can t reach the surface. it s 4400 meters at that point. depth of water. so they can t physically hear that signal from the surface. number three, we don t know what equipment the chinese is using. they say 37.5 kilohertz. but that s it could be a wide band frequency, it could be anywhere between 40 and 70 frequency kilohertz. so there are a lot of questions that have to be answered. i would discount that. so, art, let s play some sound now of what this pulse or the pinger would sound like. you were tacki intalking about single pulse is unusual, sounds like the wrong signal. here s an example of, i guess, what the correct signal would be, what the sound would be from that pinger. it s just a click. yeah. you got it. all right. so that s what it should sound like. we don t know if that s what the