Musician earplugs.
Problems with conventional earplugs
  • Most earplugs attenuate more then necessary when fitted properly.
  • Too much attenuation in the high frequencies makes speech and music sound muffled and unclear.
  • Users don't always wear them enough in their ears because they want to hear speech and machinery.

Solution: ER earplugs.

ER 15 and ER 25 have buttons that are designed to match the ear's natural response and attached to a custom earmold.

The result is that music and speech can still be heard clearly, but will not be as loud.

The theory and design of flat respones attenuators

A flat response attenuator must have a frequency response that follows the shape of the natural frequency response of the open ear, but at a reduced level.

The ER 15,ER 15SP (sport plug) ,and ER25 use diaphrams similar to a passive speaker cone, to achieve the desired response curve.

ER 15SP: In order to provide the smallest possible size, the 6 khz side branch resonance; (which smoothes the ER 15 response above 3KHz) was sacrificed in the ER 15SP; The result is a plug with less attenuation at 6khz, but is otherwise similar to the standard ER 15.

Shapes/Colors/Styles:

Top half: ER 15; ER 25 Musician earplugs

Bottom half: ER 15SP Sport plugs