# Active sound power absorbers : their effect on sound transmission through wall openings

> 2000 doctoral thesis by Grant William Emms at University of Auckland

**Wikidata**: [Q111963839](https://www.wikidata.org/wiki/Q111963839)  
**Source**: https://4ort.xyz/entity/active-sound-power-absorbers-their-effect-on-sound-transmission-through-wall-openings