THIS TAKEN FROM PREVIOUS POST LINK, might be worth reading.

/> We develop products to protect hearing and improve listening.

Sonomax began in 1998 by creating hearing protection for industrial workers. Since then, the company has become a leader in sound isolating and enhancing technologies; and has created the revolutionary V4™ self-fit custom earpiece to work with headphones, Bluetooth™ headsets, high performance communication products for military, industrial and consumer. Sonomax aims to be the platform for any and all in-ear application.