded on: | 2026-2-1 |
| Abolished on: | |
| Superseding: | |
| Word Count: | 10500 words |
| Similar Standards: | GB/T 1859.4-2025 ZB J 93001-1987 GB/T 6809.2-1988 GB/T 23337-2023 GB/T 41161-2022 GB 4759-1984 JB/T 6728.1-2008 GB 2784-1981 GB/T 4759-2009 JB/T 10737-2007 JB/T 11880.2-2014 GB/T 23337-2009 JB/T 6004-2007 JB/T 12083-2014 JB/T 11880.7-2014 JB/T 11788.1-2014 JB/T 9769.1-2010 JB/ 5141-1991 JB/T 9755-1999 JB/T 6012.4-2008 |
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