Earphones and headphone sales drive a healthy market in the United States. The market analysis firm ReportBuyer estimates that it will grow at a compound rate of over 12% until it is worth approximately US$9 billion in 2024. The products in question are mostly used in fitness, entertainment and gaming pursuits.
https://www.notebookcheck.net/The-US-earphone-headphone-market-will-be-worth-US-9-billion-in-5-years.420490.0.html