If you’re referring to Austronesian (the language family and cultural group spread across Southeast Asia and the Pacific) and acoustic, it might mean:Traditional Austronesian music and sound – using native instruments such as kulintang, gabbang, nose flutes, drums, and other acoustic instruments made from bamboo, wood, or shells.Oral tradition and spoken sound – the way Austronesian peoples used chanting, storytelling, and song in rituals and daily life.Acoustic study of Austronesian languages – in linguistics, the analysis of the sounds (phonetics) of Austronesian languages using acoustic measurements.