Sound pressure level within the region significantly less than the other regions.
这个区域内的声压级明显的低于其他区域.
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Measurement of sound pressure level for sound signal appliances by seagoing vessel
GB/T12303-1990海船声号器具的声压级测量
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解调策略的优点是能将全局声学指标降到最低,但在实际应用中噪声信号的采集和反馈控制代价过高。
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