Corrigendum: Time-of-light measurement of the speed of sound in a metal bar (2016 Phys. Educ . 51 034003 [http://https://doi.org/10.1088/0031-9120/51/3/034003] )

We point out three errors present in the circuit diagram in figure 1, as well as a further
typographical error. The corrections to these errors do not have any impact on the overall
conclusions of the paper.