# Experimental evaluation on acoustic impedance and sound absorption performances of porous foams with additives with Helmholtz number

> Research article (Aerospace Science and Technology, 2021) · cited 48× · AI/ML

**Wikidata**: [openalex:W3198927530](https://www.wikidata.org/wiki/openalex:W3198927530)  
**Source**: https://4ort.xyz/entity/experimental-evaluation-on-acoustic-impedance-and-sound-absorption-performances-of-porous-foams-with-additives-with-helm