背景噪音电平 back ground noise level
背景音乐电平 BGM Volume
背景噪声电平 background-noise level
背景杂波[噪声]电平 background noise level
背景底色电平调节 BGL
讨论了监测待测物使用工况的必要性，给出了电流参量测试仪的传导骚扰和骚扰功率的背景骚扰电平。
The background noise level of this instrument under the condition of conducted disturbance and disturbance power test is provided.
噪声门可将要求的音频信号在强度低于所选电平时无声以提供背景噪声控制。
The noise gate is used to mute an audio signal once it falls beneath a set level for controlling background noise.
控制单元将各子区域背景声音信号电平与各对应设置的子区域报警阈值电平比较，在某子区域背景声音信号电平大于该子区域所设置的报警阈值电平时控制告警。
Modulator mixes point sound signal output by its subordinate multiple detectors to background sound in the sub area and sends it to control unit to realize background sound reproduction.
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