# mains hum

> electric or electromagnetic acoustic phenomenon

**Wikidata**: [Q1231632](https://www.wikidata.org/wiki/Q1231632)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mains_hum)  
**Source**: https://4ort.xyz/entity/mains-hum


## References

1. Freebase Data Dumps. 2013