Mineral stone ear plug that is made to match the shape of the outer ear inlet canal, has advantageous properties, such as high noise and dirt protection, low allergic reaction, long-term stability, etc.

摘要

Mineral stone ear plug is made in the shape of the outer ear inlet canal. Device positions a laser probe for measurement of the shape of the outer ear canal and the laser probe itself. After measurement of the dimensions of the outer ear inlet the ear plug is easily machined to the correct size.