| 单词 | reference level |
| 释义 | reference level [`ref·rǝns ´lev·ǝl] ENGINEERING See <<datum plane>> ENGINEERING ACOUSTICS The level used as a basis of comparison when designating the level of an audio- frequency signal in decibels or volume units. Also known as reference signal level. OCEANOGRAPHY 1. Level of no motion. 2. A level for which current is known; allows determination of absolute current from relative current. |
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