Principle

The frequency ratio of two tones is called an interval. These
intervals have special names in music. As a result, the experiment
can be more easily understood by students, if the terms are known
from music class, at any case (at the very least) they should know
the C-major scale.

With a tensed string the string lengths behave opposite to the
tone pitches (frequencies) of the notes produced. As a result, the
interval of notes can be determined from the ratio of the string
lengths.




In the experiment a monochord is used, which is a resonator with
two tense strings, whose pitch can be changed through "bridges"
placed under them. Both strings are at first tightened so that the
same note is created, a bridge is placed under one string, in order
to adjust the desired interval between the two strings, and the
corresponding string length is measured.

Benefits


Simple and clear setup

Achievement of an elemental learning objective with little
effort