... AnalyzerDB series (DB4, DB8, DB16) type multi-function acoustic meter is designed in line with the ... or continuous connection, that can be used for well logging,loose circle,measuring the pile, ... route shallow earthquak test. Provide variety of methods for various occasions ordinary acoustic wave testing.Host machine ... , 1, 2, 4 Ms;10. Negative latency points (for multi-channel): 2, 4, 8, 16, 32, 64, ...