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sound measurement
tech.	测声 (工作); 声波测距 (法)
sound measurementmeasuring
auto.	声音测量; 测声
sound measurement Because of the large variations in sound magnitudes, and because the human hearing sensation seems to vary in a logarithmic way, logarithms are used in measurement of sound. The sound pressure level is given in decibels (dB)
environ.	声音测量 (由于声音的变化幅度大，且人耳的感觉似乎是以对数的方式改变,对数被用来测量声音，声压大小以分贝的方式给出。)

sound measurement : 13 phrases in 4 subjects

Ecology	1
Rail transport	1
Space	1
Technology	10