Author: Dibbs
Date: 2018-09-24 15:14
Matt74 wrote:
> It makes sense to me that one or more of the overtones might be
> out of tune, in spite of the the heard note being in tune.
> Instruments are imperfect and the vibrations they produce are
> imperfect.
> ...
It might make sense to you but it isn't true. The overtones are perfectly in tune. Plucked or hammered strings have this issue, not woodwinds, brass, or bowed strings.
>
> The reflected sound, as in a cathedral, is different than the
> original sound, because the tones are modified by the
> environment. The pitches also might be modified. For example
> the the pitches you hear may may be taking different routes and
> traveling different distances, and this may have an effect on
> the pitch you hear...
The pitch (frequency) will not change unless the sound source, you, or the walls are moving and causing a doppler effect. Different routes will only cause a phase shift not a change in frequency. There will be a change in timbre too, due to selective absorption of specific frequency bands by different surfaces. It is possible that you could perceive the pitch to have changed but that's not a physical effect, it's in your brain.
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