# Theoretical characterization and modal directivity investigation of the interaction noise for a small contra-rotating fan

> Research article (Mechanical Systems and Signal Processing, 2019) · cited 16× · AI/ML

**Wikidata**: [openalex:W2975630220](https://www.wikidata.org/wiki/openalex:W2975630220)  
**Source**: https://4ort.xyz/entity/theoretical-characterization-and-modal-directivity-investigation-of-the-interaction-noise-for-a-small-contra-rotating-fa