Andalusian whistling

Whistling system used by the Spanish people of Topares, Andalusia in Spain, described by Asencio-Cañadas and Morales-Jiménez (1992) and Meyer (2015). The language is not tonal, and the whistled pitches reproduce aspects of vowel quality rather than intonation. Whistling involves the use of a pita "whistle" or boca "mouth

a clay implement held in the mouth that functions as an "artificial whistling palate" while articulating in Spanish (Meyer 2015