ESTIMATION OF SOUND ABSORPTION COEFFICIENT AT MODAL FREQUENCIES USING DECAY TIME MEASUREMENTS AND EIGENVALUE MODEL IN A SMALL ROOM

Estimation of sound absorption coefficient at modal frequencies using decay time measurements and eigenvalue model in a small room

Measuring the sound absorption coefficient in a small reverberation room below the Schroeder frequency is a challenging task and the results are subject to a high degree of uncertainty.Recent research shows that the low-frequency acoustic properties of the enclosure and the test sample should be characterized by quantities that describe the modal s

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A calculation method for the efficiency of hydrocarbon expulsion based on parameter-diagram of source rock pyrolysis

The efficiency of hydrocarbon rumchata proof expulsion acts as a key geological factor for the study of hydrocarbon expulsion of conventional oil and gas, also, it indicates the enrichment degree of unconventional oil and/or gas.Based on the method of recovering the original hydrocarbon generation potential, a method according to pyrolysis chart wa

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