Each ear is individually shaped. For this reason, it rarely succeeds manufacturers to produce perfectly fitting earphones. The Canadian company Sonomax Technologies makes this work equal to its customers. But they sat a bulky strap on the head and the ends of a lead into the ears.

The device then prevents liquid silicone injected into the inner ear, a plastic protection in mind that the right ear with the mixture comes into contact. After a short time, the hardened and customized earphone can be used subsequently. Depending on the version set in the USA will cost 200-300 dollars. The launch for the earphones with the name "Eers" is planned in Germany, prices are not yet available.