12. A particular note played on a trumpet has a frequency of 440 Hz. What is the frequency of the note that is one octave higher? 12 . 13. A note has a frequency of 336 Hz and produces a beat frequency of 2 beats with another sound source. What are the wavelengths of the two frequencies that could cause this occurrence if the sounds are produced at 20 C? Of s:00.Vcoding 13. 14. What is the oscillation of wave amplitude heard when two frequencies are nearly identical? 14. For the statement below, write true or rewrite the italicized part to make the statement true. 15. Dissonance is a combination of pitches that produces an unpleasant sound