E線とA線Fisが共鳴するなんてことを言っている人はいないという理解は、間違っている
http://www.jaymaron.com/sound/sound.html
Note Interval Frequency Result
A Unison 1.000 Strongly resonant
Bb Minor second 1.059 Dissonant
B Major second 9/8 Resonance barely noticeable
F Minor third 6/5 Weakly resonant
F# Major third 5/4 Weakly resonant
D Fourth 4/3 Strongly resonant
Eb Tritone 1.414 Dissonant
E Fifth 3/2 Strongly resonant
F Minor sixth 1.587 Dissonant
F# Major sixth 5/3 Weakly resonant
G Minor seventh 1.587 Dissonant
Ab Major seventh 1.888 Dissonant
A Octtave 2 Strongly resonant
どうにか響く、と書いてある