Sound, voice, speech sounds
Phono- comes from Greek "phone" (sound, voice) and appears in linguistic and technological vocabulary. Phonetics = the study of speech sounds; phoneme = the smallest unit of sound; phonics = a sound-based reading method; phonograph = a device that records and reproduces sound; phonology = the study of a language's sound system. Spanish equivalent "fono-": fonética, fonema, fonología, fonógrafo.