Study on Sound Propagation Performance of Mechanized Coal Gangue-Fine Sand Filling Body

Table 5

Main parameters and indicators adopted in the test.

Item	Sampling length (K)	Trigger way	Attenuation multiplier	Sampling frequency	Transmit power (µs)	Low cutoff frequency	High cutoff frequency
Value	1	Microcomputer trigger	1.00	1 MHz	5	100 Hz	1 MHz