Speaking rate and vowel duration are generally thought to affect the dynamic structure of vowel formant tracks. This idea was tested by letting a single professional speaker read a long text at two different speaking rates, fast and normal. The extent to which the shape of the first and second formant tracks of 8 Dutch vowels varied under the two different speaking rate conditions was investiga...

Keywords: Trigonometric functions Hurwitz zeta function Legendre chi function Lerch zeta function Bernoulli polynomials Euler polynomials a b s t r a c t In this sequel to our recent note [D. Cvijović, Values of the derivatives of the cotangent at rational multiples of π, Appl. Math. Lett. it is shown, in a unified manner, by making use of some basic properties of certain special functions, suc...