A great volume of collected chapters - worth exploring if you have time.
William J. Hardcastle, John Laver, Fiona E. Gibbon (editors) “The handbook of phonetic sciences” in the series Blackwell handbooks in linguistics, 2010, Wiley-Blackwell, Chichester (England), Second edition,, ISBN 1405145900, 9781405145909
Handbook of phonetic sciences - Ch 20 - Intro to Signal Processing for Speech
Written for a non-technical audience, this gently introduces some key concepts in speech signal processing.
