Fault Detection of In-Service Bridge Expansion Joint Based on Voiceprint Recognition

Table 3

Main configurations of the devices.

Device	Parameter	Unit	Value
Microphone	Size	mm	18.4
	Sampling rate	Hz	32,000
	Bit depth	bit	16
	Data format	—	WAV
Camera	Size	mm	169.9
	Image size	px
	Image resolution	px	2,073,600
	Frame per second	—	25
	Data format	—	MP4