but for instruments there is a problem
the excitation frequency (frequencies of excitation partials)
must somehow match the resonances of the instrument
this may be OK for the voice, where the resonances of
the vocal tract are broad and the singer can choose
the excitation frequency (vocal cord frequency)
examples: if horn player wants to play C4 =262 Hz how
does he make exactly 262 puffs per second??
Answer: if the lip frequency is NEAR the correct frequency,
FEEDBACK locks the lip frequency to the instrument frequency,
i.e. the wave reflected from end of horn closes lips at right time
| Previous slide | Next slide | Back to first slide | View graphic version |