Clarifying Activity Students use proportions to find the frequencies of notes in an octave. The A one octave above that has a frequency of 880 Hz. There are 12 half steps from the 440 A to the 880 A . There is a constant ratio between the frequencies of each pair of consecutive notes. A 880 Students use the idea that there is a constant ratio between each pair of consecutive half-steps to find the other frequencies.
Students begin applying the idea of a constant ratio with simpler situations.
Students use this constant of proportionality and technology to compute the frequencies for each note in the table.