The speech articulation is affected by the articulation loss of consonants which is impacted by the acousticratio of direct and reverberation sound.
直达声与混响声能比影响辅音清晰度损失率，从而影响语言清晰度。
2
A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels.
In order to analyze the theoretical model for relative acoustic-to-seismic coupling ratio method to detect land-mine, an experimental system for acoustic landmines detection was developed.