Hundreds of people took to Next Door and Facebook last night and even as late at 8:00 AM this morning to complain about an incessant bass tone beat that kept them up all night. Complaints came in from all over Richmond, San Pablo and El Sobrante. People were so upset that many were driving around in the early hours of the morning seeking the source. There was much speculation, none of which has panned out.

• There was an event at the Craneway (https://fluffycloudexperience.com/san-francisco/), but the sound continued after 2:00 AM when the event ended.
• Some speculated it came from racing at Sears Point, but that event ended even earlier.
• People driving around with boom boxes.
• Could it be the Golden Gate Bridge? (https://www.youtube.com/watch?v=WTTUluvvpls)

Figure 1 - The Hum - a worldwide mystery sound

This seems to happen other places:

• https://diy.stackexchange.com/questions/33064/anyone-have-an-idea-about-unidentified-constant-noise-vibration-in-single-family
• https://www.theguardian.com/books/2021/jul/07/the-hum-mystery-noise-says-a-lot-about-modern-life
• https://www.kalw.org/news/2021-11-01/the-hum-a-worldwide-mystery-sound-explained
• http://www.sandv.com/downloads/1702bomm.pdf
• https://pubmed.ncbi.nlm.nih.gov/27488996/
• https://journals.sagepub.com/doi/abs/10.1177/026309239000900403?journalCode=lfna
• https://www.democratandchronicle.com/story/news/2018/06/01/mysterious-hum-highland-park-rochester-ny-taos-bristol-windsor-kokomo/633352002/

The Mayor’s Office is offering a $500 reward to the person who can clearly identify the source.