Research on Sound Source Material Recognition Technology in Indoor Geotechnical Inspection

Table 2

Soil sample hammering schedule.

Soil sample	Plan hammering force (N)	Measured hammering force (N)	Number of hammers	Acoustic signal sample number	Sampling frequency (Hz)
T1	35, 45, 55, 65, 75, and 85; A total of six levels	32~58	40-50 times per soil sample	1~56	51200
T2		19~64		57~104
T3		23~78		105~153
T4		38~84		154~204
T5		48~90		205~247
T6		35~94		248~295
T7		30~128		296~338
T8		41~153		339~377
T9		55~196		378~434