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Based on the 1550 nm all-fiber pulsed laser Doppler vibrometer (LDV) system independently developed by our laboratory,empirical mode decomposition (EMD) and optimally modified Log-spectral amplitude estimator (OM-LSA)algorithms are associated to separate the speech micro-vibration from the target macro motion.This combined algorithm compensates for the weakness of the EMD algorithm in denoising and the inability of the OM-LSA algorithm on signal separation,achieving separation and simultaneous acquisition of the macro motion and speech micro-vibration of a target.The experimental results indicate that using this combined algorithm,the LDV system can functionally operate within 30 m and gain a 4.21 dB promotion in the signal-to-noise ratio (SNR) relative to a traditional OM-LSA algorithm.