Echo Depth

Echo Time Is a Round Trip

A pulse return time must be halved before speed becomes depth. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Echo time is a round trip

The measured echo time is 6 s, so the one-way time is 3 s.

6/2=36/2=3
Echo depthA round-trip time is halved before speed turns it into depth.round tripdepth12accepted

Speed times one-way time gives depth

At toy speed 4 m/s, the reflector depth is 12 m.

4⋅3=124\cdot3=12
Echo depthA round-trip time is halved before speed turns it into depth.round tripdepth12accepted