3 ms·

No, octave resonates in two different places. If we talk about octave as of sum of two sines.

• hoseja 4y ago
  I was sloppy. First i meant the octave as two separate tones (one after another), then I meant only the higher pitched one. The higher tone also excites the sensors for the lower tone. Wait, does it? I might be spouting bullshit, sorry.
  • ordu 4y ago
    > Wait, does it? Thinking about it, I'm not so sure it doesn't. I'm not a physicist to know it for sure.
    • crubier 4y ago
      It depends on what type of oscillator we are talking about, but strings, chambers or beam oscillators for example will resonate at double frequency of their main frequency. The octave rule definitely has some physical/biological founding, it’s not purely cultural. Although culture also plays a role in its preponderance.
  • hwc 4y ago
    Every note is a sum of harmonic sine waves, usually not just a single one. The first harmonic of 440hz is 880Hz. So plucking a harp string for A4 will also produce the A5 and A6...