As mentioned above, timbre variations due to the air absorption mainly affect the high-frequency components.
From a signal processing point of view, timbre variations are reflected in changes in both the time evolution and the spectral distribution of the sound energy.
A classical high-shelving second-order IIR filter was used as described in [21] to model the timbre variations due to the air absorption.
In addition, the factor, applied between the filter gain and the source-to-listener distance, can be changed, so that the effects of timbre variations can be easily adjusted (increased or decreased).
Variations in timbre can interfere with pitch height perception6,52.
From the start, with a muscular lament over the Swiss people's lack of freedom ("How burdensome is life! / We no longer have a fatherland!"), Finley established character through urgent shaping of phrases and minute variations of timbre.
From the start, with a muscular lament over the Swiss people's lack of freedom ("How burdensome is life! / We no longer have a fatherland!"), Finley established character through urgent shaping of phrases and minute variations of timbre.
It presented cornerstones of the classical-guitar repertory, as Michael Newman performed the five moody guitar preludes by Heitor Villa-Lobos, and David Starobin explored 19th-century pieces by Fernando Sor with exquisite variations of timbre and attack.
The richness of life doesn't lie in the loudness and the beat, but in the timbres and the variations that you can discern if you simply pay attention.
From an acoustic point of view, the perceived variations in the pitch, timbre, and loudness of the voice that characterise the vibrato are due to variations in the amplitude and frequency of its harmonics.
