Several cases of the explanation of the phenomenon of standing waves in strings, there are few experimental measurement tools when demonstrating this phenomenon in a classroom, it is for this reason that we have implemented different forms to show how we can experimentally demonstrate the wave behavior of string vibration, where variations in the length, frequency and tension of the string have been made, with the purpose of showing this phenomenon more generally and clearly for students. In this work, we present the step-by-step the implementation of two experimental procedures of laboratory concerned with the study of wave strings, seeking as a primary objective to show students the experimental way of obtaining and measuring the number of bellies in a string in addition of being able to calculate both fundamentally and experimentally the fundamental frequency of each string by varying both its length and its tension using the resonance frequency. Finally, we present the respective experimental errors, for each of the assemblies and methods carried out in the laboratory to perform the measurements shown and registered in this work.

8 pages, 6 Tables, 7 Figures